PlainVitamins

Principal Forte

by Donovan Werke · tablet or pill · 75 Tabletas Recubiertas

  • On the market (NIH)
  • DSLD label 239520
  • Serving 2 tabletas

Principal Forte by Donovan Werke lists 7 ingredients, 7 with an amount per serving of 2 tabletas, such as 300 mg of essential phospholipids, 6 mg of vitamin B1, 6 mg of vitamin B2 and 6 mg of vitamin B6. Its current label entered the NIH Dietary Supplement Label Database on November 21, 2020.

What is in Principal Forte?

Each row as the label prints it, per serving of 2 tabletas. 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).

Principal Forte: Supplement Facts rows against the market (DSLD label 239520, January 2026 release)
IngredientAmount% DVAmong products listing it
Essential PhospholipidsEssential Phospholipids Note: main300 mgPhospholipid in Principal Forte against 257 products300 mg per serving; the middle half of products list 130 mg to 400 mg, the median 245 mg.300 mg

Higher than 53% of 257 products listing phospholipid (median 245 mg).

Vitamin B1as Thiamine Hydrochloride6 mg500%*Thiamin in Principal Forte against 9,830 products6 mg per serving; the middle half of products list 1.5 mg to 25 mg, the median 5 mg.DV 1.2 mg6 mg

Higher than 55% of 9,830 products listing thiamin (median 5 mg).

Vitamin B2as Riboflavin6 mg462%*Riboflavin in Principal Forte 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).

Vitamin B6as Pyridoxine Hydrochloride6 mg353%*Vitamin B6 in Principal Forte against 15,277 products6 mg per serving; the middle half of products list 2 mg to 20 mg, the median 6 mg.DV 1.7 mgUL 100 mg6 mg

49% of 15,277 products listing vitamin B6 give more (median 6 mg).

Vitamin B12as Cyanocobalamin6 mcg250%*Vitamin B12 in Principal Forte against 14,425 products6 mcg per serving; the middle half of products list 6 mcg to 200 mcg, the median 36 mcg.DV 2.4 mcg6 mcg

74% of 14,425 products listing vitamin B12 give more (median 36 mcg).

Nicotinamide30 mg188%*Niacin in Principal Forte 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 E6 mg40%*

* % 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 239520 (entered November 21, 2020), 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?

Every amount on this label with a position sits within the middle 80% of the products that list the same ingredient.

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 Principal Forte'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
Dosis y administracion Vía de administración oral. La dosis puede ser diferente para los distintos pacientes. Siga las instrucciones que su médico le indique. A continuación se presentan las dosis promedio usuales: Adultos: 2 tabletas recubiertas tres veces al día después de cada comida, durante tres meses.
Warnings
Producto medicinal, manténgase fuera del alcance de los niños.
Administración, dosis y venta según prescripción médica.
Storage
Condiciones de almacenamiento Polvo antes de preparar la suspensión y tabletas recubiertas: protéjase de la luz y consérvese en un lugar fresco y seco a una temperatura menor a 30 grados C.

Source: label statements in DSLD label 239520.

What else is on the label?

Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): Laboratorio y Drogueria Donovan Werke Fabricamos Salud.

How many labels does Principal Forte have?

One label is on file, entered on November 21, 2020.

  1. Label 239520 (current) Entered November 21, 2020 · on the market · 75 Tabletas Recubiertas

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

Who makes it?

The label names Donovan Werke (manufacturer). All Donovan Werke products.

Where next?