Vitamin Supplements

Recommended Daily Allowances for vitamin D are given here in both micrograms and international units. The IU is a common unit of measurement among many vitamin supplement manufacturers. Remember that people who get enough sunlight do not need additional vitamin D.

Vitamin D Optimal Daily Allowance

We recommend an optimal daily allowance of 400 IU of vitamin D per day. Fewer foods are rich in vitamin D than in other vitamins and minerals, so you may need to take a vitamin D tablet to supplement your diet. Read the rest of this entry »

Before you decide that you need to take vitamin supplements or change the way you eat, you should know where you stand and how much improvement you really need. To help you analyze your current diet, we’ve developed a system you can use to calculate your approximate vitamin D intake. Following is a list of vitamin D food sources, arranged according to the percentage of our Optimal Daily Allowance of vitamin D contained in them. Since 3 ounces of tuna canned in oil contain 197.2 IU of vitamin D and the ODA for vitamin D is 400 IUD, we’ve listed tuna in the 50 Percent category. Read the rest of this entry »