Estrogen Blocker
by Iron Brothers Supplements · capsule · 60 capsules
- On the market (NIH)
- UPC X001RVGBZF
- DSLD label 263521
- Serving 2 capsules
- 30 servings
Estrogen Blocker by Iron Brothers Supplements lists 4 ingredients, 4 with an amount per serving of 2 capsules, such as 300 mg of tribulus terrestris, 150 mg of grape seed extract, 75 mg of indole-3-carbinole and 5 mg of bioperine. Its current label entered the NIH Dietary Supplement Label Database on May 19, 2022.
What is in Estrogen Blocker?
Each row as the label prints it, per serving of 2 capsules. 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 |
|---|---|---|---|
| Tribulus terrestrisas Saponins | 300 mg | ||
| Grape seed extractas Proanthocyanidins | 150 mg | Higher than 77% of 1,900 products listing grape (median 50 mg). | |
| Indole-3-Carbinole | 75 mg | 71% of 100 products listing indole-3-carbinol (I3C) give more (median 150 mg). | |
| Bioperineas Black Pepper fruit extract | 5 mg | 33% of 2,363 products listing black pepper give more (median 5 mg). |
Source: NIH ODS Dietary Supplement Label Database, label 263521 (entered May 19, 2022), version 9.4.0. See the label on DSLD or its label image (PDF). Amounts are what the maker printed; DSLD does not test products. Daily Values: the FDA's Daily Value page.
Is that a lot?
Every amount on this label with a position sits within the middle 80% of the products that list the same ingredient.
The NIH database records one serving 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 Estrogen Blocker's, rare ingredients counting for more.
- Indole-3-Carbinol 200 mg plus BioperineZazzee Naturals 2 shared, 40% alike
- Tribulus Terrestris Extract 500 mgSwanson 1 shared, 37% alike
- Tribulus Terrestris 450 mgTerraVita Premium Collection 1 shared, 37% alike
- Tribulus Terrestris (Puncture Vine) 4:1 Extract 450 mgTerraVita Premium Collection 1 shared, 37% alike
- Tribulus terrestris Extract (Puncture Vine) (40% Saponins) 450 mgTerraVita Premium Collection 1 shared, 37% alike
- Tribulus Terrestris Extract (Puncture Vine) (40% Saponins) PowderTerraVita Premium Collection 1 shared, 37% 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
- Directions Take (2) capsules daily with food. Do not exceed 8 weeks of continuous use without a 4 week off period.
- Warnings
- Warnings Not for use of persons under the age of 18. Keep out of reach of children.
- Consult your doctor prior to use if you have any medical conditions or if you are taking any other medications.
- Discontinue use immediately if you experience rapid heartbeat, dizziness, vomiting or other similar symptoms. Do not use if safety seal is damaged or missing.
- Storage
- Store in a cool, dry place.
Source: label statements in DSLD label 263521.
What else is on the label?
Other ingredients: Hypromellose, Brown Rice Flour.
Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): GMP Compliant Good Manufacturing Practice Made in the U.S.A.
How many labels does Estrogen Blocker have?
One label is on file, entered on May 19, 2022.
- Label 263521 (current) Entered May 19, 2022 · on the market · 60 capsules · UPC X001RVGBZF
Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).
Who makes it?
The label names Iron Brothers LLC (distributor), Las Vegas, NV. All Iron Brothers Supplements products.