The Claim
In C57BL/6 mice, the decline in basal metabolic rate during calorie restriction is proportional to the severity of the restriction and is fully accounted for by reductions in liver, spleen, pancreas, tail, and brown adipose tissue mass, while protein restriction at equivalent caloric levels does not reduce basal metabolic rate.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
In C57BL/6 mice, reducing calorie intake lowers basal metabolic rate in proportion to how much food is cut, and this drop is entirely explained by the loss of mass in the liver, spleen, pancreas, tail, and brown fat; however, reducing protein intake without changing total calories does not lower basal metabolic rate.
See the scientific wording
In C57BL/6 mice, the basal metabolic rate decline during calorie restriction is proportional to the severity of restriction and is fully accounted for by reductions in liver, spleen, pancreas, tail, and brown adipose tissue mass, whereas protein restriction at equivalent caloric levels does not reduce BMR.
When less food is eaten, the liver, spleen, pancreas, tail, and brown fat shrink in size, and because these organs use a lot of energy, the body burns fewer calories at rest. When the same number of calories come from food with less protein, these organs do not shrink, so the body keeps burning the same amount of energy.
What the research says
1 studyWhen mice eat less food, their metabolism slows down because organs like the liver and spleen get smaller — and that’s all that’s happening, not some hidden slowdown in cells. But the study didn’t test what happens when mice eat the same calories but less protein.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.