L-Phenylalanine

Origin of Ingredient

Occurs naturally in foods or human metabolism; supplement-grade material is commonly produced by fermentation or chemical synthesis.

History of Ingredient

L-Phenylalanine became established in sports and performance nutrition as biochemical and exercise research clarified its role or potential physiological effects. Modern products use controlled-purity powders, salts or blends.

Scientific Makeup of Ingredient

Defined amino acid, metabolite, salt or performance-nutrition compound; chemical form and assay should be confirmed from the supplier specification.

UK Legal Claim

No specific authorised GB/EU health claim identified in this review for the ingredient as named. Do not convert scientific evidence into a consumer health claim unless the exact substance/claim is authorised or a valid transitional/on-hold botanical position applies. Conditions: Verify exact substance, dose, target population, food category and wording in the current register before use.

EU Legal Claim

No specific authorised GB/EU health claim identified in this review for the ingredient as named. Do not convert scientific evidence into a consumer health claim unless the exact substance/claim is authorised or a valid transitional/on-hold botanical position applies. Conditions: Verify exact substance, dose, target population, food category and wording in the current register before use.

US Legal Claim

FDA does not pre-approve ordinary dietary-supplement structure/function claims. Example for regulatory review only (NOT FDA-approved wording): “Supports normal energy and metabolic function.” The marketer must hold substantiation, avoid disease claims, use the DSHEA disclaimer and notify FDA within 30 days after first marketing.

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August 24, 2024

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