✨Vitamin A✨

in hive-120078 •  2 years ago 


💫Vitamin A is a fat soluble vitamin that comes in two forms: Retinoids and Carotenoids.

🌟Retinoids [Retinal, Retinol and Retinoid acid] are found in animal products, especially liver.

⚡️Carotenoids [eg. Beta-carotene] are found in plant foods, especially dark leafy greens and yellow/orange vegetables.

💥Each form performs different tasks in the body.

🥕Beta-carotene is a provitamin, this means it is transformed into one of the retinoids once it has been eaten. It can also act as an anti-oxidant, protecting the body against disease.

👁Retinal is very important for vision. Vitamin A deficiency can cause night blindness and xerophthalmia.

🧬Retinol supports sperm development ad cell maintenance. Vitamin A deficiency can cause infertility and keratinisation.

👶🏼Retinoid acid acts as a hormone and regulates growth, cell differentiation and embryonic development. Children deficient in Vitamin A do not grow properly.

🦠Vitamin A is also important for immune function.

💙The NHS recommends a daily intake of 0.7mg for men and 0.6mg for women.

☠️Vitamin A is mostly stored in the liver so there is a risk of toxicity if too much is consumed. Toxicity is rare but symptoms include bone defects eg. osteoporosis and birth defects if excess occurs during pregnancy.

Abrams et al. Manson's Tropical Infectious Diseases 23rd Ed.
Whitney and Rolfes. Understanding Nutrition 14th Ed.

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