⚠️ 68% of supplement users have dangerous interactions they don't know about
Learn the 7 most dangerous supplement interactions and how to avoid them
Enter your supplements below to discover dangerous interactions, redundancies, and timing conflicts.
Calcium blocks iron absorption by 50%. St. John's Wort makes birth control ineffective. Your "healthy" routine could be harming you.
Taking 3 products with B12? You're absorbing only 10% and peeing out the rest. Average person wastes $73/month on redundant supplements.
Taking magnesium in the morning? It should be at night for sleep. Taking iron with coffee? You're absorbing almost nothing.
Taking Vitamin D without K2? Without magnesium? You need cofactors for absorption. Most stacks have critical gaps.
Magnesium oxide has 4% absorption. Glycinate has 80%. The form matters as much as the dose—but nobody tells you this.
Grapefruit + statins = dangerous. Vitamin K + blood thinners = risky. Your doctor doesn't track your supplements.
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