Adults (18 years and older): As an antioxidant, in general, manufacturers recommend taking 4-8 milligrams of astaxanthin by mouth 2-3 times daily with meals. Clinical evidence is lacking. For dyspepsia, 40 milligrams of astaxanthin (AstaCarox®) has been taken by mouth daily in divided doses for four weeks. For exercise capacity, the manufacturers of Xanthin® recommend taking one capsule by mouth (each containing eight milligrams of astaxanthin) before and after physical activity. Four milligrams of astaxanthin has also been taken by mouth in the morning with food. For high cholesterol, 6, 12, and 18 milligrams of astaxanthin (AstaREAL® Astaxanthin) has been taken by mouth daily for 12 weeks. In healthy human subjects, 3.6, 7.2, and 14.4 milligrams has been administered in a beverage daily for two weeks. For male infertility, 16 milligrams of astaxanthin (AstaCarox®) has been taken by mouth daily for three months. For skin conditions, two milligrams of astaxanthin (Astavita AstaREAL® Astaxanthin; each capsule containing two milligrams of astaxanthin derived from Haematococcus plubialis
microalgae) has been taken by mouth twice daily with breakfast and dinner for six weeks. According to secondary sources, four milligrams of astaxanthin (BioAstin®) daily for two weeks may prevent sunburn. For transplant (renal), 12 milligrams of astaxanthin (BioAstin®; four milligram tablets taken by mouth three times daily) has been used for one year.
Note: Various seafoods contain the astaxanthin pigment. A standard serving portion of four ounces of Atlantic salmon contains from 0.5 to 1.1 milligrams of astaxanthin, whereas the same amount of sockeye salmon may contain 4.5 milligrams of astaxanthin.
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