Black tea has been brewed in villages and palaces alike for centuries. Stories trace its journey through trade routes stretching from China’s provinces to the tables of British royalty, and the bustling markets of India. Only recently did science start to pull apart those deep, dark leaves looking for the unique compounds inside. Modern extraction found ways to concentrate black tea’s benefits by pulling out its polyphenols, catechins, theaflavins, and caffeine. These efforts built on years of tradition—a tradition that saw black tea as medicine and social anchor. So, when companies discuss tea extract today, they’re not just peddling a commodity; they’re continuing a narrative that runs through history, touching on health, custom, and commerce.
Once the leaves finish steeping and move to extraction, what’s left is a dark brown, fine powder. Good-quality black tea extract should smell rich, malty, and slightly sweet—pretty close to what pours from a sturdy teapot. Pick it up, and the texture feels smooth without clumping. When mixed with water, it dissolves quickly, rarely leaving sediment. Consistency in particle size helps it blend in drinks, supplements, and even cosmetics where uniformity keeps things predictable. Proper care keeps out moisture; black tea extract is hygroscopic, meaning it’ll pull in water from the air, which challenges manufacturers to wrap it up tight. As for stability, low temperatures and light-free storage keep its most important molecules—like EGCG and theaflavins—intact, holding onto the antioxidant power people want from black tea.
Scientists use a battery of tests to lock down what’s in a serving of black tea extract. The percentage of polyphenols matters most—a higher number points to more antioxidant punch. Caffeine content varies, but on average, a gram of extract carries the lift of a strong cup of tea. Theaflavins and catechins, responsible for those deep, robust flavors, get measured down to the milligram. Labels on finished products must reflect batch analysis, highlighting not just headline ingredients but also possible heavy metals, purity grades, and microbial profiles. This rigorous transparency isn’t just red tape; it guards companies and keeps consumers safe. Honest specs support brands when explaining where their raw material comes from and what sets their formulation apart from low-quality knock-offs.
The process starts by soaking black tea leaves in either hot water or a carefully chosen food-grade solvent like ethanol. These solvents pull soluble compounds out from the leaves, leaving behind cellulose and fibers. Filtration clears the liquid of solids, and careful evaporation drops out the unwanted solvent or water, slowly forming the prized concentrated extract. Some players use freeze-drying to keep flavor and nutrients intact. Finer adjustments include filtering out tannins to avoid bitterness or tweaking temperature and time to coax the richest antioxidant content from different tea batches. Technological improvements now allow strict tracking from plant to powder; manufacturers analyze lots in real time, refocusing their technique on maximizing health-promoting catechins without sacrificing all-important flavor.
Black tea’s chemistry isn’t simple. During processing, enzymatic oxidation turns catechins into theaflavins and thearubigins—the compounds that mark black tea apart from green. Temperature and pH changes unlock some bioactive molecules and darken color, giving black tea its signature appearance. Some companies enrich extracts with extra caffeine or theaflavins for specific health effects. Chemical treatments like microencapsulation extend shelf-life and protect sensitive ingredients from degrading in harsh environments—think sport supplements or beauty creams. Purification with activated charcoal or special membranes cuts down on unwanted flavors and residual pesticides, increasing safety and consumer appeal at the same time.
Walk down any health aisle, and black tea extract pops up under a swarm of synonyms: Camellia Sinensis Extract, Fermented Tea Extract, Theaflavin-rich Extract, and Pure Tea Polyphenols. Legacy brands sometimes refer to their material as “English Breakfast Extract” or “Assam Tea Essence.” Ingredient decks for supplements, functional foods, or cosmeceuticals might shorten it to “Black Tea Polyphenols” or “Instant Black Tea Concentrate.” Clear naming helps users compare products, avoid duplication, and ensures those with allergies or caffeine restrictions know exactly what they’re buying.
Every company that moves black tea extract from lab to store shelf faces a wall of regulations. Factories observe Good Manufacturing Practices (GMP) to ensure each lot remains clean, safe, and free from dangerous pathogens or toxic heavy metals. Safety inspectors check that caffeine loads never creep above listed limits; batch records need to show full traceability from raw leaf to finished powder. Allergen management standards keep gluten and other problem contaminants out of extracts. Reputable producers back labels with certificates of analysis and third-party testing. For exports, finished labels translate nutritional breakdown into the required language, meeting European EFSA rules or North American FDA nutrition panel laws. Compliance isn’t a cost burden—it’s the guarantee that what ends up in a canister, capsule, or energy bar actually does what the makers say.
