Leptin is a hormone produced by fat cells that signals fullness to the brain and helps regulate appetite and energy expenditure. It is measured to assess metabolic function and the body's energy balance, particularly in weight management and metabolic disorders.
Leptin is a hormone produced by fat cells that signals fullness to the brain and helps regulate appetite and energy expenditure. It is measured to assess metabolic function and the body's energy balance, particularly in weight management and metabolic disorders.
When elevated: Elevated leptin often occurs with obesity and excess body fat, as leptin levels correlate with total fat mass. High leptin can indicate leptin resistance, where the body does not respond properly to the hormone's appetite-suppressing signals, leading to continued overeating despite adequate energy stores. When low: Low leptin is uncommon in otherwise healthy adults but can occur with severe caloric restriction, malnutrition, or very low body fat. It may also be seen in certain genetic conditions and is associated with increased hunger and metabolic slowdown.
Leptin reflects energy availability and metabolic stress—relevant when training intensity or dietary restriction limits caloric intake relative to expenditure. Low leptin can signal inadequate energy for recovery, immune function, and hormonal balance; tracking it helps athletes avoid overtraining syndrome and optimize fueling strategies for performance and long-term health.
Turnaround Time
4 days (up to 9 days)
Method
Enzyme immunoassay (EIA)
Order online
Choose your lab and check out. We send your lab requisition automatically — no doctor visit needed.
Get your sample collected
Visit a lab service center near you for a quick blood draw (or book at-home phlebotomy where available).
See your results
Your results land in your Insider portal, ready to review and act on — that easy.
Your price
$26.00$80
3.1× less than retail
Versus the typical direct-to-consumer retail price for this test (illustrative — consumer prices vary by provider and region).
$26.00
$50.00
Peer-reviewed sources supporting the educational content on this page.
Leptin is a hormone produced by fat cells that signals fullness to the brain and helps regulate appetite and energy expenditure. It is measured to assess metabolic function and the body's energy balance, particularly in weight management and metabolic disorders.
Leptin is a hormone produced by fat cells that signals fullness to the brain and helps regulate appetite and energy expenditure. It is measured to assess metabolic function and the body's energy balance, particularly in weight management and metabolic disorders.
When elevated: Elevated leptin often occurs with obesity and excess body fat, as leptin levels correlate with total fat mass.
The Leptin test starts at $26.00 at Labcorp or Quest. No doctor's visit and no insurance needed; we do not bill insurance. Fitomics Insider members pay from $23.00.
Results for the Leptin test are typically ready about 4 days after your draw, and up to 9 days for some samples. Your results land in your Insider portal.
No. When you order the Leptin test from Fitomics Research Labs, a licensed physician in our 50-state network reviews and signs your requisition after checkout, and it lands in your portal and inbox. Then visit any Labcorp, Quest, or BioReference patient service center for your draw; results post to your Insider portal.
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