Free L-Leucine
- Nutritional / formulation function
- Dietary essential amino acid; participates in protein synthesis and energy metabolism.
- Mechanism investigated
- Nutrient signaling associated with mTORC1 through amino-acid sensors, including Sestrin/GATOR/Rag axes; response depends on context and availability of other amino acids.
- Evidence type / population
- Human-literature review across aging, exercise, and disuse; ingredient level, not product evidence. Multiple populations and protocols covered by the review; no DK-7.4 population has been studied.
- Study duration
- Varies across studies; no single duration transfers to the formulation.
- Limits / relevance to DK-7.4
- Response depends on dose, meal, total protein, age, exercise, and study design. Product exposure and threshold are not inferred.
- DOI · LIT
- 10.1016/j.clnu.2023.08.010