Black tea extract fills a lot more than mugs today. In supplements, fitness enthusiasts want its caffeine and polyphenols for a mental boost and cardiovascular support. Food companies add it to energy bars, beverages, yogurts, and snacks looking for an antioxidant headline. Cosmetic brands blend extracts into skin creams, capitalizing on anti-aging claims built on solid laboratory data around theaflavins’ role in repairing UV damage and boosting elasticity. Pharmaceutical researchers experiment with black tea polyphenols in new drug delivery systems, exploring anti-inflammatory and cholesterol-lowering properties. Even pet food manufacturers jump in—testing ways these natural antioxidants can improve animal wellness. These wide-ranging uses prove that black tea is no longer confined to the breakfast table.
A mountain of studies support black tea extract’s role in fighting oxidative stress, reducing cardiovascular risk factors, and improving mental alertness. Published research in journals like the European Journal of Nutrition and Phytomedicine highlights how theaflavins and catechins scavenge free radicals, potentially protecting cells from chronic disease. Meta-analyses have linked regular intake with modest reductions in LDL cholesterol and improved endothelial function—the stuff crucial for fighting heart disease. Some work connects black tea’s polyphenols with lower rates of cognitive decline in older adults, too. Still, many results come from high-dose extracts, not the kind found in everyday teas. The jump from petri dish or rat study to real-world, human health isn’t always straightforward.
Most toxicology tests rate black tea extract as safe at moderate doses. Side effects—like sleep trouble or jitters—come from caffeine, not the leaf itself, and mostly in people downing double or triple the recommended serving. Long-term animal trials haven’t turned up mutations or tumor growth, and regulatory agencies consider its polyphenols “generally recognized as safe” (GRAS) for use in foods and dietary supplements. Outliers exist: high concentrations can bind iron and affect mineral absorption, posing risks for people with anemia, small children, or pregnant women. Companies tweak their guidance based on this data, and careful labeling reflects the narrow but real risks, especially for sensitive consumers.
Research never stands still, and black tea extract keeps finding its way into new formulas and scientific studies. Teams focus on unlocking deeper medicinal effects: can theaflavins help manage blood sugar, or fine-tuned combinations aid cancer prevention? Biotechnology advances promise tailored blends, isolating minor but powerful polyphenols never before available at scale. With the rise of clean-label and plant-based lifestyles, demand constantly pushes for greener extraction methods, better transparency in sourcing, and full disclosure of every step from field to market. These pressures drive the next generation of black tea products, promising stronger benefits, greater safety, and a fresh link back to the story that started in ancient, smoky tea houses and now shapes shelves around the world.
Black tea has filled mugs around the world for centuries. Researchers began digging into what makes it special well before tea bags lined supermarket shelves. What they found carries weight. Black tea extract, made from the leaves of the Camellia sinensis plant, delivers more than bold flavor. Polyphenols—especially theaflavins and thearubigins—turn out to be tough defenders inside the body.
Human studies point to a measurable difference in inflammation markers after regular black tea consumption. For someone struggling with swelling in joints or low-level inflammation, drinking tea or taking black tea extract could drive noticeable change. Oxidative stress, a silent troublemaker linked to aging and chronic illness, also drops with intake. Researchers credit the antioxidant punch packed in the extract for these effects.
Think about how many families deal with high blood pressure. Black tea extract steps up here too. Clinical trials show a drop in both systolic and diastolic readings after several weeks of use. This isn’t just a slight dip. In some cases, readings rival changes brought by dietary salt reduction or more exercise. LDL cholesterol—the “bad” cholesterol—also lowers with daily use. People aiming to dodge heart attacks or strokes find this meaningful.
Memory tends to slip with long days and little sleep, but cognitive decline signals bigger problems. Extracts from black tea hit multiple brain-protective pathways. Some studies link frequent consumption to a sharper working memory and slower onset of dementia in older adults. Polyphenols cross the blood-brain barrier and tamp down oxidative stress in brain tissue. These findings connect with what many can observe: regular tea drinkers seem to keep their wits about them further into life.
