Ferrous Sulfate 325 mg
by Marlex Pharmaceuticals · tablet or pill · 100 tablets
- On the market (NIH)
- UPC 3 10135 16101 0
- DSLD label 263374
- Serving 1 tablet
- 100 servings
Ferrous Sulfate 325 mg by Marlex Pharmaceuticals lists 4 ingredients, 4 with an amount per serving of 1 tablet, such as 65 mg of iron, 11.04 mg of calcium, 0.21 mg of magnesium and 0.006 mg of potassium, beside 1 Nutrition Facts row (calories, fat and the like). Its current label entered the NIH Dietary Supplement Label Database on November 19, 2021.
What is in Ferrous Sulfate 325 mg?
Each row as the label prints it, per serving of 1 tablet. 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 |
|---|---|---|---|
| Ironas dried Ferrous Sulfate | 65 mg | 361% | Higher than 98% of 6,910 products listing iron (median 5 mg). 1.4 times the adult UL a day. |
| Sodium | 0.83 mg | over 99% of 14,514 products listing sodium give more (median 55 mg). | |
| Calcium | 11.04 mg | 1%* | 96% of 17,831 products listing calcium give more (median 115 mg). |
| Magnesium | 0.21 mg | 0%* | over 99% of 14,003 products listing magnesium give more (median 86 mg). |
| Potassium | 0.006 mg | 0%* | This amount is far outside what other labels list for potassium, or disagrees with the label's own %DV: possibly a unit or transcription slip in the database. Check the label image on DSLD. |
* % Daily Value computed from the printed amount and the FDA Daily Value (21 CFR 101.9); the label prints none for that row.
Source: NIH ODS Dietary Supplement Label Database, label 263374 (entered November 19, 2021), 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?
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:
- At 1 serving a day, the most its directions give, the label lists 65 mg of iron, 1.4 times the adult Tolerable Upper Intake Level.
- 96% of the 17,831 products that print an amount of calcium list more than its 11.04 mg of calcium (median 115 mg).
- over 99% of the 14,003 products that print an amount of magnesium list more than its 0.21 mg of magnesium (median 86 mg).
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.
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: Age - Dosage Adults and children 12 years of age and over - Take one tablet daily, preferably after a meal, or as directed by a physician. Children under 12 years of age - Consult a physician. Do not chew or crush tablet.
- - Use by expiration date on package
- Warnings
- Warnings: Since oral iron products interfere with absorption of oral tetracycline antibiotics, these products should not be taken within two hours of each other.
- Iron-containing products may cause constipation or diarrhea.
- As with any dietary supplement, if you are pregnant or nursing a baby, seek advice of a health professional before using this product.
- Warning: Accidental overdose of iron-containing products is a leading cause of fatal poisoning in children under 6. Keep this product out of reach of children. In case of accidental overdose, call a doctor or poison control center immediately.
- Storage
- Other information: - Store in a cool, dry place at controlled temperature 15-30 degrees C (59-86 degrees F) - Protect from moisture - Store in original container for better identification
Source: label statements in DSLD label 263374.
What else is on the label?
Other ingredients: Microcrystalline Cellulose, Dibasic Calcium Phosphate Dihydrate, Anhydrous Lactose, Hypromellose Phthalate, Croscarmellose Sodium, Stearic Acid, Magnesium Stearate, Triacetin, FD&C Red #40 Aluminum Lake, Silicon Dioxide, Colloidal, Titanium Dioxide, Hypromellose, Mineral Oil.
How many labels does Ferrous Sulfate 325 mg have?
2 labels are on file under this name since November 19, 2021: other sizes, label designs and reformulations. The current one leads this page.
- Label 263374 (current) Entered November 19, 2021 · on the market · 100 tablets · UPC 3 10135 16101 0
- Label 263347 Entered November 19, 2021 · on the market · 100 tablets · UPC 3 10135 69001 5
Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).
Who makes it?
The label names Marlex Pharmaceuticals, Inc. (distributor), New Castle, DE. All Marlex Pharmaceuticals products.