Vitamin D3 can be synthesised by humans through the skin upon exposure to sunlight. Due to the winter, weather conditions and sunblock, your body’s ability to produce enough vitamin D may be hindered. 

These factors emphasise the importance of taking vitamin D supplements. Vitamin D has long provided significant support for healthy bone density. 

Along with it, vitamin D has been proven to play a role in regulating healthy proliferation and on immunity. Research findings link a deficiency of vitamin D to many common age-related problems.

Current levels of vitamin D are very low in humans. Prominent nutritional scientists advise to increase the daily intake to 1,000 and 10,000 IU for adults. Life Extension recommends that healthy adults supplement each day with at least 2,000 IU of vitamin D. 

Elderly adults may benefit from higher doses such as 5,000 IU daily up to 10,000 IU daily. The objective of taking a vitamin D supplement is to achieve an optimal vitamin D level in the blood. Vitamin D is contained in the multi-nutrient Life Extension Mix and the multivitamin Two-Per-Day Tablets. 

A vitamin D blood test can help you determine the additional amount of vitamin D you may need to supplement to achieve an optimal level. For most people, this 1,000 IU potency is insufficient to attain optimal vitamin D blood levels. 

For smaller individuals who obtain 2,000-3,000 IU in their multi-nutrient formulas (and children), this potency of vitamin D may be suitable.