Vitamin A Blood Test

The Vitamin A Blood Test measures serum retinol levels to assess vitamin A status using a simple at-home dried blood spot sample.

Vitamin A is a fat-soluble nutrient essential for immune function, vision, epithelial integrity, and cellular differentiation. Retinol plays a central role in maintaining healthy skin and mucosal barriers, supporting night vision, and regulating gene expression involved in growth and tissue repair. Because vitamin A influences immune resilience and inflammatory balance, both deficiency and excess can impact overall health.

The Vitamin A Blood Test provides clinically relevant insight into vitamin A levels, helping identify suboptimal status or potential imbalance. Low retinol levels may be associated with impaired immune response, reduced visual adaptation in low light, and compromised epithelial health. Conversely, excessive vitamin A intake from supplementation may lead to toxicity, making objective measurement important for safe optimisation.

Monitoring vitamin A status can be particularly valuable for individuals following restricted diets, those with digestive conditions affecting fat absorption, or individuals using high-dose multivitamins or cod liver oil. Since vitamin A is transported with lipids, its levels may also reflect broader fat-soluble nutrient balance.

All samples from the Vitamin A Blood Test are analysed in certified laboratories and include clear reference ranges to support informed dietary and supplementation decisions. This at-home Vitamin A Blood Test provides a convenient and reliable method to assess fat-soluble vitamin status and support long-term nutritional health optimisation.