PlainVitamins

The Big One with Iron

by Metabolic Maintenance · capsule · 90 capsules

  • On the market (NIH)
  • UPC 8 38287 00518 6
  • DSLD label 321280
  • Serving 1 capsule
  • 90 servings

The Big One with Iron by Metabolic Maintenance lists 26 ingredients, 26 with an amount per serving of 1 capsule, such as 2,400 mcg RAE of vitamin A, 125 mg of vitamin C, 25 mcg (1,000 IU) of vitamin D3 and 67 mg of vitamin E. Its current label entered the NIH Dietary Supplement Label Database on November 22, 2024.

What is in The Big One with Iron?

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).

The Big One with Iron: Supplement Facts rows against the market (DSLD label 321280, January 2026 release)
IngredientAmount% DVAmong products listing it
Vitamin Aas Natural Mixed Carotenoids, Vitamin A Palmitate2,400 mcg RAE267%
Vitamin Cas Ascorbic Acid, Ascorbyl Palmitate125 mg139%Vitamin C in The Big One with Iron against 18,583 products125 mg per serving; the middle half of products list 60 mg to 270 mg, the median 100 mg.DV 90 mgUL 2,000 mg125 mg

Higher than 56% of 18,583 products listing vitamin C (median 100 mg).

Vitamin D3as Cholecalciferol25 mcg (1,000 IU)125%Vitamin D in The Big One with Iron against 14,175 products25 mcg per serving; the middle half of products list 10 mcg to 25 mcg, the median 15 mcg.DV 20 mcgUL 100 mcg25 mcg

Higher than 59% of 14,175 products listing vitamin D (median 15 mcg).

Vitamin Eas D-Alpha-Tocopheryl Succinate, Mixed Tocopherols67 mg447%
Vitamin K185 mcg71%Vitamin K in The Big One with Iron against 4,607 products100 mcg per serving; the middle half of products list 35 mcg to 100 mcg, the median 80 mcg.DV 120 mcg100 mcg

Higher than 69% of 4,607 products listing vitamin K (median 80 mcg).

Thiamineas Thiamine Mononitrate25 mg2,083%Thiamin in The Big One with Iron against 9,830 products25 mg per serving; the middle half of products list 1.5 mg to 25 mg, the median 5 mg.DV 1.2 mg25 mg

Higher than 72% of 9,830 products listing thiamin (median 5 mg).

Riboflavinas Riboflavin 5-Phosphate25 mg1,923%Riboflavin in The Big One with Iron against 9,824 products25 mg per serving; the middle half of products list 1.7 mg to 25 mg, the median 4 mg.DV 1.3 mg25 mg

Higher than 75% of 9,824 products listing riboflavin (median 4 mg).

Niacinas Niacinamide100 mg NE625%Niacin in The Big One with Iron against 12,413 products100 mg per serving; the middle half of products list 13.2 mg to 48 mg, the median 20 mg.DV 16 mgUL 35 mg100 mg

Higher than 88% of 12,413 products listing niacin (median 20 mg). 2.9 times the adult UL a day.

Vitamin B6as Pyridoxal 5-Phosphate, Pyridoxine Hydrochloride25 mg1,471%Vitamin B6 in The Big One with Iron against 15,277 products25 mg per serving; the middle half of products list 2 mg to 20 mg, the median 6 mg.DV 1.7 mgUL 100 mg25 mg

Higher than 76% of 15,277 products listing vitamin B6 (median 6 mg).

Folate667 mcg DFE167%
Calcium L-5-Methylfolatecalcium salt400 mcg
Vitamin B12as Methylcobalamin100 mcg4,167%Vitamin B12 in The Big One with Iron against 14,425 products100 mcg per serving; the middle half of products list 6 mcg to 200 mcg, the median 36 mcg.DV 2.4 mcg100 mcg

Higher than 61% of 14,425 products listing vitamin B12 (median 36 mcg).

Biotin200 mcg667%Biotin in The Big One with Iron against 9,447 products200 mcg per serving; the middle half of products list 50 mcg to 300 mcg, the median 200 mcg.DV 30 mcg200 mcg

48% of 9,447 products listing biotin give more (median 200 mcg).

Pantothenic Acidas Calcium D-Pantothenate100 mg2,000%Pantothenic Acid (Vitamin B5) in The Big One with Iron against 10,060 products100 mg per serving; the middle half of products list 6 mg to 50 mg, the median 12 mg.DV 5 mg100 mg

Higher than 86% of 10,060 products listing pantothenic acid (vitamin B5) (median 12 mg).

Ironas Iron Bisglycinate10 mg56%Iron in The Big One with Iron against 6,910 products10 mg per serving; the middle half of products list 1.2 mg to 18 mg, the median 5 mg.DV 18 mgUL 45 mg10 mg

Higher than 67% of 6,910 products listing iron (median 5 mg).

