Intermittent Fasting (IF/TRE) for ALS
Also known as: IF, Time-restricted eating, TRE, 16:8 fasting, 5:2 diet
IF's autophagy activation may clear protein aggregates, but caloric restriction in ALS is controversial due to weight loss concerns.
Mechanism of Action
IF activates autophagy for TDP-43/SOD1 aggregate clearance. However, ALS patients are at high risk of malnutrition and weight loss (strong negative prognostic factor). Modified IF protocols maintaining caloric intake while providing fasting benefits are being explored.
General mechanism: Temporal caloric restriction. AMPK activation, mTOR inhibition, autophagy induction, SIRT1 activation, ketogenesis, differential stress resistance.
Current Evidence
Autophagy mechanism relevant but caloric concerns limit clinical application. High-calorie TRE (maintaining calories in feeding window) may provide autophagy benefits without weight loss risk.
Clinical Status: Theoretical. Caloric management paramount in ALS. Modified protocols needed.
Safety Profile
Generally safe for healthy individuals. Contraindicated in eating disorders. ALS: caloric maintenance critical. Diabetics: medication adjustment needed.
Key Research Questions
- Can time-restricted eating maintain calories while activating autophagy in ALS?
- Does IF-mediated autophagy clear TDP-43 aggregates without worsening ALS malnutrition?