• Does green tea burn fat? – Green tea contains caffeine and antioxidants called catechins (specifically EGCG), which can modestly boost metabolism and fat oxidation. However, it is not a magic solution and will not cause major weight loss on its own without a healthy diet and exercise.
• Is black tea stronger than coffee? – No, black tea is generally not stronger than coffee. An average 8-ounce cup of brewed coffee contains about 95 to 200 milligrams of caffeine, while the same amount of black tea typically contains only 40 to 70 milligrams.
• Can herbal tea contain caffeine? – Most herbal teas are naturally caffeine-free because they are made from dried fruits, flowers, spices, or roots rather than actual tea leaves. However, exceptions exist if a blend contains specific stimulant plants like yerba maté or guayusa, or if it is mixed with true tea leaves
• Does adding milk remove tea’s benefits? – Adding milk does not completely remove tea’s benefits, but it can reduce the availability of certain antioxidants. Milk proteins, particularly casein, bind to tea flavonoids (catechins and tannins). This binding action can slow down or decrease the absorption of these healthy compounds in your body, though many nutrients and some antioxidant activity remain.

Source: Holland & Barrett Driftaway Coffee Almsed Healthline