Metabolic therapy · incretin receptor agonist

GLP-1 therapy, appetite regulation and clinically guided weight loss.

GLP-1 therapy uses incretin receptor agonists (semaglutide and tirzepatide) to regulate appetite, slow gastric emptying, and improve insulin sensitivity. The medication class is FDA-approved for type 2 diabetes and chronic weight management, with the strongest weight-loss evidence base of any currently available pharmacotherapy. We position it as a clinical tool inside a physician-led metabolic program, not a standalone shortcut.

Woman administering GLP-1 therapy injection for medical weight management in a wellness clinic setting

What it is

GLP-1 therapy refers to a class of injectable medications that activate the glucagon-like peptide-1 receptor, the hormone receptor that signals satiety after a meal. The two molecules used most commonly in modern weight-management practice are semaglutide (Wegovy for chronic weight management, Ozempic for type 2 diabetes) and tirzepatide (Zepbound for chronic weight management, Mounjaro for type 2 diabetes), a dual GIP and GLP-1 receptor agonist developed by Eli Lilly.

Both are FDA-approved, manufactured under standard pharmaceutical conditions, and prescribed by your Genesis provider following a Good Faith Exam and clinical evaluation. We prioritize the branded FDA-approved products where access and insurance allow.

How it works

Central appetite regulation. GLP-1 receptors in the hypothalamus and brainstem modulate hunger and satiety. Activation reduces appetite, food preoccupation, and meal size. Patients commonly report a quieting of food-related cravings within the first weeks of titration.

Slowed gastric emptying. Delayed gastric emptying prolongs post-meal satiety and reduces post-prandial glucose excursions. This same mechanism produces the most common side effect (nausea) during titration.

Glucose-dependent insulin response. GLP-1 agonists augment insulin secretion only when blood glucose is elevated, which is why hypoglycemia risk is low compared with sulfonylureas or insulin. Glucagon suppression contributes to improved fasting glucose.

Pivotal trial evidence. The STEP trials (semaglutide 2.4 mg weekly) demonstrated mean weight reduction of approximately 15 percent over 68 weeks in adults with obesity. The SURMOUNT-1 trial (tirzepatide 15 mg weekly) demonstrated mean weight reduction of approximately 20 percent over 72 weeks. Both consistently outperform older anti-obesity medications.

Conditions and use cases

Indications and clinical fit.

  • Chronic weight management in adults with BMI ≥30, or BMI ≥27 with at least one weight-related comorbidity (FDA-approved).
  • Type 2 diabetes management (FDA-approved). Often used alongside other anti-diabetic therapy under endocrinology supervision.
  • Adjunct to a structured nutrition, sleep, and resistance-training program. We do not position GLP-1 therapy as a substitute for those foundations.
  • Patients with a history of medullary thyroid carcinoma, MEN-2, or active pancreatitis should not use GLP-1 therapy.

Expected timeline

What patients commonly observe.

  1. Week 0 to 4

    Titration begins

    Low starting dose with planned step-ups every 4 weeks. Nausea, fullness, and mild GI symptoms are most common in this window and typically improve.

  2. Month 1 to 3

    Early response

    Most patients see meaningful appetite changes by week 8 to 12. Initial weight reduction emerges. Provider reviews tolerance and clinical response.

  3. Month 3 to 6

    Maintenance titration

    Dose advanced to therapeutic range based on tolerance, response, and goals. Most weight reduction in trials occurs across the first 6 to 9 months.

  4. Month 6 and beyond

    Sustained therapy

    Long-term continuation is typical, since discontinuation is associated with weight regain. Cadence and dose are individualized.

Stacks that include this therapy

GLP-1 therapy appears in this stack.

Investment and access

Care plans, not menus.

Genesis Longevity therapies are dispensed only after a complimentary consultation and Good Faith Exam. Schedule yours to receive a personalized plan tailored to your biology and goals.

Side effects

What patients commonly report.

Common. Nausea, decreased appetite, fullness, mild constipation or diarrhea, fatigue, injection-site reactions. Most symptoms occur during titration and improve over time.

Less common. Gallbladder events (cholelithiasis), dehydration if intake drops sharply, transient elevations in lipase. Body-composition shifts can include muscle loss when protein intake is insufficient.

Rare but serious. Acute pancreatitis, severe gastroparesis, allergic reaction. Discontinue and contact your provider for persistent severe abdominal pain. A boxed warning exists for thyroid C-cell tumors observed in rodent studies; relevance to humans is uncertain.

Contraindications

Who should not use this therapy.

Show contraindications

Absolute. Personal or family history of medullary thyroid carcinoma. Multiple endocrine neoplasia syndrome type 2 (MEN-2). Known hypersensitivity to semaglutide, tirzepatide, or excipients. Pregnancy and breastfeeding.

Relative. History of pancreatitis. Severe gastroparesis. Active gallbladder disease. Type 1 diabetes (not first-line). Eating disorder history (requires careful evaluation before initiation).

Pairs well with

Therapies that complement this protocol.

Frequently asked

Frequently asked questions about GLP-1 therapy.

Sources

Citations & references

  1. [1]Wilding JPH et al. Once-weekly semaglutide in adults with overweight or obesity. NEJM 2021;384:989–1002 (STEP-1). Source
  2. [2]Jastreboff AM et al. Tirzepatide once weekly for the treatment of obesity. NEJM 2022;387:205–216 (SURMOUNT-1). Source
  3. [3]FDA, Wegovy (semaglutide) injection prescribing information. Source
  4. [4]FDA, Zepbound (tirzepatide) injection prescribing information. Source

Status & disclosures

FDA-approved
Semaglutide (Wegovy, Ozempic) and tirzepatide (Zepbound, Mounjaro) are FDA-approved. Genesis prescribes the branded FDA-approved products where access and insurance allow.
503A compounded alternative
Compounded semaglutide is available in some clinical contexts and is prepared by licensed 503A pharmacies. Genesis discloses when a compounded preparation is used in place of the branded product.
Long-term clinical relationship
Discontinuation is commonly followed by weight regain. We frame GLP-1 therapy as ongoing clinical care with structured nutrition, resistance training, and physician supervision, not as a short-term intervention.

Next step

Talk to a Genesis provider about GLP-1 therapy.

Schedule a consultation. Physician-led, evidence-graded.

Or keep reading: See the Weight Loss & Wellness stack