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Pure Vitamins UK Vitamin D3 + K2 tablets, 4000 IU D3 (cholecalciferol) with K2 MK-7 supplement packaging

Vitamin D3 vs D2 (and the Signs of Low Vitamin D)

Vitamin D3 vs D2 (D3 is the more effective form), why the 'signs' of low vitamin D are too non-specific to self-diagnose (a GP blood test is the honest route), why deficiency is common in UK winters, and vitamin D's authorised roles.

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