We use four scientific criteria to compare multivitamin brands. We developed each criterion based on peer-reviewed evidence available in the latest published medical literature.
The four comparison criteria are as follows:
Composition is 25% of the final score.
Potency is 25% of the final score.
Bioavailability is 25% of the final score.
Safety is 25% of the final score.
From these four criteria, we calculate an Effectiveness Score. A score near 10 represents a supplement with the characteristics for optimal nutrition.
Conversely, a score near 0 represents a product possessing few, if any, of the characteristics for optimal nutrition.
The Optimal Daily Intake (ODI) represents the ideal quantities of vitamins and minerals individuals need to take each day according to the latest research in the area of nutritional supplementation.
Please note that these ODI values are higher than the current recommended daily allowance (RDA) or dietary reference intakes (DRI) as published by the U.S. Food and Nutrition Board. |
The RDA and DRI values are too low and not optimal for many nutrients.
The ODI includes the 26 essential ingredients, listed in the table below with their recommended daily dosage:
# | Vitamin/Mineral | Dosage |
---|---|---|
1 | Vitamin A (Beta carotene) | 5000 IU |
2 | Vitamin B1 (Thiamine) | 5 mg |
3 | Vitamin B2 (Riboflavin) | 5 mg |
4 | Vitamin B3 (Niacin) | 22 mg |
5 | Vitamin B5 (Pantothenic acid) | 15 mg |
6 | Vitamin B6 | 5 mg |
7 | Vitamin B7 (Biotin) | 350 mcg |
8 | Vitamin B9 (Folic Acid) | 400 mcg |
9 | Vitamin B12 | 12 mcg |
10 | Vitamin C | 200 mg |
11 | Vitamin D3 | 2000 IU |
12 | Vitamin E | 60 IU |
13 | Vitamin K2 (Menaquinone) | 150 mcg |
14 | Calcium | 1300 mg |
15 | Chloride | 3400 mg |
16 | Chromium | 120 mcg |
17 | Copper | 2 mg |
18 | Iodine | 150 mcg |
19 | Iron | 15 mg |
20 | Magnesium | 420 mg |
21 | Manganese | 2.3 mg |
22 | Molybdenum | 75 mcg |
23 | Phosphorus | 1250 mg |
24 | Selenium | 80 mcg |
25 | Vanadium | 75 mcg |
26 | Zinc | 15 mg |