A tangled gut can drag down energy and mood. Oligosaccharides in black tea support a healthier balance of gut bacteria. When microbes thrive, the whole digestive system works better. Appetite regulation shifts, too, with black tea extract helping break the cycle of sugar spikes and crashes. Those tracking blood sugar find that tea extract softens after-meal glucose swings. The American Heart Association has cited these benefits when talking about dietary choices that fight Type 2 diabetes.
Beyond the lab, black tea extract often lands in capsule or powder form on health food shelves. People toss it in smoothies, protein shakes, or plain water. My own routine started simple—a morning cup of strong black tea—before I tried a standardized extract. After a month, energy levels no longer crashed after lunch, and a long track run didn’t leave legs swollen for days.
Key to remember: not everyone reacts the same. High doses can trigger faster heartbeat or restless nights, owing to caffeine content. Pregnancy, certain medications, and heart rhythm issues deserve extra caution. A healthcare professional ought to weigh in before starting a new supplement, especially for anyone with chronic health conditions.
Reliable ingredient sourcing means better results. Scan product labels or search for GMP certification, and stick with established brands. Modern science doesn’t view black tea extract as a miracle cure, but the evidence supports solid gains in daily well-being, from heart and brain to gut and mood. Adopting small changes adds up. For plenty of people, the simple act of brewing or mixing in a bit of black tea extract marks a smart step toward better health.
Anyone who’s brewed a cup of black tea in the morning knows the buzz. Black tea leaves come right from the Camellia sinensis plant, the same source as green and oolong teas. Nature packs those leaves with caffeine, and when companies make black tea extract, they usually pull that same caffeine into the finished powder or liquid.
Companies use water or alcohol to draw out everything tea leaves offer. That process doesn’t just pull out flavor and color — it also pulls out caffeine. Most commercial black tea extracts hold anywhere from 3% to 8% caffeine by dry weight. That means a small supplement serving delivers about the same punch as a cup of black tea. Some extracts are standardized for caffeine content, so labels tell you what to expect; others want to highlight something else, like antioxidants. In most cases, if it says “black tea extract” on the label and doesn’t mention removing caffeine, caffeine remains.
Plenty of folks reach for black tea extract for its supposed health benefits — a natural energy lift, antioxidants called theaflavins, even a cozy feeling for those who love a tea-based ritual. Chemically-speaking, caffeine is a central nervous system stimulant. It can help wake up the mind and body, but too much may leave you with a racing heart, stomach upset, or jitters. Some supplements sneak extra caffeine in by adding green tea extract or guarana, so those looking to keep track should check labels carefully.
Years of drinking strong Assam tea have taught me that not everyone tolerates caffeine equally. A shot of black tea extract before a morning run gives just the right level of alertness. Mixing that extract into a post-lunch smoothie, though, left me lying awake at midnight. Some folks get used to caffeine’s effects, but others feel wired with even a low dose. It’s not about building “tolerance” so much as learning what your own body likes.
Scientists have run studies on caffeine and heart rhythm, blood pressure, and even sleep cycles. Too much caffeine, especially late in the day, interrupts sleep for sensitive people. Moderation seems best. According to research in medical journals, about 400 milligrams of caffeine daily — the equivalent of four strong cups of brewed black tea — counts as a safe upper limit for most adults. Black tea extract supplements can concentrate caffeine, so one scoop or capsule might equal several cups.
Clear labeling matters. People shouldn’t end up taking more caffeine than they bargained for just because they didn’t realize black tea extract delivers an extra buzz. Reputable manufacturers post caffeine content on their labels. Those trying to cut back should go for decaf extracts, which use special processing to remove most of the caffeine. Healthcare providers and trusted consumer reports offer extra guidance for those with specific health concerns.
Knowing that black tea extract often brings caffeine along for the ride empowers smarter decisions. It isn’t just another herbal powder; it’s a concentrated source of stimulation best used mindfully. For those with caffeine sensitivity, heart conditions, or sleep issues, reading the fine print or asking a pharmacist makes a difference.
Few drinks carry the history and community of black tea. These days, black tea extract shows up everywhere—from supplements to skin creams to fancy drinks that promise extra focus or effortless weight loss. Most folks reach for it because it brings that antioxidant buzz, supports alertness, or even helps calm an upset stomach. But things change once black tea's goodness gets concentrated in an extract.
