Leucine
Leucine activates TOR-S6K, accelerating aging
Why It Matters for Longevity
Leucine activates TOR-S6K, accelerating aging Leucine is a potent activator of the mTOR/TOR-S6K signaling complex, which promotes cell growth and accelerates aging when chronically elevated. Dietary leucine restriction extends lifespan and healthspan in mice by reducing mTORC1 signaling and improving metabolic flexibility. (Cell Metabolism, 2012 (PMID 22560220)) Chronic leucine supplementation accelerates cellular senescence markers via sustained mTOR activation; episodic leucine intake shows less aging impact. (Aging Cell, 2014 (PMID 24341874))
How to Use It
Pairs well with legumes, whole grains, fish. Use as a nutrient in your daily meals according to the Longevity Diet guidelines.
What to Pair It With
| Ingredient | Why | Tradition |
|---|---|---|
| legumes | See synergies | nutritional science |
| whole grains | See synergies | nutritional science |
| fish | See synergies | traditional |
Synergies
- Legumes (complement): Plant-based leucine from legumes provides episodic mTOR stimulation without chronic excess - Olive Oil (complement): Oleic acid moderates mTOR signaling, partially buffering leucine's pro-aging effects - Fish (synergy): Fish provides leucine alongside omega-3s that modulate inflammatory pathways downstream of mTOR
Flavor Profile
Taste: bitter, slightly sweet. Aroma: neutral. Texture: crystalline powder (supplement form). Category: amino acid / nutrient.
The Science
- Cell Metabolism, 2012 (PMID 22560220): Dietary leucine restriction extends lifespan and healthspan in mice by reducing mTORC1 signaling and improving metabolic flexibility. - Aging Cell, 2014 (PMID 24341874): Chronic leucine supplementation accelerates cellular senescence markers via sustained mTOR activation; episodic leucine intake shows less aging impact. - Book claim (high confidence): Leucine activates TOR-S6K, accelerating aging
Key Nutrients
| Nutrient | Per 100g | Notes |
|---|---|---|
| L-Leucine (branched-chain amino acid) | varies by food source | Highest mTOR-activating BCAA; bioavailability near 100% from animal sources |
| mTORC1 activator | N/A | Even small doses (1-3g) trigger robust mTOR activation; chronic excess linked to accelerated aging |
| Muscle protein synthesis trigger | N/A | Threshold ~0.7g per meal for muscle protein synthesis; context-dependent benefit vs. aging risk |