Antibiotics and iron
Taking antibiotics—especially those in the tetracycline family—along with iron supplements can dampen the effects of the antibiotics, making them less likely to work, Dr. Glatter says. Spacing out the two will help.
Next, be sure to check out these vitamin mistakes you might not know you’re making.
Magnesium and calcium
When these minerals are taken at the same time, they may not be quite as effective, says Tod Cooperman, MD, president of consumerlab.com, an independent testing company focused on health and nutrition products in White Plains, New York. “Taking large amounts of minerals with other minerals will reduce absorption,” he says. In essence, the minerals compete with one another and both lose out. Maximize your benefits by taking any mineral supplements at least two hours apart. This is one of the six things you should know before you begin taking magnesium supplements.