Vitamin B12 is typically well-tolerated, but in very rare cases, there are serious side effects to be aware of. Learn more about them here.

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.

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.

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

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

Vitamin C is good for protecting cells and keeping them healthy, but you should be aware of some 'overdose' symptoms ...

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

Topical vitamin C and retinol both provide anti-aging benefits to your skin, and combining them may compound their effects, ...