Tea vs Herbal Tea: What Counts as Tea and What Is an Herbal Infusion?
Author: Ukrainian Psychological Hub · Published: September 28, 2026 · Editorial Policy
Tea and herbal tea can look identical in a cup, sit on the same grocery-store shelf, and share the same everyday verb—“steep.” Their botanical identities are different. In the strict beverage sense, tea is made from Camellia sinensis, the tea plant. Herbal tea is the familiar consumer name for an infusion made from other plant materials such as chamomile flowers, peppermint leaves, rooibos, hibiscus calyces, ginger rhizome, fruit, bark, seeds, or spices. “Herbal infusion” and “tisane” are more precise terms for that second group.
The distinction becomes useful when you care about caffeine, processing, flavor, brewing, ingredient safety, or scientific evidence. It also clears up several common puzzles: matcha is tea; chamomile and rooibos are herbal infusions; yerba mate is a non-tea botanical infusion that naturally contains caffeine; jasmine tea can be true tea scented with jasmine; and a chai blend may contain black tea, only herbs and spices, or both. The ingredient list settles cases that the product name does not.
Tea vs herbal tea: the short answer
According to the U.S. National Center for Complementary and Integrative Health, green, black, oolong, and white tea are all produced from Camellia sinensis using different methods, while herbal teas are made from plants other than Camellia sinensis. Kew Science recognizes Camellia sinensis (L.) Kuntze as an accepted species in the family Theaceae.
• Tea: a beverage made from Camellia sinensis. Black, green, white, oolong, matcha, and pu-erh belong here.
• Herbal tea: the everyday name for an infusion or decoction made from other botanicals. Chamomile, peppermint, rooibos, hibiscus, ginger, and many fruit blends belong here when they contain no tea plant.
• Mixed or flavored products: the name on the front may be ambiguous. A blend can contain true tea plus herbs, flowers, fruit, or spices.
• Caffeine: tea leaves naturally contain caffeine, but “herbal” does not automatically mean caffeine-free because some non-tea plants, including yerba mate and guarana, are also natural caffeine sources.
In ordinary English, calling chamomile “tea” is completely normal. Botanical precision is most helpful when the distinction changes what you expect from the drink.
What counts as tea?
The tea plant is Camellia sinensis. Its harvested leaves and buds can be transformed into strikingly different beverages through processing. A 2022 review of differently processed tea describes white, green, oolong, black, and pu-erh as common processing-based tea categories and emphasizes that their phytochemical profiles vary substantially with processing and other factors (Wong, Sirisena, & Ng, 2022).
This is why “black tea plant” and “green tea plant” can be misleading shortcuts. Black tea and green tea are usually different outcomes of handling tea material rather than beverages from entirely unrelated plants. Withering, heating, rolling, oxidation, drying, roasting, and microbial post-processing can all contribute to the final chemistry and sensory profile. A broader review of processed Camellia sinensis teas likewise describes major chemical changes that occur during manufacturing (Zhang et al., 2019).
Black tea
Black tea is tea because its raw material comes from Camellia sinensis. Its processing promotes extensive oxidation before drying, producing a darker liquor and a profile often described as malty, brisk, fruity, woody, or robust depending on origin, cultivar, manufacture, and brewing.
Green tea
Green tea is also Camellia sinensis. Heat is used early in processing to limit enzymatic oxidation. The resulting sensory range can include grassy, vegetal, nutty, marine, sweet, roasted, floral, or savory notes. “Green” identifies a tea-processing family, not an herbal category.
White tea
White tea is made from tea buds and/or leaves with comparatively restrained processing. It remains true tea regardless of its pale color or delicate flavor.
Oolong tea
Oolong is a diverse tea family shaped by partial oxidation and highly variable manufacture. Light floral oolongs and dark roasted oolongs can taste dramatically different while sharing the same botanical tea origin.
Pu-erh and other dark teas
Pu-erh begins with tea-plant material and undergoes processing that can include microbial transformation and aging. It therefore remains tea in the botanical sense even though its production differs from the more familiar green-versus-black oxidation continuum.
Matcha
Matcha is powdered green tea. Because it is produced from Camellia sinensis, it is true tea. The fact that the leaf is ground and consumed as a suspension rather than simply infused does not move it into the herbal category.
What is herbal tea?
“Herbal tea” is a broad consumer category rather than one botanical family. It can describe drinks made from many unrelated plants and many different plant parts. The liquid may be prepared from leaves, flowers, fruit, peel, roots, rhizomes, seeds, bark, stems, spices, or mixtures of them.
