Phenylalanine

Generally Safe OtherSynthetic

Phenylalanine is a synthetic other used in dietary supplements. Safety rating: Generally Safe. It is generally considered safe for most people at standard doses. Found in 9 supplements in the GoodSupp database. Phenylalanine is an essential amino acid.

9 Products use this
Generally Safe Safety rating
Other Category
No Natural origin

Safety Verdict: Generally Safe

Avoid in individuals with phenylketonuria (PKU).

What is Phenylalanine?

Phenylalanine is an essential amino acid.

Common Names Phenylalanine, L-Phenylalanine, D-Phenylalanine
Type Other
Origin Synthetic / Manufactured
Safety Rating Generally Safe

Why is Phenylalanine used in supplements?

It is included for its nutritional value.

Role in supplements: Other — serves a functional role in supplement formulation.

Should you be concerned about Phenylalanine?

Generally no. Phenylalanine is considered safe for most people at typical supplement doses. Some individuals may want to be aware of minor sensitivities.

Avoid in individuals with phenylketonuria (PKU).

Low risk. Generally safe for most people in supplement amounts.

Top-rated products containing Phenylalanine

These 9 highest-scoring supplements in our database use Phenylalanine.

NutraBio EAA, Strawberry Lemonade, 0.88 lb (401 g)
NutraBio EAA, Strawberry Lemonade, 0.88 lb (401 g)
Product 82 Brand N/A
NutraBio Intra Fuel Leg Day™, Peachy Glutes Peach Mango, 2.05 lb (930 g)
NutraBio Intra Fuel Leg Day™, Peachy Glutes Peach Mango, 2.05 lb (930 g)
Product 77 Brand N/A
MuscleTech Platinum 100% EAA+, Fruit Punch, 13.86 oz (393 g)
MuscleTech Platinum 100% EAA+, Fruit Punch, 13.86 oz (393 g)
Product 76 Brand N/A
Birdman Falcon Organic Plant Chocolate Protein Powder
Birdman Falcon Organic Plant Chocolate Protein Powder
Product 70 Brand N/A
Vanilla Marine Collagen & Hyaluronic Acid Beauty Protein Dietary Supplement
Vanilla Marine Collagen & Hyaluronic Acid Beauty Protein Dietary Supplement
Product 62 Brand N/A
Full Circle Market Whey Protein Powder
Full Circle Market Whey Protein Powder
Product 60 Brand N/A
Femfuelz Whey Protein
Femfuelz Whey Protein
Product 60 Brand N/A
Zammex Hydrolyzed Bone Broth Protein
Zammex Hydrolyzed Bone Broth Protein
Product 59 Brand N/A
Optimum Nutrition Essential Amin.O. Energy®, Tropical Sunrise, 9.5 oz (270 g)
Optimum Nutrition Essential Amin.O. Energy®, Tropical Sunrise, 9.5 oz (270 g)
Product 57 Brand N/A
Related Ingredients
3-0-Ethyl Ascorbic Acid Generally Safe 3-O-Ethyl Ascorbic Acid Generally Safe Acetyl Glucosamine Generally Safe Acetyl Hexapeptide-8 Generally Safe Adenosine Generally Safe Adhesive Caution Alanine Safe Alfalfa Leaf Generally Safe
Frequently Asked Questions
Is Phenylalanine safe in supplements?

Phenylalanine is rated generally safe for most people at amounts commonly found in supplements. While the overall safety profile is favorable, some individuals may experience minor sensitivities. Avoid in individuals with phenylketonuria (PKU). In GoodSupp's database, 9 products contain this ingredient. Consult your healthcare provider if you have specific concerns.

What is Phenylalanine and why is it in my supplement?

Phenylalanine is an essential amino acid. It appears in 9 products in the GoodSupp database.

Is Phenylalanine natural or synthetic?

Phenylalanine is synthetically produced, meaning it is manufactured through chemical processes rather than directly extracted from natural sources. Synthetic ingredients are extremely common in supplements and are not inherently less safe than natural alternatives. In many cases, synthetic production allows for higher purity and more consistent quality. The FDA regulates both natural and synthetic supplement ingredients under the same safety standards. GoodSupp rates ingredients based on their actual safety data regardless of whether they're natural or synthetic.

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Disclaimer: GoodSupp provides independent supplement quality analysis for informational purposes only. Scores are generated algorithmically based on ingredient profiles, brand certifications, and public records. This is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Product data is sourced from manufacturer labels and public databases. GoodSupp is not affiliated with any supplement brand.