Prevagen® Extra Strength Brain Health Supplement Vitamin D / Apoaequorin 50 mcg - 20 mg Strength Capsule 30 per Bottle (1232020_BT) 1/BTApoaequorin is a protein extracted from a species of jellyfish called Aequorea victoria; this protein is notable for its ability to bind calcium ions and emit blue light when it does so Apoaequorin has gained attention as a dietary supplement for brain health, specifically for improving and cognitive function, particularly in aging populations Each Prevagen capsule contains 10 mg of apoaequorin plus 50 mcg of vitamin D (as cholecalciferol): Capsules