Brand
Dr. Knowles supplements
Dr. Knowles has 1 product in the NIH Dietary Supplement Label Database (1 label), 1 of them on the market at its January 2026 release; its labels most often list butterbur, feverfew, magnesium. It ranks 4,153 of 5,741 brands by products on file.
- Products on file
- 11 labels, sizes and designs counted
- On the market
- 1100% of its products
- Labels disclosing no amount
- 0products whose label gives no amount per ingredient
- On file since
- 2020newest label November 21, 2020
What do Dr. Knowles labels contain?
The ingredients its products list most, with its median amount per serving against the median of every product listing the same ingredient.
| Ingredient | Its products | Its median | Market median |
|---|---|---|---|
| Butterbur | 1 | 150 mg | 75 mg |
| Feverfew | 1 | 100 mg | 200 mg |
| Magnesium | 1 | 360 mg | 86 mg |
| Riboflavin | 1 | 400 mg | 4 mg |
Source: Supplement Facts rows of Dr. Knowles's current labels and of every product's, NIH ODS Dietary Supplement Label Database version 9.4.0.
Every Dr. Knowles product
On-market products first, A to Z (page 1 of 1).
- Migraine Prevention Formulaon the market2020
Source: NIH Dietary Supplement Label Database label entry dates and market events, version 9.4.0.
Who is behind it?
Its labels most often name Knowles Enterprises, Inc. (distributor), Miramar, FL, on 1 product.
Where next?
- Butterbur
- Feverfew
- Magnesium
- Riboflavin
- Dr. Clark Purity Products
- Dr. Fuhrman
- Dr. Hennen's
- Dr. Linus Pauling Premium Vitamins
- All brands
How to read a brand's figures, and what labels cannot tell you about a brand: comparing supplement brands by their labels. Label data, not medical advice.