Contrast with virucide. Vitamins are crucial for many bodily functions including a healthy immune response. Excess vitamin A may be toxic to the liver. The vitamin is synthesized from beta carotene within the body. Deficiency results in poor healing, easy bruising and anemia.
Vitamin D is manufactured within the skin when exposed to sunlight.
Deficiency is uncommon, and may result in weak bones and kidney stones. Deficiency is rare, and may lead to peripheral neuropathy, poor balance and reduced reflexes. Alpha tocopherol and gamma tocopherol are 2 forms of the vitamin. The VPR protein is believed to play a role in HIV infectivity and pathogenesis. Other symptoms may include chronic diarrhea, fatigue, weakness and fever.