PlainVitamins

Century Formula

by Swanson Premium Brand · tablet or pill · 130 tablets

  • Off the market since September 2018 (NIH)
  • UPC 0 87614 01250 6
  • DSLD label 174631
  • Serving 1 tablet

Century Formula by Swanson Premium Brand lists 25 ingredients, 25 with an amount per serving of 1 tablet, such as 1,500 mcg RAE of vitamin A, 90 mg of vitamin C, 10 mcg (400 IU) of vitamin D and 20 mg of vitamin E. Its current label entered the NIH Dietary Supplement Label Database on March 23, 2018.

What is in Century Formula?

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).

Century Formula: Supplement Facts rows against the market (DSLD label 174631, January 2026 release)
IngredientAmount% DVAmong products listing it
Vitamin Aas Vitamin A AcetateVitamin A (Form: as Vitamin A Acetate)1,500 mcg RAE167%
Vitamin Cas Ascorbic Acid90 mg100%Vitamin C in Century Formula against 18,583 products90 mg per serving; the middle half of products list 60 mg to 270 mg, the median 100 mg.DV 90 mgUL 2,000 mg90 mg

57% of 18,583 products listing vitamin C give more (median 100 mg).

Vitamin Das CholecalciferolVitamin D (Form: as Cholecalciferol)10 mcg (400 IU)50%Vitamin D in Century Formula against 14,175 products10 mcg per serving; the middle half of products list 10 mcg to 25 mcg, the median 15 mcg.DV 20 mcgUL 100 mcg10 mcg

57% of 14,175 products listing vitamin D give more (median 15 mcg).

Vitamin Eas D-Alpha-Tocopheryl SuccinateVitamin E (Form: as D-Alpha Tocopheryl Succinate)20 mg133%
Vitamin Kas PhytonadioneVitamin K (Form: as Phytonadione)25 mcg21%Vitamin K in Century Formula against 4,607 products25 mcg per serving; the middle half of products list 35 mcg to 100 mcg, the median 80 mcg.DV 120 mcg25 mcg

80% of 4,607 products listing vitamin K give more (median 80 mcg).

Thiamineas Thiamine Mononitrate, Vitamin B1Thiamin (Form: as Thiamin Mononitrate) (Alt. Name: Vitamin B-1)2.3 mg192%Thiamin in Century Formula against 9,830 products2.3 mg per serving; the middle half of products list 1.5 mg to 25 mg, the median 5 mg.DV 1.2 mg2.3 mg

60% of 9,830 products listing thiamin give more (median 5 mg).

Riboflavinas Vitamin B22.6 mg200%Riboflavin in Century Formula against 9,824 products2.6 mg per serving; the middle half of products list 1.7 mg to 25 mg, the median 4 mg.DV 1.3 mg2.6 mg

57% of 9,824 products listing riboflavin give more (median 4 mg).

Niacinas NiacinamideNiacin (Form: as Niacinamide)20 mg NE125%Niacin in Century Formula against 12,413 products20 mg per serving; the middle half of products list 13.2 mg to 48 mg, the median 20 mg.DV 16 mgUL 35 mg20 mg

46% of 12,413 products listing niacin give more (median 20 mg).

Vitamin B6as Pyridoxine HydrochlorideVitamin B-6 (Form: as Pyridoxine HCl)3 mg176%Vitamin B6 in Century Formula against 15,277 products3 mg per serving; the middle half of products list 2 mg to 20 mg, the median 6 mg.DV 1.7 mgUL 100 mg3 mg

64% of 15,277 products listing vitamin B6 give more (median 6 mg).

Folate667 mcg DFE167%
Folic Acid400 mcg
Vitamin B12as CyanocobalaminVitamin B-12 (Form: as Cyanocobalamin)9 mcg375%Vitamin B12 in Century Formula against 14,425 products9 mcg per serving; the middle half of products list 6 mcg to 200 mcg, the median 36 mcg.DV 2.4 mcg9 mcg

70% of 14,425 products listing vitamin B12 give more (median 36 mcg).

Biotin25 mcg83%Biotin in Century Formula against 9,447 products25 mcg per serving; the middle half of products list 50 mcg to 300 mcg, the median 200 mcg.DV 30 mcg25 mcg

92% of 9,447 products listing biotin give more (median 200 mcg).

Pantothenic Acidas D-Calcium PantothenatePantothenic Acid (Form: as D-Calcium Pantothenate)10 mg200%Pantothenic Acid (Vitamin B5) in Century Formula against 10,060 products10 mg per serving; the middle half of products list 6 mg to 50 mg, the median 12 mg.DV 5 mg10 mg

52% of 10,060 products listing pantothenic acid (vitamin B5) give more (median 12 mg).

