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Both Vitamin D2 and D3 are available as supplementsD3 is produced on the surface of the skin in response to ultraviolet light, or from egg yolk or fatty fish (supplementation with D3 oil in doses from 1000 IU may be beneficialhigher doses can lead to nausea, vomiting, frequent urination, and kidney stones)
Besides, it is supposed to undergo third-party testing in labs like Eurofins or SGS
Returns are accepted on unused, unopened items within 14 days of delivery
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Anal Biochem 150:7685 Srivastava A, Zeiger E (1995) The inhibitor of zeaxanthin formation, dithiothreitol, inhibits blue-light stimulated stomatal opening in Vicia faba
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