A useful technical term is “herbal infusion.” “Tisane” is also widely used. In practice, these labels tell you that the beverage is based on plant material other than Camellia sinensis, unless the ingredient list shows that true tea has also been added.
The category is chemically diverse. Peppermint, chamomile, hibiscus, rooibos, ginger, and yerba mate are not interchangeable substances simply because stores place all of them under “herbal tea.” They come from different species, contain different compounds, taste different, and have different evidence bases. Any health or safety claim therefore has to be tied to the specific botanical and preparation, not to “herbal tea” as though it were one uniform ingredient.
What is a tisane?
A tisane is a non-tea botanical beverage prepared by extracting plant material into water. In modern English tea culture, “tisane,” “herbal infusion,” and “herbal tea” often refer to much the same shopping category. “Herbal tea” is the term most consumers use; “tisane” and “herbal infusion” make the botanical distinction clearer.
“Infusion” and “decoction” also describe preparation methods. Delicate leaves and flowers are commonly infused by steeping them in hot water. Tougher roots, bark, seeds, or woody material may be simmered or otherwise extracted for longer, depending on the ingredient and culinary tradition. Those are preparation distinctions, not a universal rule that every herbal drink requires boiling or every true tea requires cooler water.
The practical differences between tea and herbal tea
1. Plant origin
Tea begins with Camellia sinensis. Herbal infusions begin with other plants. This is the cleanest classification rule.
The rule also handles products with marketing names that sound like tea categories. “Red tea” may refer to rooibos in some markets, but rooibos comes from Aspalathus linearis, not Camellia sinensis. “Blue tea” often refers to butterfly-pea infusion, another non-tea botanical drink. Meanwhile, a genuinely unusual-colored tea cultivar can still be Camellia sinensis. Color alone cannot determine the category.
2. Processing
Tea processing is central to the identities of black, green, white, oolong, and dark teas. Changes in oxidation, heat treatment, rolling, drying, and post-processing alter aroma precursors, polyphenol profiles, color, mouthfeel, and flavor. Reviews of tea chemistry repeatedly show that different processing methods produce substantial compositional variation (Wong et al., 2022).
Herbal infusions have no single parallel processing system. One product may contain air-dried mint leaves; another roasted chicory root; another fermented botanical material; another powdered spices; another freeze-dried fruit. The phrase “herbal tea” therefore tells you less about processing than “green tea” or “black tea” does.
3. Caffeine
Tea leaves naturally contain caffeine. The amount that reaches a cup varies with the tea material, serving size, particle size, leaf-to-water ratio, water temperature, steep time, repeated infusions, and other factors. Health Canada lists brewed black or green tea as a dietary caffeine source and notes that caffeine content varies among foods and drinks (Health Canada).
Many common herbal infusions—such as plain chamomile, peppermint, rooibos, or hibiscus products—are chosen specifically because they do not contain tea leaves and are ordinarily sold without caffeine. But the category name “herbal” is not a caffeine guarantee. Health Canada identifies yerba mate and guarana as natural caffeine sources, and the European Food Safety Authority also lists tea leaves and guarana among plants that naturally contain caffeine (EFSA).
The practical rule is simple: if caffeine matters, read the ingredients and any caffeine statement rather than inferring from the word “herbal.” A botanical blend can contain mate, guarana, cacao, actual tea leaves, or added caffeine. A flavored true tea can also look “herbal” because it contains flowers or fruit while still retaining a caffeinated tea base.
4. Flavor and sensory structure
Tea has an enormous flavor range, but many teas share combinations of bitterness, astringency, aroma, sweetness, umami, body, and finish that emerge from tea chemistry and processing. Astringency is the drying or puckering oral sensation often associated with tea polyphenols; it is distinct from bitterness, which is a taste quality.
Herbal infusions span an even less unified sensory space because their ingredients are botanically unrelated. Peppermint can feel cooling and intensely aromatic; hibiscus can be tart; rooibos can seem woody, honeyed, or vanilla-like; chamomile can be floral and apple-like; ginger can be pungent and warming. A “herbal” label therefore predicts plant origin more reliably than it predicts flavor.
5. Brewing
There is no single perfect brewing temperature or steep time for either category. Tea style, leaf size, desired strength, and personal preference matter. So do the physical properties of herbal ingredients.
A delicate green tea may become more bitter when extracted aggressively, while some black teas tolerate hotter water well. A soft peppermint leaf and a dense ginger slice do not extract at the same rate. Whole spices, roots, and bark may need more time than flowers or tender leaves. Package instructions are a useful starting point, and systematic tasting is usually more informative than one universal “tea versus herbal tea” brewing rule.
