Eggs are a solid source of vitamin D, but many foods like cod liver oil, rainbow trout, and fortified milk contain higher levels of this important nutrient.

Taking too much vitamin D can cause serious side effects. Learn the signs, why you might feel weird after taking it, and when to talk to your healthcare provider.

Medically reviewed by Patricia Mikula, PharmD Key Takeaways Most adults can safely take vitamin D supplements every ...

Low levels of vitamin D seem to raise your risk of heart attack but scientists are still figuring out why—and whether ...

Learn the best time to take vitamin K2, why it absorbs better with fat, and how it supports bone and heart health when paired with vitamin D.

Experiencing tiredness, feeling moody or noticing that your nails keep cracking easily. Here is what these signs mean and how ...

This winter, medical experts guide you through the latest diagnostic standards, the non-deficiency causes of fatigue, and the practical steps you can take ...

Susan Weiner, MS, RDN, CDN, CDCES, FADCES, talks with Courtney Cameron, PharmD, BCACP, about widespread availability of ...

Although these findings are exciting, it’s too early to start popping high-dose vitamin D in the hope of slowing ageing. The ...

Fact checked by Nick Blackmer Vitamin D is vital, but taking in too much from supplements can be harmful.Vitamin D toxicity can cause common symptoms like nausea, weakness, and loss of ...

As we enter our 50s, it's time to reassess our intake of calcium, which helps mitigate bone loss, and vitamin D, which helps us absorb calcium.

In this guide to popular supplements, find out whether magnesium, probiotics, and other products work and what might be ...