Calciumas Calcium CarbonateCalcium (Form: from Calcium Carbonate)162 mg12%Calcium in Century Formula against 17,831 products162 mg per serving; the middle half of products list 50 mg to 252 mg, the median 115 mg.DV 1,300 mgUL 2,500 mg162 mg

Higher than 61% of 17,831 products listing calcium (median 115 mg).

Ironas Ferrous FumarateIron (Form: from Ferrous Fumarate)27 mg150%Iron in Century Formula against 6,910 products27 mg per serving; the middle half of products list 1.2 mg to 18 mg, the median 5 mg.DV 18 mgUL 45 mg27 mg

Higher than 88% of 6,910 products listing iron (median 5 mg).

Iodineas Potassium IodideIodine (Form: from Potassium Iodide)150 mcg100%Iodine in Century Formula against 6,382 products150 mcg per serving; the middle half of products list 75 mcg to 150 mcg, the median 150 mcg.DV 150 mcgUL 1,100 mcg150 mcg

15% of 6,382 products listing iodine give more (median 150 mcg).

Magnesiumas Magnesium OxideMagnesium (Form: from Magnesium Oxide)100 mg24%Magnesium in Century Formula against 14,003 products100 mg per serving; the middle half of products list 30 mg to 200 mg, the median 86 mg.UL 350 mgDV 420 mg100 mg

Higher than 51% of 14,003 products listing magnesium (median 86 mg).

Zincas Zinc SulfateZinc (Form: from Zinc Sulfate)15 mg136%Zinc in Century Formula 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 Sodium SelenateSelenium (Form: from Sodium Selenate)25 mcg45%Selenium in Century Formula against 7,658 products25 mcg per serving; the middle half of products list 27 mcg to 100 mcg, the median 55 mcg.DV 55 mcgUL 400 mcg25 mcg

75% of 7,658 products listing selenium give more (median 55 mcg).

Copperas Copper GluconateCopper (Form: from Copper Gluconate)2 mg222%Copper in Century Formula against 6,468 products2 mg per serving; the middle half of products list 0.5 mg to 2 mg, the median 1 mg.DV 0.9 mgUL 10 mg2 mg

Higher than 66% of 6,468 products listing copper (median 1 mg).

Manganeseas Manganese SulfateManganese (Form: from Manganese Sulfate)5 mg217%Manganese in Century Formula 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 ChlorideChromium (Form: from Chromium Chloride)25 mcg71%Chromium in Century Formula against 7,825 products25 mcg per serving; the middle half of products list 45 mcg to 200 mcg, the median 100 mcg.DV 35 mcg25 mcg

83% of 7,825 products listing chromium give more (median 100 mcg).

Molybdenumas Sodium MolybdateMolybdenum (Form: from Sodium Molybdate)25 mcg56%Molybdenum in Century Formula against 4,390 products25 mcg per serving; the middle half of products list 25 mcg to 75 mcg, the median 50 mcg.DV 45 mcgUL 2,000 mcg25 mcg

72% of 4,390 products listing molybdenum give more (median 50 mcg).

Potassiumas Potassium ChloridePotassium (Form: from Potassium Chloride)60 mg1%Potassium in Century Formula against 11,614 products60 mg per serving; the middle half of products list 50 mg to 190 mg, the median 99 mg.DV 4,700 mg60 mg

69% of 11,614 products listing potassium give more (median 99 mg).

Source: NIH ODS Dietary Supplement Label Database, label 174631 (entered March 23, 2018), 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:

  • 92% of the 9,447 products that print an amount of biotin list more than its 25 mcg of biotin (median 200 mcg).

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?

3 products list the very same ingredients; the nearest amounts come first.

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
Suggested Use: As a dietary supplement, take one tablet per day with water. Women who are pregnant or likely to become pregnant should not exceed recommended dose.
Warnings
Do not use if seal is broken.
Keep out of reach of children.
Women who are pregnant or likely to become pregnant should not exceed recommended dose.
Warning: Accidental overdose of iron-containing products is a leading cause of fatal poisoning in children under age six. Keep this product out of the reach of children. In case of accidental overdose, call a doctor or poison control center immediately.
Consult your healthcare provider if you are using blood-thinning medications or are pregnant or nursing.
Storage
Store in a cool, dry place.

Source: label statements in DSLD label 174631.

What else is on the label?

Other ingredients: Stearic Acid, Croscarmellose Sodium, Magnesium Stearate, Aqueous film coating, Gum Acacia, Maltodextrin.

Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): Guaranteed purity & potency.

How many labels does Century Formula have?

One label is on file, entered on March 23, 2018.

  1. Label 174631 (current) Entered March 23, 2018 · off the market September 19, 2018 · 130 tablets · UPC 0 87614 01250 6

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

Who makes it?

The label names Swanson Health Products (distributor), Fargo, ND. All Swanson Premium Brand products.

Where next?