Iodineas Potassium Iodide100 mcg67%Iodine in The Big One with Iron against 6,382 products100 mcg per serving; the middle half of products list 75 mcg to 150 mcg, the median 150 mcg.DV 150 mcgUL 1,100 mcg100 mcg

59% of 6,382 products listing iodine give more (median 150 mcg).

Zincas Zinc Citrate15 mg136%Zinc in The Big One with Iron against 13,186 products15 mg per serving; the middle half of products list 5 mg to 15 mg, the median 11 mg.DV 11 mgUL 40 mg15 mg

Higher than 56% of 13,186 products listing zinc (median 11 mg).

Seleniumas L-Selenomethionine100 mcg182%Selenium in The Big One with Iron against 7,658 products100 mcg per serving; the middle half of products list 27 mcg to 100 mcg, the median 55 mcg.DV 55 mcgUL 400 mcg100 mcg

Higher than 65% of 7,658 products listing selenium (median 55 mcg).

Copperas Copper Gluconate1 mg111%Copper in The Big One with Iron against 6,468 products1 mg per serving; the middle half of products list 0.5 mg to 2 mg, the median 1 mg.DV 0.9 mgUL 10 mg1 mg

40% of 6,468 products listing copper give more (median 1 mg).

Manganeseas Manganese Glycinate5 mg217%Manganese in The Big One with Iron against 7,016 products5 mg per serving; the middle half of products list 1 mg to 3.92 mg, the median 2 mg.DV 2.3 mgUL 11 mg5 mg

Higher than 80% of 7,016 products listing manganese (median 2 mg).

Chromiumas Chromium Polynicotinate100 mcg286%Chromium in The Big One with Iron against 7,825 products100 mcg per serving; the middle half of products list 45 mcg to 200 mcg, the median 100 mcg.DV 35 mcg100 mcg

47% of 7,825 products listing chromium give more (median 100 mcg).

Molybdenumas Molybdenum Glycinate50 mcg111%Molybdenum in The Big One with Iron against 4,390 products50 mcg per serving; the middle half of products list 25 mcg to 75 mcg, the median 50 mcg.DV 45 mcgUL 2,000 mcg50 mcg

41% of 4,390 products listing molybdenum give more (median 50 mcg).

Betaine Hydrochloride25 mgBetaine Hydrochloride in The Big One with Iron against 914 products25 mg per serving; the middle half of products list 25 mg to 178 mg, the median 50 mg.25 mg

58% of 914 products listing betaine hydrochloride give more (median 50 mg).

Boronas Boron Citrate1 mgBoron in The Big One with Iron against 3,339 products1 mg per serving; the middle half of products list 0.3 mg to 2 mg, the median 1 mg.UL 20 mg1 mg

42% of 3,339 products listing boron give more (median 1 mg).

Vanadiumas Vanadyl Sulfate50 mcgVanadium in The Big One with Iron against 1,744 products50 mcg per serving; the middle half of products list 10 mcg to 100 mcg, the median 25 mcg.UL 1,800 mcg50 mcg

Higher than 59% of 1,744 products listing vanadium (median 25 mcg).

Vitamin K2as Vitamin K215 mcg

Source: NIH ODS Dietary Supplement Label Database, label 321280 (entered November 22, 2024), 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 100 mg of niacin, 2.9 times the adult Tolerable Upper Intake Level.

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 The Big One with Iron's, rare ingredients counting for more.

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: One (1) capsule daily with a meal, or as directed by a healthcare professional.
Warnings
Keep tightly closed in a cool, dry place, out of the reach of children.
Warning: Accidental overdose of iron-containing products is a leading cause of fatal poisoning in children under 6. Keep this product out of the reach of children. In case of an accidental overdose, call a doctor or poison control center immediately.
Vitamin E is derived from soy oil.
Allergens and what it does not contain
Egg free Gluten free Free of nuts Dairy free
Storage
Moisture sensitive formula. Best consumed within 120 days after opening.

Source: label statements in DSLD label 321280.

What else is on the label?

Other ingredients: Vegetarian Cellulose Capsule, Vitamin E.

How many labels does The Big One with Iron have?

3 labels are on file under this name since November 25, 2013: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 321280 (current) Entered November 22, 2024 · on the market · 90 capsules · UPC 8 38287 00518 6
  2. Label 274128 Entered September 22, 2022 · off the market December 18, 2023 · 90 capsules · UPC 8 38287 00518 6
  3. Label 25144 Entered November 25, 2013 · on the market · 100 capsules · UPC 8 38287 00518 6

Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).

Who makes it?

The label names Metabolic Maintenance (manufacturer), Sisters, Oregon. All Metabolic Maintenance products.

Where next?