The Best Form of Vitamin of D-3 is Sunlight. However, most people are unable to get enough exposure to sunlight to provide them with adequate levels of D-3 and living in a sunny climate does not guarantee against vitamin D-3 deficiencies.
The elderly are more prone to this deficiency since their capacity to activate vitamin D in the skin is reduced as we age.
The high rates of Vitamin D-3 deficiencies in the US has prompted the FDA to increase their daily recommended allowance of D-3 from 100 IUs (International Units) per day to a daily recommendation of 400-600 IUs per day, while many doctors and health professional recommend an average daily intake between 4000-10000 IUs of Vitamin D-3 per day.
BOOMER Vitamin D3 provides 5,000 IU's per capsule of High Quality all Natural Liquid Vitamin D3
When visiting your doctor ask to have D-3 added to the list of items for your blood work as it is not normally included in routine blood tests. Ideally, your level should be around 50.