PlainVitamins

amino acid

Phenylalanine supplements

Half of the 611 phenylalanine supplements in the NIH label database that print an amount list 250 mg or less per serving; the middle half list 100 mg to 597.5 mg (DSLD version 9.4.0, January 2026). The 24 products whose only supplement ingredient is phenylalanine list a median of 500 mg.

Products listing it
1,203611 print an amount; 591 list it inside a blend without an amount
Median per serving
250 mgmiddle half 100 mg to 597.5 mg

How much phenylalanine do supplements contain?

The median product lists 250 mg per serving. One in ten lists 32 mg or less, one in ten 932 mg or more. The amount printed most often is 500 mg (43 products).

Products by amount of phenylalanine per serving

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

Phenylalanine: products by amount per serving0.001 mg0.1 mg3 mg30 mg1,000 mg
Phenylalanine: products by amount per serving0.001 mg0.03 mg1 mg10 mg100 mg
Phenylalanine: products by amount per serving0.001 mg0.01 mg0.1 mg1 mg10 mg100 mg1,000 mg
Phenylalanine: products by amount per serving0.001 mg0.01 mg0.1 mg1 mg3 mg10 mg100 mg1,000 mg
Phenylalanine: products by amount per serving0.001 mg0.01 mg0.1 mg0.3 mg1 mg3 mg10 mg30 mg100 mg300 mg1,000 mg
The amounts printed most often
Amount per servingProductsFor example
500 mg43 L-Phenylalanine 500 mg (Vitamin World); Recon (MusclePharm); Accell Therapeutic (Systemic Formulas)
100 mg41 Dextox In Guard Tabsules (Perque); Detox In Guard Tabsule (Perque); Raspberry Ketones Mega+ 250 mg (Natural Sport)
250 mg33 Bronson Memory Formula (Bronson Laboratories); Hybrid Creatine Complex Fruit Punch (GNC Pro Performance); Hybrid Creatine Complex Unflavored (GNC Pro Performance)
200 mg24 Trac Grape (MHP); Trac Orange (MHP); Amino Acid Neurotransmitter Formula (Allergy Research Group)
50 mg21 Mr Hyde Intense Energy Shot Blue Razz (PS ProSupps); Mr Hyde Intense Energy Shot Fruit Punch (ProSupps); Activator (Nutri-Spec)
300 mg19 Amino Acid Synergy (Designs for Health); Ultimate EAA Grape (BodyTech Elite); Ultimate EAA Fruit Punch (BodyTech Elite)
465 mg13 Replenish Orange Twist (Arms Race Nutrition); BCAA/EAA Unflavored (Arms Race Nutrition Basics); Replenish Apple Pie Moonshine (Arms Race Nutrition)
150 mg12 BCAA Resurgence Pina Colada (Blackstone Labs); Dozer Honey Lemon Tea (Axe & Sledge Supplements); Viti-Nutrients (Merry Clinic)
1,000 mg11 L-Phenylalanine 500 mg (BIOVEA); Raw Organic 100% Plant-Based Protein Very Berry (Natural Factors); DLPA 1,000 mg (AN Amazing Nutrition Amazing Formulas)
600 mg9 AminoX EAAs Jungle Juice (BSN); AminoX EAAs Purple People Eater (BSN); AminoX EAAs Strawberry Dragonfruit (BSN)

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 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).

Have the amounts changed over the years?

Products whose current label entered DSLD in 2011 list a median of 422 mg; those entered in 2025, 200 mg.

Median phenylalanine per serving by the year the label entered DSLD (years with 20+ products)
YearProductsMedian per serving
201121422 mg
201245350 mg
201350250 mg
201429647 mg
201527100 mg
201625250 mg
201727104 mg
201820813 mg
201925135 mg
202062250 mg
202147250 mg
202258250 mg
202348200 mg
202462240 mg
202565200 mg

Source: DSLD label entry dates and amounts, current labels.

In which products and brands?

Products listing phenylalanine by DSLD product type

Phenylalanine by product typeOther Combinations431Amino acid/Protein168Botanical with Nutrients11Multi-Vitamin and Mineral (MVM)1
Phenylalanine by product typeOther Combinations431Amino acid/Protein168Botanical with Nutrients11Multi-Vitamin and Mineral (MVM)1
Phenylalanine by product typeOther Combinations431Amino acid/Protein168Botanical with Nutrients11Multi-Vitamin and Mineral (MVM)1
Phenylalanine by product typeOther Combinations431Amino acid/Protein168Botanical with Nutrients11Multi-Vitamin and Mineral (MVM)1
Phenylalanine by product typeOther Combinations431Amino acid/Protein168Botanical with Nutrients11Multi-Vitamin and Mineral (MVM)1

Brands listing it most: Douglas Laboratories (21), Axe & Sledge Supplements (15), Source Naturals (13), Arms Race Nutrition (12), Muscle Feast (11), Bronson (10), Metabolic Nutrition (10), ALLMAX (9), California Academy of Health (8), Natural Factors VegiDay (8).

Every product listing phenylalanine

1,203 products, A to Z by name (page 22 of 25), 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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