Black tea extract, often loaded with polyphenols like theaflavins and thearubigins, gives a stronger punch than the cup you have at breakfast. At higher doses, that boost might not suit everyone. My own first jump into supplements with tea extract brought a few days of shaky hands and some trouble sleeping. Caffeine sits front and center here—extract packs more of it, so people sensitive to caffeine notice side effects faster. Caffeine can cause restlessness, headache, or even a racing heart, especially for folks who don't usually drink much tea or coffee. According to Mayo Clinic, healthy adults should keep caffeine under 400 milligrams each day. Black tea extract can send you over that line before lunchtime.
Digestive issues come up a lot in folks using black tea extract supplements. Oddly enough, too much of a good thing can bother the stomach. Some people get heartburn or nausea. For me, strong doses just made me queasy, especially early in the morning before food. It's not so different from drinking coffee on an empty stomach—the natural compounds in black tea stimulate the gut. That doesn’t mean everyone will feel sick, but if your stomach feels off after drinking regular black tea, expect a similar or stronger reaction in extract form.
People taking certain medications have to be careful. Black tea extract can interact with blood thinners, some heart medications, or drugs that affect blood pressure. It may also affect the way the body absorbs iron. My mom always took her iron pill hours apart from her daily cup of tea, because tannins in tea can lower iron absorption. Now imagine that effect racheted up with extract. According to the National Institutes of Health, anyone with iron deficiency or anemia should probably avoid tea supplements.
Some cases (rare, but reported in medical journals) link very high doses of polyphenol-rich extracts to liver problems. Even if those incidents don't show up often, they're worth noting for people who already face liver or kidney difficulties. Supplements aren’t tested as thoroughly as other medications, so one person’s “safe” dose might be rough for someone else’s liver. Always talk with a doctor or pharmacist if you already have chronic issues.
Sticking with moderate amounts makes all the difference. Read labels closely: some extracts hide the caffeine count behind fancy names or blends. Don’t forget to consider any other caffeine sources in the diet, too. Instead of chasing quick fixes, try using black tea extract occasionally, as part of a balanced routine that doesn’t put all the health hopes on one ingredient. For people with medical conditions, a quick chat with a professional beats internet advice every time.
Black tea extract brings real benefits, just not without some risks. There’s no shame in asking questions or starting slow. Supplements can help support a lifestyle, but paying attention to side effects keeps things safe and pleasant.
Curiosity about black tea extract has picked up steam, mostly because more folks want health benefits without boiling water all day. You’ll spot these supplements online, at vitamin stores, sometimes even tucked behind the checkout at a grocery store. Throw “antioxidants” on the bottle, and the curiosity gets even louder.
I remember seeing my uncle, a roofer in his 50s, asking his pharmacist if drinking Lipton counted as “taking an extract.” The answer—while a little funny—shows how easy it is to get mixed up. Tea in your mug and an extract in a capsule work differently.
Plenty of people drink black tea hoping to lower cholesterol or give their immune system a push. The extract takes those plant chemicals—mainly theaflavins and catechins—and packs them tight, so one small capsule can rival several cups of tea. Studies hint that these antioxidants can ward off some cell damage, and a 2022 review in the journal Nutrients found black tea extract may play a role in heart health, though more human trials still need to back this up.
Green tea sometimes steals the spotlight, but black tea shows up strong for lowering LDL (“bad” cholesterol). A classic study from the American Journal of Clinical Nutrition shared that people saw cholesterol improvement after eight weeks of extract use—not tea bags, but the actual supplement.
Labels on bottles glide past a lot of important detail. I always look for clear dosing info. Most brands suggest 250–500 mg a day, preferably taken with food. Skipping a meal and popping one of these can set off a bitter taste or mild stomach gripes in some folks, including me.
Not everyone breaks down caffeine the same. If coffee jitters make you climb the walls, black tea extract packs less punch but still enough caffeine to stir things up, especially for anyone sensitive. I try not to take it late in the afternoon—sleep matters more than a little antioxidant boost.
Supplements in the U.S. don’t go through the same FDA hoops as medicines. One bottle can claim “standardized” extract, the next one just says “natural,” and there’s no easy way to spot quality. I stick with brands that show “third-party tested” right on the label. ConsumerLab and USP both have lists online, and it’s worth the ten minutes to check.
Some black tea extracts bring side effects. I’ve heard people talk about headaches and faster heartbeats. If you use blood thinners like warfarin, it pays to ask a doctor before digging through the supplement aisle—black tea can interact with certain meds. Pregnant or nursing? Avoid these supplements until your provider gives a clear green light.
