Tea 101
Tea Myths Debunked
Common tea myths debunked: green tea caffeine, tea dehydration, 30-second decaf trick, and more. Science-backed corrections for tea drinkers.
Introduction
The tea world is rich in tradition — and in persistent myths. Some are harmless folklore, but others lead to poor brewing choices, unnecessary purchases, or misleading health claims. Here are the most common myths, corrected by evidence.
Myth: Green Tea Has Less Caffeine Than Black Tea
Reality: There is no consistent caffeine difference between green and black tea categories. A shade-grown gyokuro (green) contains significantly more caffeine than a lightly brewed Ceylon (black). Caffeine content depends on bud-to-leaf ratio, brewing temperature, steep time, and leaf-to-water ratio — not oxidation level.
Myth: You Can Decaffeinate Tea at Home by Steeping for 30 Seconds
Reality: Studies show a 30-second steep removes only 5-15% of caffeine. Caffeine extraction follows a gradual curve, with approximately 70% extracted in the first 3 minutes of brewing. The 30-second rinse does not meaningfully reduce caffeine and wastes significant flavor and health compounds.
Myth: Tea Dehydrates You
Reality: Tea is a net hydrator. While caffeine has a mild diuretic effect, the volume of water in tea far exceeds any fluid loss. Multiple studies confirm that tea consumption contributes positively to daily hydration.
Myth: Herbal Tea Is Tea
Reality: Chamomile, rooibos, peppermint, and other herbal infusions contain no Camellia sinensis and are properly called tisanes. This distinction matters for health claims — studies on "tea" polyphenols apply to true tea, not herbal infusions.
Myth: Adding Milk Destroys Tea's Health Benefits
Reality: Research is mixed. Some studies show casein proteins bind with catechins, while others find no significant reduction in antioxidant absorption. If you enjoy tea with milk, the potential modest reduction in one benefit does not outweigh the overall health value of drinking tea regularly.
Myth: Expensive Tea Is Always Better
Reality: Price correlates with quality up to a point, then increasingly reflects rarity, branding, and speculation. A $30/100g Darjeeling can be extraordinary; a $300/100g competition lot is marginally better but ten times the price. The sweetest value spot for most drinkers is the mid-range.