Iso-Stak
by Universal · capsule · 60 capsules
- On the market (NIH)
- UPC 0 39442 05169 1
- DSLD label 37775
- Serving 1 capsule
- 60 servings
Iso-Stak by Universal lists 10 ingredients, 10 with an amount per serving of 1 capsule, such as 3.5 mg of vitamin B6, 10 mg of niacin, 10 mg of zinc and 100 mg of 5-methyl-7-methoxyisoflavone. Its current label entered the NIH Dietary Supplement Label Database on October 27, 2014.
What is in Iso-Stak?
Each row as the label prints it, per serving of 1 capsule. The capsule beside an amount places it among every product in the NIH database that lists the same ingredient: the bar is the middle half of their amounts, the line in it the median, the whiskers the 10th and 90th percentiles; the green tick is the FDA Daily Value and the red dashed tick the adult upper limit (IOM).
| Ingredient | Amount | % DV | Among products listing it |
|---|---|---|---|
| Vitamin B6 | 3.5 mg | 175% | 62% of 15,277 products listing vitamin B6 give more (median 6 mg). Per day at the most servings: 10.5 mg. |
| Niacin | 10 mg | 50% | 77% of 12,413 products listing niacin give more (median 20 mg). Per day at the most servings: 30 mg. |
| Zinc | 10 mg | 67% | 51% of 13,186 products listing zinc give more (median 11 mg). Per day at the most servings: 30 mg. |
| 5-Methyl-7-Methoxyisoflavone | 100 mg | ||
| 7-Isopropoxyisoflavone | 100 mg | 71% of 75 products listing ipriflavone give more (median 200 mg). Per day at the most servings: 300 mg. | |
| 5,7-Dihydroxyflavone | 25 mg | 96% of 78 products listing chrysin give more (median 100 mg). Per day at the most servings: 75 mg. | |
| {Beta}-Ecdysterone | 25 mg | ||
| Isoflavonol(TM) | 150 mg | Higher than 89% of 290 products listing isoflavones (median 50 mg). Per day at the most servings: 450 mg. | |
| Triboxybol(TM)as Steroidal SaponinsTriboxybol(TM) (Form: standardized for 29% Steroidal Saponins) | 200 mg | 61% of 555 products listing tribulus give more (median 300 mg). Per day at the most servings: 600 mg. | |
| Phosphatidylcholine | 10 mg | 95% of 403 products listing phosphatidylcholine give more (median 120 mg). Per day at the most servings: 30 mg. |
Source: NIH ODS Dietary Supplement Label Database, label 37775 (entered October 27, 2014), version 9.4.0. See the label on DSLD. Amounts are what the maker printed; DSLD does not test products. Daily Values: the FDA's Daily Value page.
Is that a lot?
The rows in the top or bottom tenth of the products that list the same ingredient, and any above the adult upper limit at the most servings a day the directions give:
- 96% of the 78 products that print an amount of chrysin list more than its 25 mg of 5,7-dihydroxyflavone (filed by NIH under chrysin) (median 100 mg).
- 95% of the 403 products that print an amount of phosphatidylcholine list more than its 10 mg of phosphatidylcholine (median 120 mg).
The NIH database records 3 servings a day from the label's directions; its % Daily Values are for adults and children 4 or more years of age. The directions as printed are further down this page.
The Tolerable Upper Intake Level is the most of a nutrient per day, from food, water and supplements together, that is likely to pose no risk for almost all adults (Institute of Medicine, 2011). It does not apply under medical supervision. This page compares labels; it is not medical advice.
Sources: amounts from the DSLD label; Daily Values from 21 CFR 101.9(c)(8)(iv); adult upper limits from the Institute of Medicine's DRI summary tables (2011). How positions are computed.
Which products have the closest formulas?
The products whose ingredient lists overlap most with Iso-Stak's, rare ingredients counting for more.
- IsoStakUniversal Nutrition · off the market 8 shared, 65% alike
Source: ingredient lists of every product's current label in DSLD (version 9.4.0); similarity weights each shared ingredient by how rare it is.
What does the label say about taking it?
Quoted from the label as DSLD transcribed it: the maker's words, including any claim about what the product does, which the FDA has not evaluated and PlainVitamins does not endorse.
- Directions
- DOSAGE: Take 1 capsules three times daily with meals. Do not exceed 3 capsules in any 24-hour period.
- Warnings
- Do not exceed 3 capsules in any 24-hour period.
- Do not take this if you have or are at risk for any medical condition or disease.
- Please consult with a physician before using this product, especially if you are using any prescription drug, over-the-counter medication, or supplements.
- Immediately discontinue use if any side effects occur. For State of California: this product contains a chemical known to the State of California to cause birth defects or other reproductive harm.
- For State of California: this product contains a chemical known to the State of California to cause birth defects or other reproductive harm.
- Keep out of reach of children.
- Athletes should consult with their sanctioning authority before use. Do not exceed recommended dose.
- Made in a GMP facility on equipment that processes milk, soy, egg, peanuts, tree nuts, fish, shellfish, and wheat.
- WARNING: This product is not for use by anyone under the age of 18.
- Allergens and what it does not contain
- Safe Non-Hormonal Formula
Source: label statements in DSLD label 37775.
What else is on the label?
Other ingredients: Tribulus terrestris extract, Dicalcium Phosphate, Pueraria lobata, Gelatin, Lecithin, Cyanotis vaga extract, Magnesium Stearate, Zinc Oxide, Niacinamide, Pyridoxine Hydrochloride.
How many labels does Iso-Stak have?
One label is on file, entered on October 27, 2014.
- Label 37775 (current) Entered October 27, 2014 · on the market · 60 capsules · UPC 0 39442 05169 1
DSLD also links this label to: IsoStak (image difference, same product).
Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).
Who makes it?
The label names Universal Nutrition (manufacturer), New Brunswick, New Jersey. All Universal products.