Not every diet needs supplements. If your mornings already start with real black tea, and you eat plenty of vegetables, the bottle might just add dollar signs to your grocery bill. For anyone aiming to lower cholesterol or up their antioxidants—especially if they can’t drink tea for health reasons—these supplements have a place, as long as they’re used with care and attention.
A lot of what works well in health boils down to paying attention. Read the ingredients, try a low dose at first, watch your own side effects, and listen to a professional if your gut says something feels off. Black tea extract has promise, but like most things in wellness, slow and steady wins out over chasing every trend.
Black tea shows up in mugs around the world every day, making it easy to assume anything “extracted” from that leaf would be safe. There’s real curiosity about taking black tea extract in capsules or adding concentrated powders to smoothies. The promise is tempting: higher levels of antioxidants, less caffeine than coffee, maybe even a bit of energy without the jitters. But how safe is it to take this shortcut to those health benefits every single day?
Most black tea extracts contain polyphenols, especially theaflavins and thearubigins. These natural compounds have grabbed research attention for their roles in supporting heart health, controlling inflammation, and helping blood vessels function smoothly. Studies out of reputable sources, including the USDA and several major medical journals, connect black tea polyphenols to lower risks for certain chronic diseases. Compared to green tea, black tea has a richer, malty flavor, but the benefits often come from the same family of plant chemicals.
Caffeine in black tea extract can sneak up on you, especially in higher-dose supplements. A standard serving delivers far less caffeine than a cup of strong coffee, but extracts can vary wildly. Someone sensitive to caffeine might notice increased heart rate, jittery hands, or trouble sleeping. I once tried doubling up on a “pure” black tea extract supplement when coffee ran out at work—let’s just say my focus left the building. Overdoing it with tannins can also be rough on some stomachs, sometimes irritating the digestive tract. People who struggle with ulcers or irritable bowel problems might need to think twice before tossing a scoop into their protein shakes.
Research points toward safety for most people when using real black tea products in moderate amounts, the way most people drink tea. Supplements and extracts, though, usually lack the long track record behind brewed tea. Doses in studies often stay under the equivalent of three to four cups of tea a day. Step past that line, and side effects like nausea or elevated blood pressure pop up more often. The National Institutes of Health gives brewed black tea a green light for daily use, but places extracts in the “possibly safe” camp simply because long-term studies just aren’t there yet.
People on blood thinners, cholesterol medicines, or certain antidepressants could hit trouble with high concentrations. Black tea can interact with medications through both caffeine and plant compounds. Pregnant people or those breastfeeding don’t get clear safety assurances from current research. Kids don’t need caffeine at all, so black tea extract is best kept out of children’s reach. Kidney stone formers should remember that tea extracts concentrate oxalates, which can feed stone formation. From my own experience coaching folks on nutrition, I’ve seen side effects fade immediately after taking extracts off the table.
Sticking to brewed black tea is one way to enjoy the taste and get antioxidants. If opting for extract, reading the label matters. Look for brands that share test results for heavy metals and caffeine content. Start with a small serving and see how your body handles it. People with unique health histories or lots of medications already know: ask your healthcare provider before trying a new supplement. Plants might be natural, but concentrated plant powders don’t always behave like the leaf you grew up drinking.
