Are you taking supplements correctly? Here’s a guide on their dosage limits

It’s a common misunderstanding that dietary supplements are entirely safe, experts say. Photograph: Daniel Grizelj/Getty Images

There are more than 100,000 supplements on the US market – capsules, powders, tablets and gummies sold to improve or maintain health. Supplements can contain vitamins, minerals, botanicals and amino acids on their own or in various combinations.

The consumption of these products is surging. But it’s a common misunderstanding that these products are entirely safe, says Dr Pieter Cohen, an internist and associate professor at Harvard Medical School. Excessive amounts of nutrients can cause health problems, so it’s critical to know whether you’re using the correct dosage of high-quality products.