| abstract |
A carotenoid substance called zeaxanthin, when ingested orally at suitable dosages such as 30 to 100 mg/day for a span of 1 to 2 weeks, can provide effective protection against sunburns, and can; give skin a darker tint that emulates a healthy suntan. In tests involving adults, it was found that zeaxanthin dosages of 30 to about 80 mg per day were sufficient to induce: (i) a mild but noticeable tinting, shading, or darkening of skin color, comparable to a mild suntan; (ii) a substantial increase in the person's ability to withstand elevated levels of sun or UV exposure without any subsequent pain or discomfort, and without the subsequent peeling and flaking that characterizes sunburns; and, (iii) an increased ability of reddened and sunburned skin to convert into intact skin that looks browned and healthily tanned. By reducing the amount of exposure to sunlight (or tanning lights) that are required to achieve a desired level of tanning, zeaxanthin can reduce the risks of skin cancer, premature aging or wrinkling, and similar skin problems. Since zeaxanthin also has retina-protecting properties and reduces the risk of a disease called macular degeneration, oral ingestion of these dosages of a zeaxanthin to enhance a tanned appearance and/or to protect against sun damage is believed to pose no health risks, and can offer several benefits due to the anti-oxidant and other activities of zeaxanthin. |