Dry Eyes/Mucous Membranes

High doses or prolonged use of Vitamin A, especially orally, can cause dry eyes and other mucous membrane dryness. Topical retinal is less likely to cause this side effect than oral Vitamin A.

Excessive intake or prolonged use of Vitamin A, particularly oral forms, can lead to dryness of the eyes and other mucous membranes, such as the nasal passages and mouth. This occurs because Vitamin A plays a role in the health and maintenance of epithelial tissues, and imbalances can disrupt their proper function. Symptoms include gritty or burning sensation in the eyes, blurred vision, increased light sensitivity, and discomfort. Dryness of other mucous membranes may manifest as nosebleeds or a dry mouth and throat. Topical Retinal is less likely to cause systemic side effects like dry eyes compared to oral Vitamin A.