There’s growing awareness of rare, but potentially serious side effects from mega doses of vitamin B6, a nutrient found in supplements and energy drinks.

Vitamin D supplements are widely used for bone health and immunity, but excessive intake can lead to silent side effects. High calcium levels, kidney strain, digestive issues, mood changes, and bone ...

The co-founder of Repose Healthcare noted that symptoms can include 'constant thirst and needing the loo more often, ...

Medically reviewed by Jamie Johnson, RDN Key Takeaways Too much vitamin D can lead to harmful health effects, including high ...

You can’t absorb all of the vitamin C, but can only urinate it out if you take too much of it, or if it builds up and isn’t being released properly, you can get into serious trouble with your health.

Common side effects of too much vitamin D include nausea, skin reactions, stomach pain, and headaches, necessitating medical ...

Health experts warn that taking large amounts of vitamin C supplements can cause side effects ...

A new study found that vitamin D supplementation improved a key marker of biological aging—but it's probably too soon to rush to the drugstore. Here's what to know.