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Food sources don't pose Vitamin A toxicity issues. While too much vitamin A from supplements can be dangerous, beta-carotene (the natural form found in foods) doesn't pose such a risk. Additionally, the relative amount of Vitamin A found in foods as compared to a concentrated vitamin tablet is much, much less.
Vitamin A is fat soluble. This means that excess is stored in the body for longer periods of time. This also means that there is a greater risk of toxicity when eaten in large amounts.
African American
Vitamin A supplements should not be taken in conjunction with any retinoid medications, including isotretinoin (Accutane), a drug used to treat acne. There is a higher risk of toxicity.
yes.
Vitamins A and D
Elsa Nielsen has written: 'Toxicological risk assessment of chemicals' -- subject(s): Environmental Exposure, Environmental risk assessment, Hazardous substances, Health risk assessment, Methods, Prevention & control, Risk assessment, Standards, Toxicity, Toxicity testing, Toxicology
You run the risk of liver failure and toxicity
Rodney E Willard has written: 'Assessment of cadmium exposure and toxicity risk in an American vegetarian population' -- subject(s): Vegetarians, Toxicology, Cadmium
Vitamin A lowers the risk of nightblindness, decrease in vision, chronic malabsorption of lipids, and impaired bile production and release.
Vitamin E is believed to decrease the risk of cognitive decline in aging adults. It is an antioxidant that helps protect cells from damage, including those in the brain. Studies suggest that adequate levels of vitamin E may help preserve cognitive function as we age.