Astaxanthin is another natural carotenoid in red color and is highly concentrated in algae. Sea foods such as salmon, lobster, red trout and even flamingos turn to red-orange color in various degree when they are fed on algae. Scientists believe Astaxanthin gives salmon the endurance to swim miles and jumps over several-foot rapids. Astaxanthin is also found in the front of eye, where it supports the endurance of ciliary muscle that controls the eye to focus on objects that are at a distance or are nearby. Astaxanthin is found to relieve eye fatigue and improve the tear break time in clinical studies.*