4 ms·
The best way is to get monthly blood tests and measure your serum levels of vitamin D. You can then adjust your dose accordingly. For me, light skinned in the n
by partyboat1586 6y ago
The best way is to get monthly blood tests and measure your serum levels of vitamin D. You can then adjust your dose accordingly. For me, light skinned in the northern hemisphere I need 4000IU keep my labs above 50.