Tea: Nutrition, Pros & Cons
Tea (Camellia sinensis) is a widely consumed beverage rich in polyphenols and antioxidants like catechins and theaflavins. While it offers cardiovascular and metabolic benefits when consumed plain, its high tannin content can inhibit iron absorption, and traditional preparations with added sugars or heavy milk can alter its health profile.
Health conditions
- Caution for Anemia [ICMR-NIN]
- Good for Heart Disease [PubMed]
- Good for Diabetes [WHO, PubMed]
- Good for Gut Health [ICMR-NIN, PubMed]
- Good for Immunity [PubMed]
Pros
- Rich in polyphenols (such as flavonoids) which help reduce oxidative stress and systemic inflammation. [PubMed]
- Contains moderate amounts of caffeine which can temporarily improve alertness, cognitive focus, and metabolic rate. [PubMed]
Cons
- Tannins in tea can bind to non-heme iron in the digestive tract, significantly reducing its absorption from meals. [ICMR-NIN]
- Excessive consumption can lead to caffeine overload, potentially causing restlessness, anxiety, or sleep disturbances. [PubMed]
Key nutrients
- Polyphenols — Bioactive compounds including catechins (in green tea) and theaflavins (in black tea) with strong antioxidant properties.
- Caffeine — A natural central nervous system stimulant that enhances alertness and concentration.
- Tannins — Polyphenolic compounds that give tea its distinct astringent taste but can interfere with mineral absorption.