But if you can’t get to a health food shop or gym to chat about your needs with people in the know, how do you work out what you really need? And how do you separate the good quality stuff from the pointless tablets?

What to look for in a vitamin supplement

Because there’s so little regulation of the online supplement market, BDA-registered dietitian Sophie Medlin, points out, it’s really up to you to do your research or consult a dietician. “Think carefully about what you are looking for from your supplements and do some reading about the food sources of the nutrients you are buying and any potential side effects of supplementation. You’ll also want to look at the brand you’re buying from and if they have credible experts on their development team.”

Everyone is different, which means that there’s no one-fits-all tablet. Someone who follows a fully plant-based diet might want 100% of their recommended daily allowance of vitamin B12 in supplement form because it’s hard to get it entirely from fortified foods. The NHS recommends everyone take a vitamin D supplement during the colder months as it’s difficult to metabolise enough of the sunshine vitamin when it’s overcast, but some people may find that they need to take a supplement all year long. Women also require more iron during their fertile years than after the menopause. So, it really is about knowing your own needs.

One thing is for sure: not all supplements are the same. Quality varies vastly.

Vitamin supplements: your guide to taking and buying vitamins