Medical and Lifestyle Causes of Weight Gain
Weight gain rarely has one cause. Biology, environment, sleep, medications, health conditions, food access and activity can interact, and blame is not a treatment plan.

Potential contributors
Biology
Genetics, appetite regulation, aging and metabolic adaptation.
Medical factors
Sleep apnea, endocrine or reproductive conditions and weight-promoting medicines.
Environment
Food access, schedule, stress, caregiving, mobility and sleep opportunity.
Testing is selected from the history and examination; indiscriminate hormone panels are not automatically useful.
How W8MD can help
W8MD considers the condition in the context of weight history, current medicines, nutrition, sleep, physical ability, prior attempts, preferences, coverage and cost. Treatment may include lifestyle care, medical nutrition support, prescription options and related sleep evaluation when appropriate.
Care coordination
W8MD weight management complements rather than replaces primary care or specialist treatment. Laboratory tests are individualized. Patients should not independently reduce glucose, blood-pressure, psychiatric, thyroid or other medicines as weight or food intake changes.
Request a W8MD evaluation
Brooklyn: 718-946-5500 · Northeast Philadelphia: 215-676-2334
Calling is fastest. Use the form only for a non-urgent callback request and do not submit private medical, insurance, financial or other sensitive information.
Medical notice: Educational information only. The first visit is in person. W8MD does not promise a diagnosis, test, prescription, insurance approval or result. Medication changes must be coordinated with the responsible clinician. Call 911 for an emergency.
Content reviewed for general accuracy by W8MD clinical leadership. Last reviewed September 2026.
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