Leptin
Here’s what it reflects — and what to do about it.
Longetic pulls together every lab and record you’ve had, follows how Leptin changes over time, and explains what’s shifting — so you walk into your next appointment prepared, with reminders for retests along the way.
What is Leptin?
A hormone made by fat tissue that helps signal your brain about the body's energy stores and appetite.
Leptin is a hormone released by fat (adipose) tissue, and the amount in the blood tends to rise and fall with how much body fat a person carries. Higher levels can be associated with higher body fat and with leptin resistance, where the brain responds less to the hormone's signals. Very low levels can be associated with low body fat or rare inherited leptin deficiency. Leptin is used mainly in research and specialist settings rather than everyday check-ups.
What to know about Leptin
Understanding Leptin means knowing what it reflects, what tends to move it, and the signs that suggest it’s worth a closer look — so you can bring the right questions to your next appointment.
This glossary entry is for informational purposes only and is not a substitute for professional medical advice. Read our Medical Disclaimer.
References
About our sources
Official sources
Government health agencies, national institutes, and intergovernmental bodies whose guidelines carry regulatory or policy weight.
Clinical / professional
Medical societies, specialty colleges, and professional associations whose consensus statements reflect clinical practice standards.
Peer-reviewed research
Original research articles and systematic reviews published in indexed journals and verified through PubMed or DOI.