Amino acid · Supplement ingredient
DL-phenylalanine
DL-phenylalanine is listed on 183 U.S. supplement product labels in the NIH DSLD, #611 of 4,614 by label frequency.
- 183
- Products
- #611 of 4,614
- By frequency
How common is DL-phenylalanine?
Number of supplement labels listing DL-phenylalanine vs nearby amino acid ingredients
- Leucine
Leucine
4,582 products
- Glutamine
Glutamine
2,515 products
- Valine
Valine
1,971 products
- Isoleucine
Isoleucine
1,946 products
- Tyrosine 1,744
Tyrosine
1,744 products
- DL-phenylalanine 183
DL-phenylalanine
183 products
Products containing DL-phenylalanine
Nearby Ingredients in Amino acid
Other ingredients in the Amino acid category cataloged in the NIH DSLD. Useful for comparing how common different nutrients are across the US supplement market.
Nationwide ingredients with similar DSLD presence
Two peer sets for DL-phenylalanine: closest on total DSLD label listings (183 here) and closest on distinct brands that list it (71 here). Peers exclude the same DSLD category, and rows stay link-disjoint so each axis is a distinct neighborhood.
Similar label frequency
Nearest other ingredients by distinct DSLD product labels (floored at ≥50), outside this category.
Frequently asked about DL-phenylalanine
How many supplement products contain DL-phenylalanine? ▼
Source: NIH Office of Dietary Supplements, Dietary Supplement Label Database (DSLD). Regulatory reference: Source: Dietary Supplement Health and Education Act (DSHEA), 1994, 21 U.S.C. § 321(ff).
Disclaimer, Not Medical Advice: Information on this page is based on manufacturer-declared label data and is provided for educational and reference purposes only. It does not constitute medical, nutritional, or health advice. Consult a licensed healthcare provider before starting, stopping, or combining any supplement, especially if you are pregnant, nursing, take prescription medication, or have a medical condition.
Read our methodology , how this data is sourced, computed, and verified.
Every figure on PlainVitamins is rendered directly from the NIH Dietary Supplement Label Database (DSLD), no number is typed in by an editor. Ingredient figures are computed directly from the NIH DSLD, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.