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Claim
Strong Support
causal
Analysis v4

Rhesus monkeys fed a reduced-calorie diet lived longer than the typical lifespan of 26 years seen in monkeys fed normally at the same research center.

19
Pro
0
Against

Mechanism

Synthesis from 1 study

How it works

Eating less slows down the body's energy use, which makes fewer harmful byproducts that damage cells. With less damage, cells can fix themselves better and stay healthy longer, so the body doesn't break down as quickly with age.

Most probable mechanism

In Simple Terms

Eating less lowers the amount of harmful molecules made during energy production, which reduces damage to cells and DNA. This lets cells repair themselves more effectively and stay functional longer, delaying the breakdown of tissues and organs that normally happens with age.

Causal chain
1

Reduced caloric intake lowers mitochondrial electron transport chain activity, decreasing reactive oxygen species production

Supported by evidence
which leads to
2

Lower reactive oxygen species levels reduce oxidative damage to proteins, lipids, and nuclear and mitochondrial DNA

Supported by evidence
which leads to
3

Decreased molecular damage enhances the efficiency of DNA repair mechanisms and proteostatic systems such as autophagy

Supported by evidence
which leads to
4

Improved cellular maintenance preserves tissue integrity and organ function across multiple systems including cardiovascular, metabolic, and neural

Supported by evidence
which leads to
5

Delayed decline in organ function extends the period of healthy physiological operation, increasing survival beyond the species-specific median lifespan

Supported by evidence

Evidence from Studies

Supporting (1)

19

Community contributions welcome

19

Caloric restriction reduces age-related and all-cause mortality in rhesus monkeys

Cohort Study
Animal
2014 Apr 1

Contradicting (0)

0

Community contributions welcome

No contradicting evidence found

Gold Standard Evidence Needed

According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.

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Source Study

Caloric restriction reduces age-related and all-cause mortality in rhesus monkeys

Score: 19
DOI: 10.1038/ncomms4557

Similar Assertions

In rhesus monkeys, reducing calorie intake lowers death rates from aging and increases lifespan, showing that how diet affects aging is similar in primates and other animals with shorter lives.

19
0
82%

Rhesus monkeys that ate 30% fewer calories than normal, starting between ages 7 and 14 and continuing for more than 20 years, died from age-related causes at 2.9 times lower rates and from any cause at 1.8 times lower rates than monkeys that ate without restriction.

19
0
82%

Rhesus monkeys in the NIA study weighed less than those in the Wisconsin study because they consumed fewer calories, and this difference in calorie intake explains why survival rates were similar between the two groups.

19
0
77%

Monkeys that eat fewer calories over many years stay more active as they age, while monkeys that eat normally become much less active over time.

16
0
77%

In rhesus monkeys, a diet with fewer calories does not raise the likelihood of dying from causes unrelated to aging, because the rate of such deaths relative to total lifespan is the same as in monkeys eating normally.

19
0
75%