Hormonal
Aging significantly reduces sympathetic nervous system (SNS) drive to brown adipose tissue (BAT), leading to diminished metabolic BAT activity, whereas obesity alone does not impair SNS drive or metabolic activity.
If you are older, your body's natural signal to burn fat via brown fat (triggered by cold) is weaker than it was when you were young. This is not because you are obese, but because of age-related neural changes. Standard cold exposure might be less effective for you than for a young person, suggesting that interventions specifically targeting sympathetic nerve activity might be necessary to activate your brown fat.
We found a lower SNS activity in the older men than in the lean young men, which may be the explanation for the lower metabolic BAT activity... A lower sympathetic drive may explain the lower BAT activity in the older men but not in the obese men.
Why this rating
Observational study with small sample size (n=35) and specific demographic constraints (healthy men).
Source
Differences in Sympathetic Nervous Stimulation of Brown Adipose Tissue Between the Young and Old, and the Lean and Obese
Lonneke Bahler et al. · Journal of Nuclear Medicine · 2015
DOI 10.2967/jnumed.115.165829
Related findings · Hormonal
- Initial treatment for type 2 diabetes should be a combination of metformin and either an SGLT-2 inhibitor or a GLP-1 receptor agonist to achieve cardiorenal protection, rather than monotherapy or older agents like sulfonylureas.Strong
- For patients with specific monogenic obesity syndromes (leptin deficiency, POMC/PCSK1/LEPR mutations), targeted pharmacotherapy (recombinant leptin or setmelanotide) is highly effective and should be prioritized, unlike in polygenic obesity.Strong
- Continued weekly administration of 2.4 mg subcutaneous semaglutide prevents weight regain and promotes further weight loss in adults with overweight or obesity, whereas switching to placebo results in significant weight regain.Strong
This is one finding among thousands. Every one is graded and traced to its source, so you can see what the evidence actually supports. Browse the research →