Protein Restriction and Longevity: Can Limiting Protein Intake Support Healthy Aging?

University of Wisconsin researchers examine how reducing dietary protein intake may reshape nutrient sensing, metabolism, mitochondrial function, and other pathways linked to healthier aging.

(One of the leading authors on the Cell Press Blue article, Dr. Dudley Lamming | University of Wisconsin)

Researchers examine how restricting protein intake can improve metabolic health and influence aging-related pathways to extend healthspan and lifespan.

Aging &amp; Longevity

NAD+ (nicotinamide adenine dinucleotide) levels were lower among older adults with frailty—an age-related condition associated with increased vulnerability to disability, disease, and death.

Skin &amp; Muscle

The Harvard geneticist discussed an early human trial, unpublished mouse results, and an AI-assisted search for chemical rejuvenation therapies on the Joe Rogan Experience. 

Model: 20-month-old female C57BL/J mice 
Dosage: 10 nmol/kg/day of semaglutide

Semaglutide extends mouse lifespan and targets signs of aging, such as diminished NAD+, while mimicking the anti-aging effects of caloric restriction (consuming fewer calories). 


The study was led by Dr. Danica Chen (image: berkeley.edu). 

Model: Male C57BL/6J (B6) mice (15 months old at the start of treatment)
Dosage: Approximately 5 mg/kg/day of S-1-propenyl-L-cysteine (S1PC) was administered orally for 8 months, from 15 to 23 months of age. S1PC was given in chow containing 0.0025% S1PC, with a second experiment using drinking water to confirm the findings.

Researchers found that a compound found in garlic supports healthier muscle aging by boosting cellular defenses linked to longevity and maintaining physical performance.

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Protein Restriction and Longevity: Can Limiting Protein Intake Support Healthy Aging?

NAD+ Levels are Low Among Individuals with Frailty, New Japanese Study Shows

“Prophet of Longevity” David Sinclair Reveals New Anti-Aging Data

Semaglutide (Ozempic) Prolongs Lifespan & Boosts NAD+ in Mice, New Study Shows

Garlic-Derived Compound Activates a Natural Anti-Aging Pathway That Preserves Muscle Function