PlainVitamins

amino acid

DL-phenylalanine supplements

Half of the 155 DL-phenylalanine supplements in the NIH label database that print an amount list 300 mg or less per serving; the middle half list 135 mg to 500 mg (DSLD version 9.4.0, January 2026). The 30 products whose only supplement ingredient is DL-phenylalanine list a median of 500 mg.

Products listing it
237155 print an amount; 82 list it inside a blend without an amount
Median per serving
300 mgmiddle half 135 mg to 500 mg

How much DL-phenylalanine do supplements contain?

The median product lists 300 mg per serving. One in ten lists 50 mg or less, one in ten 750 mg or more. The amount printed most often is 300 mg (42 products).

Products by amount of DL-phenylalanine per serving

155 products, log scale; extreme 0.2% at each end left out of the drawing.

DL-phenylalanine: products by amount per serving0.0003 mg0.03 mg1 mg30 mg
DL-phenylalanine: products by amount per serving0.0003 mg0.01 mg0.3 mg3 mg30 mg300 mg
DL-phenylalanine: products by amount per serving0.0003 mg0.01 mg0.1 mg1 mg10 mg100 mg
DL-phenylalanine: products by amount per serving0.0001 mg0.001 mg0.01 mg0.1 mg1 mg3 mg10 mg100 mg
DL-phenylalanine: products by amount per serving0.0001 mg0.001 mg0.01 mg0.1 mg0.3 mg1 mg3 mg10 mg30 mg100 mg300 mg
The amounts printed most often
Amount per servingProductsFor example
300 mg42 Intra Blast Raw Unflavored (NutraBio); Intra Blast Green Apple (NutraBio); Brain Energy (Douglas Laboratories)
500 mg32 DLPA 500 mg (Vitamin World); D,L-Phenylalanine 500 mg (Martin Avenue Pharmacy); DL-Phenylalanine 500 mg (Intensive Nutrition)
100 mg17 Arthro-Syn (Douglas Laboratories); Arthritin (VAXA); Higher Mind With Phosphatidylserine (Source Naturals)
250 mg9 PMA Positive Mental Attitude (Viva Vitamins); UpLift Pro (Vera's Formulations); Dr. Wilson's Dynamite Adrenal (Allergy Research Group)
750 mg9 Weight-Less (Douglas Laboratories); DLPA DL-Phenylalanine (AB American Biologics); D,L-Phenylalanine 750 mg (Metabolic Maintenance)
50 mg8 Formula FM (Rx Vitamins); Mr Hyde Intense Energy Shot Blue Razz (PS ProSupps); Mr Hyde Intense Energy Shot Fruit Punch (ProSupps)
1,000 mg8 DLPA Caps 1000 mg (Country Life); Focus DL (NS NeuroScience); DLPA 500 mg (Best Naturals)
600 mg4 DL-Phenylalanine (Biotics Research Corporation); Vitalyze (SNAC Nutrition)
25 mg3 Source of Life Energy Shot Natural Tropical Fruit Flavor (NaturesPlus)
30 mg3 Withdrawal Support (Crystal Star); Crave Eze (Crystal Star)

Source: Supplement Facts rows of every product's current label, NIH ODS Dietary Supplement Label Database version 9.4.0; amounts in one measure (weight).

Which products list the most DL-phenylalanine?

On-market products, per serving, with a plausible amount: the rule leaves out likely entry slips, such as an amount far beyond every other label with no %DV or strength on the label to back it (each product page still shows its own amount, marked).

In which products and brands?

Products listing DL-phenylalanine by DSLD product type

DL-phenylalanine by product typeOther Combinations114Amino acid/Protein31Botanical with Nutrients6Botanical2Non-Nutrient/Non-Botanical2
DL-phenylalanine by product typeOther Combinations114Amino acid/Protein31Botanical with Nutrients6Botanical2Non-Nutrient/Non-Botanical2
DL-phenylalanine by product typeOther Combinations114Amino acid/Protein31Botanical with Nutrients6Botanical2Non-Nutrient/Non-Botanical2
DL-phenylalanine by product typeOther Combinations114Amino acid/Protein31Botanical with Nutrients6Botanical2Non-Nutrient/Non-Botanical2
DL-phenylalanine by product typeOther Combinations114Amino acid/Protein31Botanical with Nutrients6Botanical2Non-Nutrient/Non-Botanical2

Brands listing it most: NutraBio (38), Pure Encapsulations (7), Morphogen Nutrition (5), Viva Vitamins (4), Douglas Laboratories (4), Source Naturals (4), SNAC Nutrition (3), BulkSupplements.com (3), ProSupps (2), Nature's Plus (2).

Every product listing DL-phenylalanine

237 products, A to Z by name (page 3 of 5), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.

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