6. Scientific evidence
Category precision matters most when someone moves from flavor into health claims. The evidence for green or black tea does not automatically apply to rooibos, chamomile, hibiscus, peppermint, or a mixed botanical product. The reverse is also true.
NCCIH explicitly distinguishes ordinary tea from herbal teas and separately notes that green tea beverage research and concentrated green-tea extracts are not interchangeable evidence categories (NCCIH: Tea). This distinction is important because a capsule containing a standardized extract can expose a person to compounds in proportions or doses that differ substantially from a brewed cup.
The same principle applies to herbal products. Research on a standardized chamomile extract, for example, should not be presented as proof that every chamomile tea has the same effect. Botanical identity, dose, extraction method, product composition, study population, and outcome all matter.
Is herbal tea “real tea”?
There are two valid levels of language here.
In botanical and technical classification, “tea” refers to beverages derived from Camellia sinensis, while chamomile, peppermint, rooibos, hibiscus, and similar drinks are herbal infusions or tisanes.
In ordinary language, “herbal tea” is a standard and useful name. People use “tea” more broadly for plant material steeped in water, and stores organize products that way because consumers understand the category. Precision does not require correcting every person who asks for chamomile tea. It requires knowing what the drink contains when the difference matters.
A good rule is: use “tea” for Camellia sinensis when discussing botany, caffeine, processing, or tea-specific research; use “herbal tea” when reflecting normal consumer language; and add “herbal infusion” or “tisane” when the distinction improves clarity.
Common examples: tea, herbal infusion, or mixed product?
Chamomile tea
Chamomile tea is an herbal infusion. It is prepared from chamomile flowers rather than the tea plant. Its familiar name is “chamomile tea,” while tisane or herbal infusion describes its botanical category.
Peppermint tea
Peppermint tea is an herbal infusion when the ingredient is peppermint alone. A commercial peppermint blend can still include green or black tea, so packaged mixtures deserve an ingredient check.
Rooibos tea
Rooibos is a South African botanical infusion made from Aspalathus linearis. It is not Camellia sinensis. Plain rooibos is commonly used as a naturally caffeine-free alternative to tea, but a “rooibos blend” can include other ingredients.
Hibiscus tea
Hibiscus tea is an herbal infusion. Its tartness can make it sensory-wise more similar to a fruit drink than to many traditional teas, despite sharing the same steep-and-sip format.
Ginger tea
Ginger tea is usually an infusion or decoction of ginger rhizome. It belongs to the herbal category unless tea leaves are also included.
Yerba mate
Yerba mate is made from Ilex paraguariensis, so it is a non-tea botanical beverage. It naturally contains caffeine. This example is especially useful because it breaks the common shortcut “herbal equals caffeine-free.” Health Canada includes yerba mate among natural caffeine sources (Health Canada).
Matcha
Matcha is true tea: finely ground green tea made from Camellia sinensis. Its powder format and vivid color do not make it an herbal infusion.
Jasmine tea
Traditional jasmine tea is often green tea scented with jasmine blossoms, though other tea bases are possible. In that case, it remains tea because the beverage contains Camellia sinensis. A product made only from jasmine flowers would instead be an herbal infusion. The same name can therefore point to different formulations.
Masala chai and “chai tea”
Masala chai is commonly made from black tea, spices, milk, and often sweetener. That version is a spiced true-tea beverage. But “chai” has become a broad flavor label in retail products, and some caffeine-free “herbal chai” blends contain spices without tea leaves. The ingredient list matters more than the word “chai.”
Fruit tea
Fruit tea often means an infusion made from dried fruit, peel, hibiscus, rose hips, flavorings, or other botanicals. Some products also blend fruit with black, green, white, or oolong tea. “Fruit tea” therefore describes flavor and composition imperfectly; ingredients resolve the category.
Decaffeinated tea
Decaffeinated black or green tea is still tea because its botanical starting material is Camellia sinensis. Decaffeination changes caffeine content; it does not turn tea into an herbal infusion. “Decaf” and “herbal” are separate concepts.
Flavored tea, scented tea, and blended tea
One of the most common classification errors is to assume that the presence of flowers, fruit, spices, or herbs automatically makes a drink herbal tea. A true tea can be flavored, scented, or blended with non-tea ingredients.
