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.
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).
- 100% Whey Protein ApfelstrudelBody Attack Sports Nutrition3,470 mg
- Grunt Cherry LimeRedcon12,630 mg
- Grunt Blood OrangeRedcon12,630 mg
- Amino Warheads Sour Green AppleGhost2,550 mg
- MRP ChocolatePure Advantage2,374 mg
- MRP VanillaPure Advantage2,374 mg
- Amino Restore Natural Choclate FlavorTaylor MD Formulations1,770 mg
- Leanology ChocolateTriVita1,750 mg
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.
| Year | Products | Median per serving |
|---|---|---|
| 2011 | 21 | 422 mg |
| 2012 | 45 | 350 mg |
| 2013 | 50 | 250 mg |
| 2014 | 29 | 647 mg |
| 2015 | 27 | 100 mg |
| 2016 | 25 | 250 mg |
| 2017 | 27 | 104 mg |
| 2018 | 20 | 813 mg |
| 2019 | 25 | 135 mg |
| 2020 | 62 | 250 mg |
| 2021 | 47 | 250 mg |
| 2022 | 58 | 250 mg |
| 2023 | 48 | 200 mg |
| 2024 | 62 | 240 mg |
| 2025 | 65 | 200 mg |
Source: DSLD label entry dates and amounts, current labels.
In which products and brands?
Products listing phenylalanine by DSLD product type
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 25 of 25), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.
- XymoBoIX Natural Lemon FlavorXYMOGEN · off the market274.5 mg
- XymoBolX Natural Fruit Punch FlavorXYMOGEN · off the market260 mg
- XymoBolX Natural Lemon FlavorXYMOGEN260 mg