Black Tea
Camellia sinensis
Fermented tea with caffeine and polyphenols linked to heart and alertness benefits.
Traditional use (household): Fermented tea with caffeine and polyphenols linked to heart and alertness benefits.
Fermented tea with caffeine and polyphenols linked to heart and alertness benefits.
Active constituents are under study; evidence ranges from traditional use to preliminary human trials.
- Fermented tea with caffeine and polyphenols linked to heart and alertness benefits.
Evidence strength: limited human.
- See the evidence level above
- Caffeine content; tannins can reduce iron absorption.
- Pregnant/breastfeeding people without medical advice
Caffeine content; tannins can reduce iron absorption.
May interact with prescription medications — review with a clinician if you take any.
Use caution in pregnancy, breastfeeding, for children, and with chronic disease unless cleared by a clinician.
Choose reputable, tested suppliers; correct identification is essential for wild-harvested plants.