Can I combine sunlight exposure and vitamin D intake to increase my vitamin D level?
To achieve an optimal vitamin D level, it is advisable to combine sunlight exposure and vitamin D intake. Here is an example for people with MS who are ambulant or who are disabled. The ambulant (low disability) group had no disability or could walk an unlimited distance without rest but not run. Table 1. Recommendations for Tasmanians with Multiple Sclerosis to prevent vitamin D deficiency. Source: Van der Mei IA. Information on Vitamin D levels for People with Multiple Sclerosis. Menzies Research Institute, 2007. Back to FAQ • How long will it take to increase my vitamin D level? Since the half-life of 25(OH)D in the circulation is quite long (190), results of treatment may only be assessed after 3 to 6 months or more when a plateau is reached (56) For example taking vitamin D3 400 IU/d or 800 IU/d resulted in an increase mean serum 25(OH)D from 24 nmol/L to 60 or 70 nmol/L, respectively, after 3 months. The increase in serum 25(OH)D also depends on baseline serum 25(OH)D. Source: Li
