Algae protein is increasingly recognized for its potential benefits to eye health, primarily due to its rich content of bioactive compounds such as astaxanthin (in microalgae like Haematococcus pluvialis) and other carotenoids (e.g., lutein, zeaxanthin). These compounds have antioxidant properties that are thought to protect retinal cells from oxidative stress and light-induced damage, both of which are risk factors for age-related macular degeneration (AMD) and other eye disorders. Several small-scale studies and preclinical trials indicate that supplementation with algal-derived astaxanthin and lutein can improve retinal blood flow and reduce eye fatigue, though the evidence for direct clinical benefit in preventing or treating diseases remains limited.

While the protein component of algae itself does not appear to directly affect eye health, the presence of these carotenoids in certain algae-based supplements forms the basis of their use for supporting the visual system. Multiple reviews and meta-analyses highlight the protective effects of lutein and zeaxanthin, but most of this research is focused on these compounds rather than whole algae protein sources. Therefore, while there is a scientific rationale and some validation for algae-derived carotenoids in eye health, the evidence specific to algae protein as a whole is modest. Overall, algae protein is considered to have potential but is not yet strongly supported by large-scale clinical trials for eye health.