Hi,
Astaxanthin has showed up in literature as a super antioxidant, 100-500 times the antioxidant capacity of Vitamin E and 10 times the antioxidant capacity of beta-carotene. It is present in some birds and salmon, being highest in sockeye salmon. Some literature data suggests its beneficial role in combating against acute renal toxicity in HgCls-fed aminal rat. Several clinical trials are ongoing in renal transplant subjects on testing cardiac advantanges., as well as on hemodialysis patients
There may be some potential of taking astaxanthin to help body through the reduction of cardiac overload, removal of reactive oxygen species (ROS) to attain longer vessel dilation, improvement of HDL/cholesteral ratio and modulation of immune system etc.
Astaxanthin can cross blood-brain barrier and it can populate in CNS and retinal membranes. Its use in eye health has been promising. However, long term safety studies on the use of astaxanthin in human trials is not yet available. Its use in kideny patients is also not reported yet, despites some positive thinking.
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Ref:
http://www.biomedcentral.com/content/pdf/1471-2369-9-17.pdf
http://www.ruscom.com/cyan/web02/pdfs/bioastin/batl09.pdf
http://www.cyanotech.com/pdfs/bioastin/axbul62.PDF
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