TISA REN is an herbal blend that helps maintain kidney health, presented in a convenient 140-gram bag format. Its preparation is simple: just boil one tablespoon of the herbal tea in 200 ml of water for 3 to 5 minutes, let it steep, strain, and serve. The recommendation is to consume it twice a day, in the morning and afternoon, and it can be sweetened to taste. The main ingredients include horsetail (Equisetum Arvensis), couch grass (Agropyron Repens P.b), sand spurrey (Spergularia Glabra L.), and bearberry (Arctostaphylos uva-ursi). However, it's important to note that this herbal tea should be avoided in cases of heart or kidney failure, in children under 12 years, as well as in people with hypertension or severe heart conditions. It's also advisable to consult a doctor if used concurrently with diabetes treatments.