Deficiency/Toxicity and Terms

Vitamin A Deficiency

Infectious disease, night blindness, blindness, and keratinization

Vitamin D Deficiency

Rickets, osteomalacia, and osteoporosis (due to darker skin, breastfeeding, or lack of sunlight)

Vitamin E Deficiency

Cystic fibrosis and neuromuscular dysfunction

Vitamin K Deficiency

Impaired blood clotting

Preformed Vitamin A

Comes from animal sources like liver and is active

Pro-Vitamin A Keratinoids

Comes from plants like carrots that must be converted by the body to be active

Antioxidants

Neutralize free radicals by donating their own electrons

Antioxidant Vitamin E

Defends lipids

Antioxidant Vitamin C

Protects skin and blood