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Harper Adams——Studied at the University of California, Los Angeles, Lives in Los Angeles, CA, USA.
The recommended form of
vitamin D is
vitamin D3 or cholecalciferol. This is the natural form of
vitamin D that your body makes from sunlight. Supplements are made from the fat of lambs' wool. However, a clinical study reported in 2008 suggested that
vitamin D2 works as well as
vitamin D3.
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