| Names | |
| Preferred IUPAC name | Tea, extracts (Camellia sinensis, ext.) |
| Other names |
Black Tea Polyphenols Camellia sinensis Extract Fermented Tea Extract Theaflavin Extract Tea Extract |
| Pronunciation | /ˈblæk tiː ɪkˈstrækt/ |
| Preferred IUPAC name | Black tea, ext. |
| Other names |
Black Tea Polyphenols Camellia sinensis Extract Theaflavins Fermented Tea Extract Thearubigins |
| Pronunciation | /ˌblæk ˈtiː ɪkˈstrækt/ |
| Identifiers | |
| CAS Number | 84650-60-2 |
| Beilstein Reference | 3858735 |
| ChEBI | CHEBI:35619 |
| ChEMBL | CHEMBL4290399 |
| ChemSpider | 1219729 |
| DrugBank | DB14509 |
| ECHA InfoCard | 03-2119977106-49-0000 |
| EC Number | 242-841-0 |
| Gmelin Reference | Gmelin Reference: 97255 |
| KEGG | C09578 |
| MeSH | D020017 |
| PubChem CID | 442793 |
| RTECS number | XN8195000 |
| UNII | 5LXU5N1RH9 |
| UN number | UN3077 |
| CompTox Dashboard (EPA) | DTXSID4022575 |
| CAS Number | [\"84650-60-2\"] |
| Beilstein Reference | 4091625 |
| ChEBI | CHEBI:83413 |
| ChEMBL | CHEMBL4299433 |
| ChemSpider | 591275 |
| DrugBank | DB15896 |
| ECHA InfoCard | ECHA InfoCard: "03-2119954232-51-0000 |
| EC Number | 242-449-1 |
| Gmelin Reference | 643828 |
| KEGG | C12212 |
| MeSH | D020019 |
| PubChem CID | 24892870 |
| RTECS number | MK4825000 |
| UNII | 6Z1V6M3935 |
| UN number | UN3077 |
| CompTox Dashboard (EPA) | DTXSID3020172 |
| Properties | |
| Chemical formula | C8H10N4O2 |
| Appearance | Brown yellow powder |
| Odor | Characteristic |
| Density | 0.45 g/ml |
| Solubility in water | Soluble in water |
| log P | 0.33 |
| Acidity (pKa) | 4.90 |
| Basicity (pKb) | 8.7 |
| Magnetic susceptibility (χ) | Diamagnetic |
| Refractive index (nD) | 1.334 – 1.338 |
| Viscosity | Viscous liquid |
| Dipole moment | NA |
| Chemical formula | C17H26N4O9 |
| Appearance | Brown yellow to brown powder |
| Odor | Characteristic, faint odor |
| Density | 0.35-0.55 g/cm³ |
| Solubility in water | Soluble in water |
| log P | 1.85 |
| Acidity (pKa) | pKa 4.90 |
| Basicity (pKb) | 7.2 |
| Magnetic susceptibility (χ) | Diamagnetic |
| Refractive index (nD) | 1.331 ~ 1.421 |
| Viscosity | Viscous liquid |
| Thermochemistry | |
| Std molar entropy (S⦵298) | 302.07 J·mol⁻¹·K⁻¹ |
| Pharmacology | |
| ATC code | A13A |
| ATC code | A13A |
| Hazards | |
| Main hazards | Not hazardous. |
| GHS labelling | GHS07, Warning, Causes skin irritation. Causes serious eye irritation. |
| Pictograms | Eye irritant, Health hazard, Environmentally hazardous |
| Signal word | Warning |
| Hazard statements | No hazard statements. |
| Precautionary statements | Precautionary statements: If medical advice is needed, have product container or label at hand. Keep out of reach of children. Read label before use. |
| Lethal dose or concentration | Not established |
| LD50 (median dose) | LD50 (median dose) of Black Tea Extract: >2000 mg/kg (rat, oral) |
| PEL (Permissible) | 500 mg/kg |
| REL (Recommended) | 500 mg per day |
| Main hazards | May cause respiratory irritation. |
| GHS labelling | GHS07, Warning, H315, H319, H335 |
| Pictograms | Cosmos Natural, Cosmos Organic, Ecocert, China IECIC, EU Cosmetic, Fragrance Free, Gluten Free, Halal, Paraben Free, Vegan, Preservative Free |
| Signal word | No signal word |
| Hazard statements | No hazard statements. |
| Precautionary statements | Keep container tightly closed. Store in a cool, dry, and well-ventilated place. Avoid contact with eyes, skin, and clothing. Wash thoroughly after handling. Use personal protective equipment as required. |
| NFPA 704 (fire diamond) | NFPA 704: 1-1-0 |
| Flash point | >100°C |
| LD50 (median dose) | LD50 (median dose): 3,800 mg/kg (rat, oral) |
| PEL (Permissible) | 100 mg/kg |
| REL (Recommended) | 500 mg |
| Related compounds | |
| Related compounds |
Caffeine Theaflavin Thearubigin Epigallocatechin gallate (EGCG) Catechin Polyphenols Tannins |
| Related compounds |
Green Tea Extract White Tea Extract Oolong Tea Extract Pu-erh Tea Extract Tea Polyphenols Epigallocatechin Gallate (EGCG) Theaflavins Caffeine Catechins |