#vitamin A

• Antivitamin — A chemical substance or organic compound with a molecular structure similar to a vitamin, capable of blocking, competing with, or completely nullifying its specific biological and metabolic effects. Antivitamins most frequently act through competitive inhibition, occupying the active site of an enzyme or preventing normal intestinal absorption, being utilized experimentally in the laboratory or in therapy (such as methotrexate, an antifolate antivitamin used as a cytostatic).
• Antixerophthalmic — Preventing, combating, or curing xerophthalmia (the pathological dryness of the conjunctiva and cornea caused by a lack of tear secretion); it refers specifically to vitamin A (retinol) or to compounds that stimulate the trophicity of ocular mucosa, ensuring protection against tissue keratinization and the maintenance of normal visual acuity under low light conditions.
• Axeroftol — An alternative scientific name for vitamin A1 (retinol), a fat-soluble compound essential for maintaining the structural integrity of epithelial tissues, optimizing visual processes in low-light conditions, and boosting the immune system. This organic compound acts as a cellular protective shield, preventing xerophthalmia (corneal dryness) and promoting a profound, delicate regeneration of the skin and mucous membranes.