Earl Grey, for example, is usually black tea flavored with bergamot. It remains tea. Jasmine green tea remains tea when green tea is the base. A black-tea blend with cinnamon, clove, orange peel, and vanilla remains a true-tea blend because Camellia sinensis is present.
• Pure tea: Camellia sinensis without non-tea botanicals as primary ingredients.
• Flavored, scented, or blended tea: Camellia sinensis plus flowers, fruit, spices, herbs, flavorings, or other ingredients.
• Herbal infusion or tisane: a botanical drink without Camellia sinensis.
This classification is especially useful for caffeine questions because a blend that looks floral or fruity may still contain a conventional tea base.
How to tell what is in your cup in 30 seconds
1. Read the ingredient list. If it contains Camellia sinensis, black tea, green tea, white tea, oolong, pu-erh, matcha, sencha, Assam, Darjeeling, or another recognized tea style, the product contains true tea.
2. If the ingredients are entirely other botanicals—such as chamomile, peppermint, rooibos, hibiscus, ginger, rose hip, lemongrass, or fruit—it is an herbal infusion.
3. If both groups appear, it is a tea-and-botanical blend rather than a pure example of either side.
4. If caffeine matters, look for a caffeine statement and scan for ingredients such as tea, mate, guarana, cacao, or added caffeine. Do not infer caffeine status from “herbal,” “natural,” “wellness,” “night,” or “energy” language alone.
5. Follow the brewing instructions for the actual product rather than applying one generic tea rule to every plant material.
Does herbal tea have caffeine?
Many popular herbal infusions are naturally caffeine-free, but “herbal tea” is too broad a category to guarantee that. Some non-tea botanicals naturally contain caffeine, and mixed products can contain true tea or added caffeine.
Health Canada lists tea, coffee, chocolate, kola, guarana, and yerba mate among natural dietary caffeine sources. EFSA likewise identifies caffeine as naturally occurring in multiple plant constituents, including tea leaves, guarana berries, coffee and cocoa beans, and kola nut (EFSA; Health Canada).
For someone choosing an evening drink, managing caffeine sensitivity, or trying to understand why a product feels stimulating, the ingredient list is more reliable than the shelf category. Caffeine can increase alertness and reduce sleepiness, and individual sensitivity varies. That is a pharmacological effect of caffeine, not evidence that the word “tea” or the ritual of drinking a warm cup has one universal psychological effect.
Tea, herbal infusions, and health claims
The word “tea” often carries a halo of health language, and “herbal” can carry an even stronger one. Neither label is a clinical outcome.
For true tea, NCCIH notes that human evidence for several widely promoted health effects is limited or inconclusive and distinguishes tea beverages from green-tea extracts (NCCIH). That matters because concentrated extracts and supplements are different exposures from ordinary brewed tea.
For herbal infusions, evidence must be evaluated one plant and one preparation at a time. Chamomile illustrates the problem clearly. It has a long traditional association with bedtime, yet NCCIH reports that there is no conclusive clinical-trial evidence showing that chamomile is helpful for insomnia, and its dedicated chamomile review notes very little information on insomnia outcomes (NCCIH: Sleep Disorders; NCCIH: Chamomile).
A comforting bedtime cup can still be meaningful as a routine, sensory cue, or preferred caffeine-free beverage. That psychological reality is separate from a claim that the plant treats insomnia. The same distinction should be applied to anxiety, depression, digestion, blood pressure, and other health-related claims: everyday experience, traditional use, preliminary evidence, and established clinical efficacy are different evidence categories.
Why tea and herbal tea can feel psychologically similar
Botanical classification does not determine the whole drinking experience. Tea and herbal infusions can occupy the same behavioral niche: holding a warm cup, pausing work, sharing a drink with someone, beginning the morning, marking the end of dinner, or creating a bedtime routine. Those repeated contexts can become learned cues.
A person may therefore experience “tea time” as one stable ritual even when the cup alternates among black tea, rooibos, mint, and chamomile. The shared ritual can support familiarity, anticipation, and memory without making the beverages chemically equivalent.
Expectation can change perceived flavor
Sensory experience is constructed from chemical input plus context. Reviews in food perception show that external information such as brands, prices, packaging, and other cues can influence taste and flavor judgments through expectation (Okamoto & Dan, 2013). A 2023 systematic review likewise found that visual cues can influence taste or flavor perception in some conditions, while also finding mixed, limited, and null effects in others (Motoki, Spence, & Velasco, 2023).
