Synopsis

Source of validity: Scientific
Rating (out of 5): 3

Algae, particularly microalgae such as Chlorella, Spirulina, and marine algae like Dunaliella salina, are sources of nutrients that support eye health. The primary scientific rationale for their use relates to their high content of carotenoids such as beta-carotene, lutein, and zeaxanthin. These carotenoids are well-established for their protective role in ocular tissues; lutein and zeaxanthin accumulate in the macula and help filter blue light, reducing oxidative stress and potentially lowering the risk of age-related macular degeneration (AMD).

Several studies have demonstrated that supplementation with lutein and zeaxanthin can improve macular pigment density and visual function. Algae, especially Dunaliella salina, are among the richest natural sources of beta-carotene, while some green algae provide lutein and zeaxanthin. However, the evidence supporting algae as a direct intervention for eye health is mostly extrapolated from the known benefits of these carotenoids, rather than from large, direct clinical trials using whole algae supplements. Despite this, the bioavailability of these nutrients from algal sources is good, and algal-derived carotenoids are widely used in nutritional supplements targeting eye health.

In summary, while the traditional use is less prominent, scientific evidence for the eye-supporting properties of specific carotenoids found in algae is strong. However, the direct evidence for whole algae supplementation is moderate, resulting in a mid-level rating.

More about Algae (unspecified)
More about Eyes

Other ingredients that support Eyes

Other body systems supported by Algae (unspecified)

Products containing Algae (unspecified)