 Now, our tea has no contraindications with any food, supplement, or medication. It's naturally caffeine-free and can be drank in any quantity throughout the day by anyone over the age of three. In my family, everyone from my 23-year-old son to my 89-year-old father drinks a tea all day, every day, instead of water. I just drink water three or four times a week when I get tired of drinking a tea.