L-Phenylalanine

Suggested Use

DIRECTIONS: One to two (1-2) capsules daily as a dietary supplement; or as directed by a Doctor. Best taken between meals.

• 

  Nutricost L-Phenylalanine Capsules

  iHerb4.7(210)

  $12.95
• 

  Metabolic Maintenance L- Tryptophan 500mg 60 Capsules

  iHerb4.7(46)

  $40.00
• 

  Phenylalanine Crystalline Amino Acid Combination

  Prescribed For Life

  $94.99
• 

  DL-Phenylalanine Pure Encapsulations

  Pure Prescriptions4.6(28)

  $35.50
• 

  Allergy Research Group R.E.M. Maintenance

  Walmart - Pattern4.3(20)

  $56.00
• 

  L-Phenylalanine Powder

  Nootropics Depot

  $19.99
• 

  Solaray L-Phenylalanine 500 mg 60 Capsules

  Solaray4.8(32)

  $15.69
• 

  Life Extension D,L-Phenylalanine Capsules

  iHerb4.7(501)

  $14.25

Enter your city or ZIP code to find supplement & health stores in your area that may carry this product.

Showing representative supplement & health retailers — search above for stores in your area.

• The Vitamin Shoppe

  4.3 (92)

  Vitamin & supplements store

  10000 US-20 A, Perrysburg, OH 43551

  Directions(419) 874-3104

• Supreme Supplements

  4.9 (67)

  Vitamin & supplements store

  4925 Jackman Rd #07, Toledo, OH 43613

  Directions(419) 214-0405

• GNC

  4.0 (26)

  Vitamin & supplements store

  1498 Spring Meadows Dr D111, Holland, OH 43528

  Directions(419) 867-4069

• Health Yourself Perrysburg

  4.7 (31)

  Health food store

  10075 Fremont Pike, Perrysburg, OH 43551

  Directions(419) 874-3355

• Sips Nutrition - Protein and Energy Bar

  5.0 (24)

  Candy store

  5950 Airport Hwy, Toledo, OH 43615

  Directions

• NutriToledo

  4.7 (63)

  Vitamin & supplements store

  3606 W Sylvania Ave Ste 12, Toledo, OH 43623

  Directions(419) 442-0336

• Spartans Nutrition

  4.9 (48)

  Health food store

  2039 W Laskey Rd, Toledo, OH 43613

  Directions

• Health Foods by Claudia

  4.5 (341)

  Health food store

  3904 Secor Rd, Toledo, OH 43623

  Directions(419) 474-2400

• Phenylalanine homeostasis in metabolic disorders: epidemiological trends, pathophysiological mechanisms, and clinical treatment

  Y Chen, S Lu, C Li, Y Li, C Qin, Y He, Y Niu… - Frontiers in …, 2026 - frontiersin.org

  … medical perspective, abnormal Phe metabolism is an important pathological basis of phenylketonuria (PKU). This inherited metabolic … L-Phenylalanine promotes liver steatosis by …

  2026

• Disorders of phenylalanine and tyrosine metabolism

  H Alsharhan, C Ficicioglu - Translational Science of Rare …, 2020 - journals.sagepub.com

  … ) with synthetic, phenylalanine – free formula and medical food to provide all other nutrients … and health maintenance [46]. A wide range of Phe-free formulas and low protein medical …

  202040 citations

• Effects of L-phenylalanine on energy intake and glycaemia—impacts on appetite perceptions, gastrointestinal hormones and gastric emptying in healthy …

  PCE Fitzgerald, B Manoliu, B Herbillon, RE Steinert… - Nutrients, 2020 - mdpi.com

  … Such studies would need to evaluate whether the effects observed in healthy people in the current study are maintained in people with obesity and/or type 2 diabetes. Moreover, since …

  202032 citations

• Phenylalanine metabolism

  AE Harper - Aspartame, 2020 - taylorfrancis.com

  … metabolic products or, when food intake is depressed, to the lack of tyrosine or its metabolic … Comparison of the metabolism of uniformly 14c-labelled L-phenylalanine, L-tyrosine and L-…

  202056 citations

• Emerging therapeutic and cosmeceutical applications of phenylalanine and its metabolites

  Z Liao, T Parumasivam, Z Xiao, X Zhu… - Cutaneous and …, 2026 - Taylor & Francis

  Objective This review aims to comprehensively examine and integrate the extant knowledge pertaining to phenylalanine (Phe) and its key metabolites, namely tyrosine (Tyr), …

  2026

• L-Phenylalanine promotes liver steatosis by inhibiting BNIP3-mediated mitophagy

  Y Sun, L Cai, B Yu, H Zhang, Z Zhang, X Xu, Y Yu… - Molecular …, 2025 - Springer

  … L-Phenylalanine (L-Phe) levels are elevated in patients with metabolic dysfunction-associated steatotic liver disease (MASLD). However, whether L-Phe induces liver steatosis and the …

  20255 citations

Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2013-08-23. DSLD Label ID: 24912. This information is provided for educational reference only and is not medical advice. Always follow the product label and consult a doctor or pharmacist before use.