That evidence is about general multisensory food perception, not a license to claim that every “herbal,” “premium,” “calming,” or “ceremonial” label changes every person’s tea experience. It does explain why names and packaging can help set an expectation before the first sip. A drink labeled “herbal night blend” may be approached differently from the same sensory profile presented as an “aromatic botanical infusion.” The label can frame experience; it does not rewrite the ingredient chemistry.
“Herbal” can function as an expectation cue
Consumers often associate “herbal” with naturalness, caffeine-free drinking, relaxation, or wellness. Some of those expectations fit many products; others fail for specific blends. Yerba mate is the clearest caffeine example. A mixed herbal product may also include ingredients with medication interactions or allergenic potential.
The psychologically useful move is to pair expectation with ingredient literacy: enjoy the meaning of the ritual while checking the actual product when caffeine, allergies, medications, pregnancy, or clinical symptoms make composition important.
Habit and ritual do not erase chemistry
A familiar cup can feel comforting because of learned timing, temperature, aroma, context, and repetition. Caffeine can simultaneously produce pharmacological effects. The cup is both an object with measurable chemistry and an experience shaped by learning and context. Keeping those levels separate prevents confusing sensory ritual with drug action.
For a cross-beverage example of how labels, origin, price, and packaging can shape sensory expectation, see Coffee Branding and Taste: How Labels, Price, Origin, and Packaging Change Perception.
Which is better: tea or herbal tea?
The useful choice depends on what you want from the cup.
• Choose by flavor if the goal is enjoyment. Tea can range from grassy and floral to malty, roasted, fruity, smoky, or earthy. Herbal infusions can be floral, minty, tart, spicy, woody, sweet, resinous, or fruit-forward.
• Choose by caffeine if stimulation or sleep timing matters. Tea usually contributes caffeine; many herbals do not, but ingredient-level exceptions matter.
• Choose by ritual if the preparation itself matters. Loose-leaf tea, matcha whisking, a pot of black tea, or a simple mint infusion can each create a different pace and sensory routine.
• Choose by ingredients when allergies, pregnancy, medications, or health conditions matter. “Herbal” is not a safety category.
• Choose by evidence when a health outcome is the goal. Look for research on the specific beverage or botanical preparation rather than transferring evidence from tea, an extract, or a different herb.
Tea vs herbal tea for evenings and sleep
The most relevant difference for many evening drinkers is caffeine, not the technical label itself. A conventional black, green, white, oolong, or matcha drink contains caffeine, though the amount in a serving can vary. A plain caffeine-free herbal infusion avoids that source of stimulant exposure. A caffeinated botanical such as yerba mate does not.
Choosing a caffeine-free drink in the evening can make sense for people whose sleep is sensitive to caffeine. That does not establish the drink as an insomnia treatment. A warm beverage, repeated bedtime routine, and familiar aroma may also become contextual cues for winding down; those behavioral associations can coexist with limited evidence for a specific herb’s clinical sleep effect.
When insomnia is persistent, severe, or affecting daytime functioning, beverage choice and a clinical sleep disorder are separate questions. The classification “herbal tea” is not a diagnosis or treatment category.
Tea vs herbal tea for anxiety or a “calmer” feeling
Caffeine can contribute to nervousness or sleep disruption in sensitive people, and Health Canada lists insomnia, irritability, headache, and nervousness among possible effects of caffeine consumption (Health Canada). That makes caffeine content a relevant variable when someone says one drink “feels calmer” than another.
Ordinary calmness after a warm caffeine-free drink should not be converted into a claim that herbal tea treats an anxiety disorder. Context, expectation, time of day, learned routine, aroma, temperature, and removal of caffeine can all contribute to the experience. Clinical anxiety requires its own evidence and assessment.
Why the category matters for research and AI-generated advice
Tea is a frequent source of category errors in summaries, wellness content, and automated answers. Three mistakes are especially common.
1. Evidence about green tea is generalized to “tea,” then generalized again to every beverage called tea.
2. Evidence about isolated caffeine, L-theanine, polyphenols, or botanical extracts is presented as if an ordinary cup delivered the same dose and composition.
3. Traditional use is rewritten as clinical efficacy.
A reliable evidence chain keeps the object of study stable. If a trial used a standardized extract, the conclusion belongs to that extract and dose. If an observational study examined tea beverage consumption, it establishes association within that population and design, not a universal causal effect. If a chamomile supplement was studied, its result does not automatically describe a weak chamomile infusion prepared at home.
“Tea,” “green tea,” “green-tea extract,” “herbal tea,” “chamomile tea,” and “chamomile extract” are different evidence objects.
