Taking Too Much Of This Common Winter Supplement Could Be 'Harmful,' NHS Says

Though some vitamins, like vitamin D, are recommended by the NHS over the winter, the service stresses that other commonly-used supplements ― like vitamin C, garlic extract, and echinacea ― can’t actually prevent colds during flu season.

And though getting enough vitamin C is crucial to your skin, bone, and cell health ― too little of it can cause scurvy, which is on the rise in the UK ― the NHS adds that you can also have too much of a “good” thing.

The vitamin, which is present in a wide range of foods and many supplements...