Herbal Choice Senna Tea in a box of 20 tea bags is a herbal infusion made from senna leaves — a herb with a long traditional history in herbal remedy use. The 40g pack contains tea bags ready to brew. Brew in freshly boiled water for 4 to 5 minutes. Caffeine-free. As with any herbal tea containing senna, follow the recommendations on the box and treat as part of a varied diet, not a substitute for medical advice; senna teas should not be drunk continuously over extended periods. Herbal Choice is a UK Caribbean tea brand at sensible prices.