Comparison
Optimum Silver and Extend Plus
Optimum Silver (Vitamin Research Products) lists 41 distinct ingredients and Extend Plus (Vitamin Research Products) 40 (rows of one ingredient counted once); 33 are on both labels. On the site's similarity measure, which compares ingredient lists (1 for the same list, rarer ingredients counting for more; amounts are not part of it), the two formulas score 0.59.
| Ingredient | Optimum Silver | Extend Plus |
|---|---|---|
| Vitamin C | 200 mg (222%) | 1,000 mg (1111%) |
| Calcium | 100 mg (8%) | 200 mg (15%) |
| Vitamin B6 | 12.5 mg (735%) | 50 mg (2941%) |
| Vitamin D | 15 mcg (75%) | 12.5 mcg (63%) |
| Magnesium | 100 mg (24%) | 200 mg (48%) |
| Vitamin B12 | 500 mcg (20833%) | 250 mcg (10417%) |
| Zinc | 12.5 mg (114%) | 7.5 mg (68%) |
| Niacin | 50 mg (313%) | 125 mg (781%) |
| Vitamin E | 100 IU | 200 IU |
| Folate | 200 mcg | 200 mcg |
| Vitamin A | 4,000 IU | 4,000 IU |
| Pantothenic Acid (Vitamin B5) | 50 mg (1000%) | 0.25 mg (5%) |
| Riboflavin | 7.5 mg (577%) | 37.5 mg (2885%) |
| Thiamin | 10 mg (833%) | 65 mg (5417%) |
| Biotin | 300 mcg (1000%) | 375 mcg (1250%) |
| Chromium | 100 mcg (286%) | 100 mcg (286%) |
| Selenium | 75 mcg (136%) | 100 mcg (182%) |
| Manganese | 1.25 mg (54%) | 1.25 mg (54%) |
| Copper | 0.5 mg (56%) | 0.5 mg (56%) |
| Iodine | 75 mcg (50%) | 75 mcg (50%) |
| Choline | not disclosed | 125 mg (23%) |
| Vitamin K | 125 mcg (104%) | 75 mcg (63%) |
| Molybdenum | 100 mcg (222%) | 50 mcg (111%) |
| Inositol | 37.5 mg | 100 mg |
| Boron | not disclosed | 1.5 mg |
| Alpha Lipoic Acid | 50 mg | 25 mg |
| Lutein | 1.5 mg | 1.5 mg |
| Vanadium | not disclosed | 50 mcg |
| Lycopene | 1.5 mg | 1.5 mg |
| N-Acetyl Cysteine | 150 mg | 200 mg |
| Rutin | 15 mg | 100 mg |
| Acetyl L-Carnitine | 75 mg | 50 mg |
| Hu Zhang | not disclosed | 25 mg |
| Potassium | 50 mg (1%) | |
| Green Tea | 50 mg | |
| Proteolytic Enzymes (Proteases) | not disclosed | |
| Flavonoid | 50 mg | |
| Lipase | not disclosed | |
| Amylase | not disclosed | |
| Quercetin | 25 mg | |
| Cellulase | not disclosed | |
| Lactase | not disclosed | |
| Silicon | not disclosed | |
| Deanol | 50 mg | |
| Vinpocetine | 5 mg | |
| Bamboo | 12.5 mg | |
| Gamma oryzanol | 7.5 mg | |
| Inositol nicotinate | 100 mg |
Amounts are per serving as DSLD gives them: Optimum Silver, 3 capsules; Extend Plus, 6 capsules. Current labels entered June 2014 and June 2014. Percentages of the Daily Value from 21 CFR 101.9. Source: NIH ODS Dietary Supplement Label Database.
Each product on its own
- Optimum SilverVitamin Research Products: every row against all products listing it
- Extend PlusVitamin Research Products: every row against all products listing it