The supplements you shouldn’t take with coffee — you’re flushing them down the toilet

“Practical advice would be: If you’re taking iron, do it at least one to two hours away from coffee. Vitamin C can help ...
Verywell Health on MSN

3 Supplements to Avoid Mixing With Vitamin C

Some supplement manufacturers also caution that vitamin C may chelate copper, meaning it could reduce how well the mineral is absorbed. If you take both supplements, it may help to avoid large doses ...