Frequently asked questions
Is herbal tea actually tea?
In strict botanical usage, tea comes from Camellia sinensis, while herbal tea is an infusion or tisane made from other plants. In everyday English, “herbal tea” is a normal and widely understood name.
What is the difference between tea and a tisane?
Tea contains Camellia sinensis. A tisane is a water-based preparation of other botanicals such as herbs, flowers, roots, fruit, bark, seeds, or spices.
Does herbal tea always have zero caffeine?
No. Many familiar herbal infusions are caffeine-free, but some non-tea botanicals naturally contain caffeine, including yerba mate and guarana. Mixed products can also contain actual tea leaves or added caffeine.
Is green tea an herbal tea?
Green tea is true tea made from Camellia sinensis. It belongs to the same botanical tea family as black, white, and oolong tea.
Is matcha an herbal tea?
No. Matcha is powdered green tea made from Camellia sinensis, so it is true tea.
Is chamomile tea true tea?
Chamomile is an herbal infusion made from chamomile flowers. “Chamomile tea” is the standard everyday name, while “chamomile infusion” or “chamomile tisane” is botanically more precise.
Is rooibos tea true tea?
Rooibos comes from Aspalathus linearis, not Camellia sinensis. It is a botanical infusion, commonly called rooibos tea or red tea.
Is yerba mate tea?
Yerba mate is made from Ilex paraguariensis, so it is not tea in the Camellia sinensis sense. It is also naturally caffeinated, which is why “non-tea” and “caffeine-free” should not be treated as synonyms.
Is chai herbal tea?
It depends on the product. Traditional masala chai commonly uses black tea with spices, so it contains true tea. “Herbal chai” may use spices and other botanicals without tea leaves. Read the ingredients.
Is jasmine tea an herbal tea?
Often, no. Jasmine tea is commonly a green-tea or other true-tea base scented with jasmine flowers. A jasmine-flower-only infusion would be herbal. Product composition decides the category.
Can tea and herbs be mixed together?
Yes. Many flavored and blended teas combine Camellia sinensis with flowers, fruit, herbs, spices, or flavorings. Such a drink contains true tea and botanical additions.
Is decaf tea the same as herbal tea?
No. Decaffeinated black or green tea begins as Camellia sinensis tea and undergoes decaffeination. Herbal infusion begins with other plants. The categories describe different things.
Are all herbal teas safe because they are natural?
Botanical origin does not guarantee universal safety. Different plants can have different allergens, pharmacologically active compounds, contraindications, and medication interactions. When those issues matter, identify the exact ingredients rather than relying on the umbrella term “herbal tea.”
Related Articles
References
European Food Safety Authority. Caffeine. https://www.efsa.europa.eu/en/topics/topic/caffeine
Health Canada. Caffeine in Foods. https://www.canada.ca/en/health-canada/services/food-nutrition/food-safety/food-additives/caffeine-foods.html
Kew Science, Plants of the World Online. Camellia sinensis (L.) Kuntze. https://powo.science.kew.org/taxon/828548-1
Motoki, K., Spence, C., & Velasco, C. (2023). When visual cues influence taste/flavour perception: A systematic review. Food Quality and Preference, 111, 104996. https://doi.org/10.1016/j.foodqual.2023.104996
National Center for Complementary and Integrative Health. Chamomile: Usefulness and Safety. https://www.nccih.nih.gov/health/chamomile
National Center for Complementary and Integrative Health. Sleep Disorders and Complementary Health Approaches: Usefulness and Safety. https://www.nccih.nih.gov/health/sleep-disorders-and-complementary-health-approaches
National Center for Complementary and Integrative Health. Tea. https://www.nccih.nih.gov/health/tea
Okamoto, M., & Dan, I. (2013). Extrinsic information influences taste and flavor perception: A review from psychological and neuroimaging perspectives. Seminars in Cell & Developmental Biology, 24(3), 247–255. https://doi.org/10.1016/j.semcdb.2012.11.001
Wong, M., Sirisena, S., & Ng, K. (2022). Phytochemical profile of differently processed tea: A review. Journal of Food Science, 87(5), 1925–1942. https://doi.org/10.1111/1750-3841.16137
Zhang, L., Ho, C.-T., Zhou, J., Santos, J. S., Armstrong, L., & Granato, D. (2019). Chemistry and biological activities of processed Camellia sinensis teas: A comprehensive review. Comprehensive Reviews in Food Science and Food Safety, 18(5), 1474–1495. https://doi.org/10.1111/1541-4337.12479