Can I take supplements with coffee or tea?
Yes, the USANA Nutritionals can be taken with coffee or tea.
Caffeine at typical intakes (~300 mg/day or less) has no known negative impact on vitamin absorption and retention. This means that as long as coffee intake is no more than 2-3 cups per day, nutrient absorption should be largely unaffected. At intakes above this level, caffeine may contribute to disrupted sleep patterns and withdrawl symptoms, which can – along with other factors – negatively impact vitamin absorption.
There is some indication that tannins (polyphenolic compounds) found in coffee and tea can interfere with iron absorption, but as USANA does not currently offer an iron supplement, this is not typically a cause for concern.
