The Study
Adipose Tissue Resistance to the Antilipolytic Effect of Insulin and Niacin in Humans With Obesity.
This study looked at how two different things — insulin and niacin — affect fat release in 10 people with obesity or diabetes. It found that when one worked well in a person, the other usually did too. But it didn’t prove one causes the other — just that they seem to go together in these people.
Analysis score
Maximum 90 for a randomized controlled trial.
Where the score came from
Even when the body tries to stop fat from leaving fat cells using two different signals (insulin and niacin), people with obesity or diabetes often can't stop it — and if one signal fails, the other usually fails too.
Where does this study sit?
Reviews of RCTs (Meta-analyses)
Max 100Randomized Trials
Max 90Reviews of Cohort Studies
Max 85Cohort Studies
Max 72Reviews of Case-Control Studies
Max 63Case-Control Studies
Max 58Cross-Sectional & Case Series
Max 50Expert Opinion
Max 546 / 100
Quality score
Participants are randomly assigned to treatment or control groups, minimizing bias. The gold standard for testing whether an intervention causes an effect.
Key takeaways
Summary
Based on the study abstract and findings.
- 1Yes — this suggests the problem isn't just insulin resistance, but a deeper breakdown in the final 'off switch' for fat release, making weight loss harder.
- 2Insulin and niacin both reduced fat release by 93% in sync across people (r = −0.93), but niacin lowered key fat-control protein signals by 1% to 2% (P < 0.02), even though it still worked.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Diabetes
Year
2026
Authors
Shuhao Lin, K. Lytle, Nicola Fink, Michael D. Jensen
Related Content
Claims (10)
If fat is released from fat stores but not burned for energy, the total amount of fat in the body does not decrease.
In people with obesity or type 2 diabetes, injecting niacin decreases specific molecular signals in fat tissue that normally help prevent fat breakdown, even though niacin overall reduces fat breakdown.
In adults with upper-body obesity or type 2 diabetes, the ability of insulin to reduce free fatty acid release is strongly linked to the ability of niacin to do the same; if one fails to suppress free fatty acids in a person, the other is also unlikely to suppress them.
In people with obesity and type 2 diabetes, insulin and niacin reduce fat breakdown together in the same individuals, indicating that insulin resistance in fat tissue is not a separate, isolated problem.
In people with obesity or type 2 diabetes, the way their bodies respond to insulin and niacin in suppressing free fatty acids varies from person to person, but those who do not respond well to one of these agents typically also do not respond well to the other.
In adults with upper-body obesity or type 2 diabetes, the degree to which insulin reduces free fatty acid release from fat tissue is closely related to the degree to which niacin reduces the same release.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.