The tea shrub came originally from India and China. Today it is widely grown in the highlands of Southern Asia.
Use: Leaf buds and young leaves are picked, then fermented and dried in a complicated process. Out of the dried and crushed leaves an infusion is prepared.
Active constituents: Caffeine and theophylline, a substance, that is effective against angina pectoris and also used against asthma, but found in tea rather in trace amounts. Besides that, tea contains a higher percentage of tannins than coffee.
Effects: Tea acts, just like the other caffeine-containing drugs, measurably stimulating and efficiency-increasing on mind and body. Due to the higher content of tannin, as compared to coffee, the effect in tea occurs a bit later and not as distinct. On the other hand it lasts longer and goes on more regularly.
Side Effects: Long lasting overuse can lead to nervousness, sleeplessness and circulatory problems. Regular caffeine use can become a habit; but that is rather harmless.
Miscellaneous: My own coffee abuse for years had given me at last a gastric as well as a duodenal ulcer. Since I switched over to tea both are healed, and I don’t need to take antacid medicaments any longer, which I needed before in masses.
Suppliers: Teashops, herbal stores, groceries.