Doctor's Assessment Included

Every result includes a professional assessment from a BIG-registered doctor. For treatment decisions, discuss your results with your GP.

Allergy & Intolerance

Leptin

Leptin testing offers insight into your appetite regulation system. As part of a metabolic health panel, it helps identify leptin resistance and guides lifestyle interventions.

What It Measures

This test measures the concentration of leptin in your blood. Leptin levels generally correlate with body fat percentage. The test helps assess whether appetite-regulating hormone signalling is functioning properly.

Why It Matters

Understanding leptin levels provides insight into metabolic health and appetite regulation. Leptin resistance is associated with obesity, metabolic syndrome, and difficulty losing weight.

When to Test

Consider leptin testing if you are struggling with weight management despite efforts, have suspected metabolic syndrome, or as part of a comprehensive metabolic health assessment.

Symptoms

Low Levels

Very low leptin (rare) may be associated with excessive hunger, overeating, and severe early-onset obesity due to congenital leptin deficiency.

High Levels

Elevated leptin is commonly seen in obesity and may indicate leptin resistance. Despite high levels, the brain does not receive the satiety signal effectively, contributing to persistent hunger.

Lifestyle Tips

Improving leptin sensitivity involves regular physical activity, adequate sleep (7-9 hours), managing stress, reducing processed food intake, and a balanced diet rich in fibre and protein. Weight loss itself helps restore leptin sensitivity.

Frequently Asked Questions

What is leptin resistance?

Leptin resistance occurs when the brain stops responding effectively to leptin despite high circulating levels, impairing the satiety signal.

Can leptin be used as a weight loss treatment?

Leptin therapy only works for the very rare congenital leptin deficiency. For common obesity with leptin resistance, supplementing leptin does not help.

Does sleep affect leptin levels?

Yes. Sleep deprivation reduces leptin and increases ghrelin (hunger hormone), which may increase appetite. Adequate sleep supports healthy leptin function.