PlainVitamins

Tandem Plus

by US Pharmaceutical Corporation · capsule · 90 capsules

  • On the market (NIH)
  • UPC 52747902600411
  • DSLD label 26608
  • Serving 1 capsule

Tandem Plus by US Pharmaceutical Corporation lists 14 ingredients, 14 with an amount per serving of 1 capsule, such as 187 mg of vitamin C, 10.3 mg of thiamine, 6 mg of riboflavin and 30 mg of niacin. Its current label entered the NIH Dietary Supplement Label Database on October 25, 2013.

What is in Tandem Plus?

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).

Tandem Plus: Supplement Facts rows against the market (DSLD label 26608, January 2026 release)
IngredientAmount% DVAmong products listing it
Vitamin C187 mg312%Vitamin C in Tandem Plus against 18,583 products187 mg per serving; the middle half of products list 60 mg to 270 mg, the median 100 mg.DV 90 mgUL 2,000 mg187 mg

Higher than 63% of 18,583 products listing vitamin C (median 100 mg).

Thiamine10.3 mg687%Thiamin in Tandem Plus against 9,830 products10.3 mg per serving; the middle half of products list 1.5 mg to 25 mg, the median 5 mg.DV 1.2 mg10.3 mg

Higher than 64% of 9,830 products listing thiamin (median 5 mg).

Riboflavin6 mg353%Riboflavin in Tandem Plus against 9,824 products6 mg per serving; the middle half of products list 1.7 mg to 25 mg, the median 4 mg.DV 1.3 mg6 mg

Higher than 57% of 9,824 products listing riboflavin (median 4 mg).

Niacin30 mg150%Niacin in Tandem Plus against 12,413 products30 mg per serving; the middle half of products list 13.2 mg to 48 mg, the median 20 mg.DV 16 mgUL 35 mg30 mg

Higher than 63% of 12,413 products listing niacin (median 20 mg).

Vitamin B65 mg250%Vitamin B6 in Tandem Plus against 15,277 products5 mg per serving; the middle half of products list 2 mg to 20 mg, the median 6 mg.DV 1.7 mgUL 100 mg5 mg

51% of 15,277 products listing vitamin B6 give more (median 6 mg).

Folic Acid1,000 mcg250%Folate in Tandem Plus against 7,022 products1,000 mcg per serving; the middle half of products list 200 mcg to 400 mcg, the median 400 mcg.1,000 mcg

Higher than 93% of 7,022 products listing folate (median 400 mcg).

Vitamin B1220 mcg333%Vitamin B12 in Tandem Plus against 14,425 products20 mcg per serving; the middle half of products list 6 mcg to 200 mcg, the median 36 mcg.DV 2.4 mcg20 mcg

59% of 14,425 products listing vitamin B12 give more (median 36 mcg).

Pantothenic Acid10 mg100%Pantothenic Acid (Vitamin B5) in Tandem Plus 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).

Iron106 mg589%Iron in Tandem Plus against 6,910 products106 mg per serving; the middle half of products list 1.2 mg to 18 mg, the median 5 mg.DV 18 mgUL 45 mg106 mg

Higher than over 99% of 6,910 products listing iron (median 5 mg). 2.4 times the adult UL a day.

53 mg from Ferrous Fumarate53 mg
53 mg from Polysaccharide Iron Complex53 mg
Zinc18.2 mg121%Zinc in Tandem Plus against 13,186 products18.2 mg per serving; the middle half of products list 5 mg to 15 mg, the median 11 mg.DV 11 mgUL 40 mg18.2 mg

Higher than 79% of 13,186 products listing zinc (median 11 mg).

Copper800 mcg40%Copper in Tandem Plus against 6,468 products0.8 mg per serving; the middle half of products list 0.5 mg to 2 mg, the median 1 mg.DV 0.9 mgUL 10 mg0.8 mg

63% of 6,468 products listing copper give more (median 1 mg).

Manganese1.3 mg57%*Manganese in Tandem Plus against 7,016 products1.3 mg per serving; the middle half of products list 1 mg to 3.92 mg, the median 2 mg.DV 2.3 mgUL 11 mg1.3 mg

67% of 7,016 products listing manganese give more (median 2 mg).

* % 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 26608 (entered October 25, 2013), 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:

  • Its 1,000 mcg of folic acid (filed by NIH under folate) is higher than 93% of the 7,022 folate products that print an amount; 183 list more.
  • At 1 serving a day, the most its directions give, the label lists 106 mg of iron, 2.4 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.

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 AND ADMINISTRATION: Adults (persons over 12 years of age), one (1) capsule daily, between meals, or as prescribed by a physician. Do not exceed recommended dosage.
Warnings
Do not administer to children under the age of 12.
CAUTION: Rx only.
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.
You should contact your healthcare provider for medical advice about adverse events.
Storage
Store at controlled room temperature 15(0) to 30(0)C (59(0) to 86(0)F). Keep in a cool, dry place.

Source: label statements in DSLD label 26608.

What else is on the label?

Other ingredients: Sodium Ascorbate, Gelatin, Zinc Sulfate, Niacinamide, Calcium D-Pantothenate, Thiamine Mononitrate, Silicon Dioxide, Pyridoxine Hydrochloride, Magnesium Stearate, Manganese Sulfate, Titanium Dioxide, Copper Sulfate, Dibasic Calcium Phosphate, FDA/E172 Red Iron Oxide, Cyanocobalamin.

How many labels does Tandem Plus have?

One label is on file, entered on October 25, 2013.

  1. Label 26608 (current) Entered October 25, 2013 · on the market · 90 capsules · UPC 52747902600411

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

Who makes it?

The label names US Pharmaceutical Corporation (distributor), Decatur, GA. All US Pharmaceutical Corporation products.

Where next?