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Claim
Strong Support
causal
Analysis v4

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...

19
Pro
0
Against

Mechanism

Synthesis from 1 study

How it works

Eating less slows down the body's energy use and reduces the buildup of harmful waste inside cells. This lets tissues stay healthier for longer, so the animals don't die younger even without extreme dieting.

Most probable mechanism

In Simple Terms

When less food is eaten, the body burns energy more slowly and produces fewer damaging molecules, which lets cells and tissues last longer without breaking down as fast.

Causal chain
1

Reduced caloric intake lowers circulating glucose and insulin levels, decreasing activation of nutrient-sensing pathways such as mTOR and IGF-1 signaling

Supported by evidence
which leads to
2

Lowered nutrient signaling reduces mitochondrial electron transport chain activity, decreasing production of reactive oxygen species

Supported by evidence
which leads to
3

Reduced oxidative stress limits accumulation of damaged proteins, lipids, and DNA in tissues such as liver, muscle, and brain

Supported by evidence
which leads to
4

Slowed accumulation of cellular damage preserves organ function and delays onset of age-related degeneration

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
79%

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
79%

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
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
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
74%