When to take vitamins and what to combine

Simple rules:

• With food: multivitamins, vitamins D, A, E, K, omega-3 (fat-soluble).
• Morning: B vitamins, anything with caffeine.
• Evening: magnesium, ZMA, casein, melatonin.
• Iron — with vitamin C, 2 hours apart from tea, coffee, milk and calcium.
• Calcium, iron, zinc — apart from each other (they compete for absorption).
• Creatine, protein — timing doesn't matter, consistency does.

If you take medication (especially blood thinners, thyroid hormone, antibiotics), agree supplements with your doctor.