No side effects of high-dose beta carotene have been observed in standard toxicity studies in experimental animals. Doses for acute toxicity (up to 5000 mg/kg body weight per day) and for chronic toxicity (up to 1000 mg/kg body weight per day for life) showed no ill effects in rats.

Some carotenoids can break down into vitamin A, a nutrient that protects against premature skin damage from sun exposure. Both are risks for melanoma, premature wrinkles, and unhealthy skin.

Beta-carotene doesn’t seem to be toxic in large doses. But high doses over a long time can lead to carotenemia. This causes your skin to become yellowish orange. Too much beta-carotene is a problem for some people.

These people took 50 mg of beta-carotene every other day for 12 years. If you smoke or have a history of smoking or asbestos exposure, you should not take large amounts of beta-carotene supplements for long periods of time.

Share on Pinterest Vitamin D may help the lungs function better.

• Studies have suggested that many people with COPD have low vitamin D, and that taking vitamin D supplements helps the lungs function better.
• Researchers have linked low levels of vitamin C to increases in shortness of breath, mucus, and wheezing.

Beta-carotene (β-carotene) is a precursor to vitamin A, an essential vitamin at any age, including for cellular health and vision. It is also a powerful antioxidant that may reduce the risk of cancer. Beta-carotene is a precursor to vitamin A. It turns into vitamin A according to the body’s needs.

Risks. Don’t take more than the RDA of vitamin A unless your doctor recommends it. High doses of vitamin A have been associated with birth defects, lower bone density, and liver problems. People who drink heavily or have kidney or liver disease shouldn’t take vitamin A supplements without talking to a doctor.

Most people with vitamin A toxicity have a headache and rash. Consuming too much vitamin A over a long period of time can cause coarse hair, partial loss of hair (including the eyebrows), cracked lips, and dry, rough skin. Chronic consumption of large doses of vitamin A can cause liver damage.

Since too much vitamin A can be harmful, consult with your doctor before taking vitamin A supplements. Vitamin A toxicity may cause symptoms, such as liver damage, vision disturbances, nausea and even death. High-dose vitamin A supplements should be avoided unless prescribed by your doctor.

The vitamins A, D, E and K are fat soluble, which means they can be stored in the body. Taking high doses of these vitamins, especially vitamin A, over a long period of time can result in harmful levels in the body unless you have a medically diagnosed deficiency.

Yes, overdoing vitamins and nutritional supplements can cause hair loss. In addition to excessive selenium, taking too much Vitamin A can also cause hair loss.

Although too much dietary vitamin C is unlikely to be harmful, megadoses of vitamin C supplements might cause:

• Diarrhea.
• Nausea.
• Vomiting.
• Heartburn.
• Abdominal cramps.
• Headache.
• Insomnia.

In most cases, breakage is also reversible with a few changes to the products you’re using and how you handle your hair. If you’re experiencing damage now or have in the past, don’t fret. Here are some helpful tips and treatment options to teach you how to stop hair breakage and make your hair strong once more.