The Claim

Elevated insulin levels inhibit lipolysis by suppressing hormone-sensitive lipase activity.

Source: Insulin Resistance Doctor: Stop 16:8 Fasting Now (Do This Fasting Instead)

What the research says

Supports is higher

Support is ahead, but a single strong opposing study can change this.

Supports
42score
Challenges
0score

These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.

How it works
3 studies reviewed
In plain English

High insulin levels reduce the breakdown of fat by decreasing the activity of hormone-sensitive lipase.

See the scientific wording

Elevated insulin levels inhibit lipolysis by suppressing hormone-sensitive lipase activity.

Why this might work

When insulin levels rise, it turns off the enzyme that breaks down fat in fat cells. This happens because insulin triggers a chain of signals that removes activating tags from the fat-breaking enzyme, making it inactive. Without this enzyme working, fat stays stored instead of being released into the blood.

Verified mechanismbased on 3 studies

What the research says

3 studies
  1. Study: Adipose Tissue Resistance to the Antilipolytic Effect of Insulin and Niacin in Humans With Obesity.

    This study shows that when insulin levels go up, fat breakdown goes down—even in people with obesity or diabetes. So yes, high insulin stops fat from being broken down.

  2. Study: Use of a Two-stage Insulin Infusion Study to Assess the Relationship Between Insulin-Suppression of Lipolysis and Insulin-Mediated Glucose Uptake in Overweight/Obese, Nondiabetic Women

    When insulin is low, fat stays high in people whose bodies don’t respond well to insulin — meaning insulin isn’t doing its job of stopping fat breakdown. This shows high insulin should normally reduce fat release, but it doesn’t work well in some people.

  3. Study: Greater Suppression of Glucagon, Lipolysis, and Ketogenesis with Insulin Glargine U300 as Compared with Glargine U100 in Type 1 Diabetes Mellitus

    When insulin levels go up, the body slows down fat breakdown—and this study shows that a stronger insulin effect leads to less fat being released into the blood. So yes, high insulin means less fat burning.

Score breakdown, mechanism chain, raw evidence, ideal studies needed & 3 supporting studies

Fit Body Science verdict — we translate health claims into clear verdicts backed by peer-reviewed research.

Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.