PlainVitamins

Loplex

by Douglas Laboratories · tablet or pill · 100 tablets

  • On the market (NIH)
  • DSLD label 9101
  • Serving 4 tablets
  • 25 servings

Loplex by Douglas Laboratories lists 6 ingredients, 6 with an amount per serving of 4 tablets, such as 300 mg of vitamin C, 400 IU (10 mcg) of vitamin D, 100 mg of thiamine and 20 mg of riboflavin. Its current label entered the NIH Dietary Supplement Label Database on June 1, 2012.

What is in Loplex?

Each row as the label prints it, per serving of 4 tablets. 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).

Loplex: Supplement Facts rows against the market (DSLD label 9101, January 2026 release)
IngredientAmount% DVAmong products listing it
Vitamin Aas Fish Liver OilsVitamin A (Form: from fish liver oils)4,000 IU80%
Vitamin C300 mg500%Vitamin C in Loplex against 18,583 products300 mg per serving; the middle half of products list 60 mg to 270 mg, the median 100 mg.DV 90 mgUL 2,000 mg300 mg

Higher than 75% of 18,583 products listing vitamin C (median 100 mg).

Vitamin Das Fish Liver OilVitamin D (Form: from fish liver oils)400 IU (10 mcg)100%Vitamin D in Loplex 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 mixed tocopherols24 IU80%
Thiamine100 mg667%

This amount is far outside what other labels list for thiamin, or disagrees with the label's own %DV: possibly a unit or transcription slip in the database. Check the label image on DSLD.

Riboflavin20 mg1,176%Riboflavin in Loplex against 9,824 products20 mg per serving; the middle half of products list 1.7 mg to 25 mg, the median 4 mg.DV 1.3 mg20 mg

Higher than 72% of 9,824 products listing riboflavin (median 4 mg).

Niacinamide100 mg500%Niacin in Loplex 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.

Iodineas KelpIodine (Form: from Kelp)150 mcg100%Iodine in Loplex 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).

Source: NIH ODS Dietary Supplement Label Database, label 9101 (entered June 1, 2012), 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:

  • 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.

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 Usage: As a dietary supplement, adults take 4 tablets daily or as directed by physician. This product is best taken before meals.
Warnings
KEEP OUT OF REACH OF CHILDREN.
Tamper resistant package, do not use if outer seal is missing.
Allergens and what it does not contain
This product contains NO yeast, wheat gluten, soy protein, milk/dairy, corn, sodium, sugar, starch, artificial coloring, preservatives or flavoring.
Storage
For optimal storage conditions, store in a cool, dry place. (59(0)-77(0)F/15(0)-25(0)C) (35-65% relative humidity)

Source: label statements in DSLD label 9101.

What else is on the label?

Other ingredients: Cellulose, Vegetable Stearate, Silica.

How many labels does Loplex have?

One label is on file, entered on June 1, 2012.

  1. Label 9101 (current) Entered June 1, 2012 · on the market · 100 tablets

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

Who makes it?

The label names Douglas Laboratories (manufacturer), Pittsburgh, PA. All Douglas Laboratories products.

Where next?