The Claim
Skeletal muscle insulin resistance during weight regain occurs independently of intramuscular fat accumulation and is driven by local hypothyroidism, resulting in glucose redistribution toward fat storage.
What the research says
Roughly balanced
Support and challenge are close. The picture may shift as more studies come in.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
During weight regain, skeletal muscle becomes resistant to insulin without an increase in fat inside muscle cells, and this is caused by reduced thyroid hormone activity locally, which redirects glucose to be stored as fat.
See the scientific wording
Skeletal muscle insulin resistance during weight regain occurs independently of fat accumulation in muscle fibers and may be driven by local hypothyroidism, contributing to glucose redistribution toward fat storage.
After weight loss, muscle tissue reduces its thyroid hormone activity, which slows down its ability to use sugar for energy. This causes sugar to build up in the blood, prompting the pancreas to release more insulin. The high insulin levels force the excess sugar into fat cells, where it is turned into fat, while the muscle remains resistant to insulin and does not take up sugar effectively.
What the research says
1 studyAfter losing weight, some people’s muscles become less able to use sugar for energy, even if they don’t get more fat inside the muscles. This study shows that a slowdown in thyroid activity in the muscles may be why sugar gets redirected to fat cells instead.
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.