Although your body will store excess vitamin A, some research shows having more than 1.5mg a day over many years may weaken ...

Rare side effects can include diarrhea and excessive urination, but a more common side effect is Gatorade-colored urine: "Vitamin B2 supplementation is considered to be very safe," says Slavin.

The two types of water-soluble vitamins are vitamin C and B vitamins. Excess water-soluble vitamins ... B3 helps maintain normal nervous system function, and B2 keeps your skin and eyes healthy.

Vitamin B6 is important for your health, but too much can cause nerve damage and photosensitivity. Symptoms of nerve damage include numbness, tingling, muscle weakness, and reduced skin sensitivity.

Again, you’ll usually just pee out any vitamin B that your body doesn’t need. But you can still have side effects from taking too much vitamin B. Some potential side effects, according to ...

Your body needs vitamins A, C, D, E, K, and the eight B vitamins: thiamin (B1), riboflavin (B2 ... weak bones (vitamin D deficiency), muscle problems (vitamin E deficiency), or excess bleeding ...

B2: This nutrient, which is also called riboflavin ... But you can still have side effects from taking too much vitamin B. Some potential side effects, according to Cording, include: Taking too much ...