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Amino Acid & Protein Supplements

Browse and search dietary supplements drawn from the U.S. National Institutes of Health Dietary Supplement Label Database (DSLD), which catalogs more than 113,000 product labels from supplement manufacturers. The U.S. supplement market is large, industry estimates put consumer spending around $50 billion a year, and each product page below renders directly from the latest DSLD release. See our methodology for source vintage and how each ingredient panel is parsed.

9,363 products · Page 99 of 188

L-Phenylalanine 500 mg
NOW
4 ingredients · Amino acid/Protein
Off Market
L-Phenylalanine 500 mg
NOW
4 ingredients · Amino acid/Protein
Off Market
L-Phenylalanine 500 mg
Douglas Laboratories
4 ingredients · Amino acid/Protein
Off Market
L-Phenylalanine 500 mg
BIOVEA
7 ingredients · Amino acid/Protein
Off Market
L-Phenylalanine 500 mg
Thompson
2 ingredients · Amino acid/Protein
On Market
L-Phenylalanine 500 mg
NOW
2 ingredients · Amino acid/Protein
Off Market
L-Phenylalanine 500 mg
NOW
2 ingredients · Amino acid/Protein
Off Market
L-Phenylalanine 500 mg
Solgar
3 ingredients · Amino acid/Protein
Off Market
L-Phenylalanine 500 mg
NOW
2 ingredients · Amino acid/Protein
Off Market
L-Phenylalanine 500 mg
NOW
2 ingredients · Amino acid/Protein
Off Market
L-Phenylalanine 500 mg
NOW
2 ingredients · Amino acid/Protein
Off Market
L-Phenylalanine 500 mg
NOW
2 ingredients · Amino acid/Protein
On Market
L-Phenylalanine 500 mg
BIOVEA
5 ingredients · Amino acid/Protein
Off Market
L-Phenylalanine 500 mg
NOW
2 ingredients · Amino acid/Protein
On Market
L-Phenylalanine 500 mg
BIOVEA
5 ingredients · Amino acid/Protein
Off Market
L-Phenylalanine 500 mg
Bluebonnet
4 ingredients · Amino acid/Protein
On Market
L-Phenylalanine 500 mg
Bluebonnet
4 ingredients · Amino acid/Protein
On Market
L-Phenylalanine 500 mg
BIOVEA
5 ingredients · Amino acid/Protein
On Market
L-Phenylalanine 500 mg
Solgar
5 ingredients · Amino acid/Protein
Off Market
L-Phenylalanine 500 mg
Solgar
4 ingredients · Amino acid/Protein
Off Market
L-Phenylalanine 500 mg
Solgar
3 ingredients · Amino acid/Protein
Off Market
L-Phenylalanine 500 mg
Solgar
3 ingredients · Amino acid/Protein
On Market
L-Phenylalanine 500 mg
Solgar
4 ingredients · Amino acid/Protein
Off Market
L-Phenylalanine 500 mg
Solgar
3 ingredients · Amino acid/Protein
Off Market
L-Phenylalanine 500 mg
Solgar
3 ingredients · Amino acid/Protein
On Market
L-Phenylalanine 500 mg
Nutricost
4 ingredients · Amino acid/Protein
Off Market
L-Phenylalanine 500 mg
Douglas Laboratories
5 ingredients · Amino acid/Protein
On Market
L-Phenylalanine 500 mg
AN Amazing Nutrition Amazing Formulas
3 ingredients · Amino acid/Protein
On Market
L-Phenylalanine 500 mg
Nutricost
4 ingredients · Amino acid/Protein
On Market
L-Phenylalanine 500 mg
Best Naturals
8 ingredients · Amino acid/Protein
On Market
L-Phenylalanine 500 mg
Source Naturals
7 ingredients · Amino acid/Protein
On Market
L-Phenylalanine 500 mg
Metabolic Maintenance
4 ingredients · Amino acid/Protein
On Market
L-Phenylalanine 500 mg
Best Naturals
8 ingredients · Amino acid/Protein
On Market
L-Phenylalanine 500 mg
Nutricost
4 ingredients · Amino acid/Protein
On Market
L-Phenylalanine 500 mg
NOW
2 ingredients · Amino acid/Protein
On Market
L-Phenylalanine 500 mg
Bluebonnet
5 ingredients · Amino acid/Protein
On Market
L-Phenylalanine 500 mg Capsules
BulkSupplements.com
2 ingredients · Amino acid/Protein
On Market
L-Phenylalanine 500 Milligrams
NutraBio
2 ingredients · Amino acid/Protein
On Market
L-Phenylalanine Powder
Nootropics Depot
1 ingredient · Amino acid/Protein
On Market
L-Phenylalanine Powder
Herbadiet
1 ingredient · Amino acid/Protein
On Market
L-Proline 2,000 mg
Nutricost
2 ingredients · Amino acid/Protein
On Market
L-Proline 2000 mg Capsules
BulkSupplements.com
2 ingredients · Amino acid/Protein
On Market
L-Proline 3000 mg
SuperSmart
3 ingredients · Amino acid/Protein
On Market
L-Proline 3000 mg
SuperSmart
2 ingredients · Amino acid/Protein
On Market
L-Proline 500 mg
Douglas Laboratories
4 ingredients · Amino acid/Protein
Off Market
L-Proline 500 mg
Douglas Laboratories
4 ingredients · Amino acid/Protein
Off Market
L-Proline 500 mg
Physician's Preference
4 ingredients · Amino acid/Protein
Off Market
L-Proline 500 mg
NOW
4 ingredients · Amino acid/Protein
Off Market
L-Proline 500 mg
Douglas Laboratories
4 ingredients · Amino acid/Protein
Off Market
L-Proline 500 mg
Solgar
3 ingredients · Amino acid/Protein
Off Market