Which? looked at Vitamin D, Vitamin A, Vitamin B6 and Zinc supplements listed for sale on popular online marketplaces.

Your body can't produce vitamin B12 on its own, so getting it from your diet is important. If you're just starting to study it, we'll help you understand it further.

Medically reviewed by Lindsay Cook, PharmD High blood pressure (hypertension) is a condition that affects more than one ...

Vitamin D2 supplements may negatively impact circulating levels of vitamin D3 and negate the latter's potential benefits, ...

“However, we discovered that vitamin D2 supplements can actually decrease levels of vitamin D3 in the body, which is a previously unknown effect of taking these supplements. This study suggests that ...

Pregnant people. They’re encouraged to take prenatal vitamins, a type of multivitamin which typically includes B vitamins, calcium, iron, and more, King says. Doctors recommend these vitamins for ...

A study found that daily vitamin D supplements helped slow telomere shortening—the cellular process linked to aging and ...

Taking vitamin D2 may lower vitamin D3 levels, suggesting the two forms aren’t interchangeable. Vitamin D3 appears more effective for maintaining healthy vitamin D levels in the body. Few foods ...

A new vitamin K-based treatment could help replenish lost neurons in Alzheimer's patients, offering hope for slowing ...

Researchers analyzed 11 trials with 655 adults and discovered that taking vitamin D2 supplements decreases the body's vitamin ...

Certain prescription and over-the-counter medications, and even some other health supplements, can interact with omega-3s.

Since vitamin D accumulates in the body, taking a high-dose supplement may lead to vitamin D toxicity. This causes nausea, vomiting, and weakness.