Amino Complex 500 mg by Quest is a protein supplement containing 18 ingredients, primarily amino acids derived from Hydrolyzed Casein. Key ingredients like L-Leucine (41mg), L-Arginine (18mg), and Glycine (12mg) are present at clinical doses, while L-Tyrosine (28mg) is considered underdosed for typical clinical effects. The product achieves an N+ Score of 66 and a 'D' grade, indicating an average quality. While it provides a broad spectrum of amino acids, the dosages for some may not align with research-backed clinical efficacy. This product could be considered by those seeking a general amino acid blend, acknowledging the varying ingredient dosages.
About This Product
Amino Complex 500 mg by Quest is a protein supplement containing 18 active ingredients. It has earned an N+ Score of 66/100 (Grade D).
This product features a fully transparent label with individual ingredient amounts disclosed, and key ingredients are present at clinically effective doses based on peer-reviewed research.
Notable clinical-dose ingredients include L-Arginine, Glycine, L-Leucine.
N+ Score Breakdown
Are key ingredients present at clinically effective doses based on research?
Does the product include all expected ingredients for its supplement category?
Are individual ingredient amounts clearly disclosed without proprietary blends?
Does the formula include a breadth of beneficial compounds from multiple pathways?
Strengths
- +Key ingredients at clinically effective doses
- +Fully transparent label with individual ingredient amounts disclosed
- +Broad ingredient diversity exceeding category norms
- +3 ingredient(s) at clinical dose levels
- +Rich formula with 18 active ingredients
Weaknesses
- −Missing several expected ingredients for its category
Ingredient Analysis (18 ingredients)
| Ingredient | Amount | Dose Adequacy |
|---|---|---|
| L-Lysine | 36.500 mg | N/A |
| L-Arginine | 18.000 mg | Optimal |
| Glycine | 12.000 mg | Optimal |
| L-Tyrosine | 28.000 mg | Under |
| L-Leucine | 41.000 mg | High |
| L-Isoleucine | 27.000 mg | N/A |
| L-Valine | 32.000 mg | N/A |
| L-Methionine | 12.500 mg | N/A |
| L-Serine | 28.000 mg | N/A |
| L-Proline | 50.500 mg | N/A |
| L-Threonine | 21.500 mg | N/A |
| L-Phenylalanine | 22.000 mg | N/A |
| L-Histidine | 13.500 mg | N/A |
| Alpha-Glucan Oligosaccharide | 1.500 mg | N/A |
| L-Glutamic Acid | 100.000 mg | N/A |
| L-Alanine | 13.000 mg | N/A |
| Hydrolyzed Casein | 500.000 mg | N/A |
| L-Aspartic Acid | 31.500 mg | N/A |
Clinical ranges based on NIH ODS Fact Sheets and peer-reviewed research. Status indicates whether the amount meets evidence-based thresholds.





