Vitamin A: uses and benefits

{vision, gene expression, reproduction, embryonic development, growth, immune function}

What is Vitamin A?


Vitamin D is a fat soluble vitamin obtained through diet. It includes retinol, retinyl palmitate, and beta-carotene.

There are two forms: Preformed vitamin A (retinol and retinyl ester) is derived from animal sources such as meat, dairy products, and fish. Provitamin A (beta-carotenoid) is derived from colorful fruits and vegetables.

Required for:

  • cell growth
  • immune function
  • Eye health
  • fetal development
  • skin health
  • response to inflammation
  • Helps reduce oxidative stress
  • protection against disease
  • male and female re-productivity


Toxicity can occur because of the long half-life of Vitamin A in the body. Toxicity symptoms include dry skin, headaches, anorexia, nausea, bone pain, and cerebral edema. Toxicity occurs when a very high dose of Vitamin A has been taken. Therefore you should always consult with your health care provider before taking Vitamin A supplementation for correct dosage.


Deficiency symptoms:

  • night blindness
  • xerophthalmia (dry eyes)
  • severely reduced immune competence
  • delayed growth
  • inflamed skin
  • infertility and trouble conceiving
  • respiratory infections
  • slow wound healing

Good Food sources

Food sources include: sweet potato, spinach, pumpkin and carrots, squash, watermelon, asparagus and broccoli amongst others.


The DNA Health Skin and DNA Core tests will tell you how well your body metabolises Vitamin A


  1. McEldrew EP, Lopez MJ, Milstein H. Vitamin A. [Updated 2023 Jul 10]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2023 Jan-. Available from:
  2. Debelo H, Novotny JA, Ferruzzi MG. Vitamin A. Adv Nutr. 2017 Nov 15;8(6):992-994. doi: 10.3945/an.116.014720. PMID: 29141980; PMCID: PMC5683001.

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