PlainVitamins

P.r.f.

by Priority One Nutritional Supplements · capsule · 90 vegetarian capsules

  • On the market (NIH)
  • UPC 8 15354 02111 9
  • DSLD label 310770
  • Serving 1 vegetarian capsule
  • 90 servings

P.r.f. by Priority One Nutritional Supplements lists 16 ingredients, 16 with an amount per serving of 1 vegetarian capsule, such as 10 mg of thiamine hydrochloride, 1 mg of riboflavin, 50 mg NE of niacin and 10 mg of vitamin B6. Its current label entered the NIH Dietary Supplement Label Database on October 24, 2024.

What is in P.r.f.?

Each row as the label prints it, per serving of 1 vegetarian 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).

P.r.f.: Supplement Facts rows against the market (DSLD label 310770, January 2026 release)
IngredientAmount% DVAmong products listing it
Thiamine Hydrochlorideas Vitamin B110 mg821%Thiamin in P.R.F. against 9,830 products10 mg per serving; the middle half of products list 1.5 mg to 25 mg, the median 5 mg.DV 1.2 mg10 mg

Higher than 59% of 9,830 products listing thiamin (median 5 mg).

Riboflavinas Vitamin B21 mg77%Riboflavin in P.R.F. against 9,824 products1 mg per serving; the middle half of products list 1.7 mg to 25 mg, the median 4 mg.DV 1.3 mg1 mg

84% of 9,824 products listing riboflavin give more (median 4 mg).

Niacinas Niacinamide50 mg NE313%Niacin in P.R.F. against 12,413 products50 mg per serving; the middle half of products list 13.2 mg to 48 mg, the median 20 mg.DV 16 mgUL 35 mg50 mg

Higher than 75% of 12,413 products listing niacin (median 20 mg). 1.4 times the adult UL a day.

Vitamin B6as Pyridoxine Hydrochloride10 mg576%Vitamin B6 in P.R.F. against 15,277 products10 mg per serving; the middle half of products list 2 mg to 20 mg, the median 6 mg.DV 1.7 mgUL 100 mg10 mg

Higher than 55% of 15,277 products listing vitamin B6 (median 6 mg).

Calciumas Calcium Carbonate, Calcium Lactate5 mg1%Calcium in P.R.F. against 17,831 products5 mg per serving; the middle half of products list 50 mg to 252 mg, the median 115 mg.DV 1,300 mgUL 2,500 mg5 mg

98% of 17,831 products listing calcium give more (median 115 mg).

Zincas Zinc Aspartate, Zinc Oxide1 mg5%Zinc in P.R.F. against 13,186 products1 mg per serving; the middle half of products list 5 mg to 15 mg, the median 11 mg.DV 11 mgUL 40 mg1 mg

96% of 13,186 products listing zinc give more (median 11 mg).

Potassiumas Potassium Citrate2 mg1%

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

L-Aspartic Acid75 mgAspartic Acid in P.R.F. against 377 products75 mg per serving; the middle half of products list 106 mg to 1,846 mg, the median 337 mg.75 mg

82% of 377 products listing aspartic acid give more (median 337 mg).

Indian Valerian100 mgValerian in P.R.F. against 647 products100 mg per serving; the middle half of products list 80 mg to 450 mg, the median 200 mg.100 mg

64% of 647 products listing valerian give more (median 200 mg).

Blue Passionflower flower extract4:125 mgPassionflower in P.R.F. against 562 products25 mg per serving; the middle half of products list 40 mg to 200 mg, the median 100 mg.25 mg

81% of 562 products listing passionflower give more (median 100 mg).

Hops Strobile Extract4:113 mgHops in P.R.F. against 342 products13 mg per serving; the middle half of products list 50 mg to 150 mg, the median 75 mg.13 mg

95% of 342 products listing hops give more (median 75 mg).

Chinese Skullcap root extract4:125 mgBaikal Skullcap in P.R.F. against 114 products25 mg per serving; the middle half of products list 40 mg to 200 mg, the median 90 mg.25 mg

80% of 114 products listing baikal skullcap give more (median 90 mg).

White Willow Bark Extractas Salix albia L. Bark Extract4:150 mgWhite Willow in P.R.F. against 256 products50 mg per serving; the middle half of products list 80 mg to 400 mg, the median 150 mg.50 mg

79% of 256 products listing white willow give more (median 150 mg).

Peppermint Leaf Extractas Mentha x piperita L. Leaf Extract7 mgPeppermint in P.R.F. against 278 products7 mg per serving; the middle half of products list 20 mg to 207.5 mg, the median 50 mg.7 mg

94% of 278 products listing peppermint give more (median 50 mg).

DL-Phenylalanine150 mgDL-phenylalanine in P.R.F. against 155 products150 mg per serving; the middle half of products list 135 mg to 500 mg, the median 300 mg.150 mg

74% of 155 products listing DL-phenylalanine give more (median 300 mg).

L-Glutamic Acid25 mgGlutamic Acid in P.R.F. against 697 products25 mg per serving; the middle half of products list 25 mg to 364 mg, the median 80 mg.25 mg

67% of 697 products listing glutamic acid give more (median 80 mg).

Source: NIH ODS Dietary Supplement Label Database, label 310770 (entered October 24, 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 50 mg of niacin, 1.4 times the adult Tolerable Upper Intake Level.
  • 98% of the 17,831 products that print an amount of calcium list more than its 5 mg of calcium (median 115 mg).
  • 96% of the 13,186 products that print an amount of zinc list more than its 1 mg of zinc (median 11 mg).
  • 95% of the 342 products that print an amount of hops list more than its 13 mg of hops (median 75 mg).
  • 94% of the 278 products that print an amount of peppermint list more than its 7 mg of peppermint (median 50 mg).

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 P.r.f.'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
Recommendations: Take one (1) capsule as needed or as directed by your physician.
Warnings
Warning: May interact with other medications, consult your physician before use.
Children with fevers and patients with ulcers or gastritis should not take white willow bark.
If you are pregnant or breast feeding, consult your physician before using this product.
Do not exceed six (6) capsules in a 24 hour period.
Keep out of reach of children.
For professional use only.
Allergens and what it does not contain
Contains no preservatives. Bisphenol-A (BPA) & Phthalate Free
Non-GMO
Storage
Keep container tightly closed, store in a cool, dry place.

Source: label statements in DSLD label 310770.

What else is on the label?

Other ingredients: Silicon Dioxide, Hypromellose, Water, Purified.

Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): GMP Certified.

How many labels does P.r.f. have?

2 labels are on file under this name since October 23, 2020: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 310770 (current) Entered October 24, 2024 · on the market · 90 vegetarian capsules · UPC 8 15354 02111 9
  2. Label 236828 Entered October 23, 2020 · off the market March 30, 2023 · 90 vegetarian capsules · UPC 8 15354 02111 9

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

Who makes it?

The label names Priority One Nutritional Supplements, Inc. (distributor). All Priority One Nutritional Supplements products.

Where next?