Also known as: Retinol, Beta-carotene, Retinyl palmitate
Latest evidence update: 2026-03-01
Outcome estimates are derived from published research and represent population-level associations, not guaranteed individual results. Consult a healthcare professional before making decisions based on these estimates.
Recommended: Varies by form and individual needs
ProtocolEngine provides general health information based on published research. This is not medical advice. Consult a healthcare professional before starting any supplement or health protocol.
Reduces childhood mortality and prevents blindness from vitamin A deficiency in children under five years old
Lowers risk of measles illness and may reduce preterm birth in healthy pregnant women
Reduces periodontitis risk and may lower stroke risk
High intake of vitamin A from supplements is associated with increased risk of hip fractures and bone breaks
Shows no clear benefit for preventing upper respiratory infections, colorectal cancer, breast cancer, or reducing HIV disease progression