GoKawiilRIKEN study finds protein memory in fruit flies linked to lifespan
Researchers led by Fumiaki Obata at RIKEN's Center for Biosystems Dynamics Research reduced yeast (protein) content in fruit fly larvae's diet from 8% to 1-2% during the mid-larval stage, then returned them to normal food as adults. The protein-restricted flies lived longer than well-fed siblings but were lighter, paler, and laid fewer eggs; adding amino acids back to the larval diet erased the longevity benefit, suggesting the body retains a 'nutritional memory' of early diet.
GoKawiil's interpretation of the reporting above, not reported fact.
The findings could help explain the decades-old observation that dietary restriction in youth extends lifespan across species, by identifying a biological memory mechanism rather than just ongoing calorie effects. This suggests researchers might eventually pinpoint specific proteins or pathways that could be targeted to extend lifespan without requiring lifelong dietary restriction, though this remains speculative and unproven in mammals.
- Reducing larval yeast intake from 8% to 1-2% extended adult fruit fly lifespan.
- The longevity effect was reversed when amino acids were added back to larval food, revealing a diet-linked 'nutritional memory'.
- Longer-lived flies were smaller, paler, and less fertile, reflecting a lifespan-reproduction tradeoff.
Source: arstechnica.com, 2026-09-29
Published there as: “Less protein for maggots means longer lives for fruit flies”
Read the original report → The summary and analysis above are GoKawiil's own, written from reporting by the source above. Facts and quotes belong to the original publisher.