Section 1 of 6
Clinical Realities
What the research actually says about the questions GLP-1 patients ask most — from muscle loss and weight regain to fertility, drug interactions, and nutritional gaps. 12 topics, 25+ peer-reviewed sources, zero hype.
Will I lose muscle?
A measurable proportion of weight lost comes from lean tissue — roughly 25–40% — consistent with any significant caloric deficit, not a unique drug effect.
Read the evidenceWhat happens when I stop?
Weight regain after stopping follows a predictable physiological pattern — substantial but not complete, with roughly 60% regained by one year.
Read the evidenceCan I get pregnant on Mounjaro?
GLP-1 medications can restore ovulation in women with PCOS while simultaneously reducing oral contraceptive absorption — a dual fertility impact.
Read the evidenceDoes it cause depression?
The largest FDA meta-analysis — 91 trials, 107,910 participants — found no increased risk. Emerging evidence suggests possible mood-stabilizing properties.
Read the evidenceDoes it cause gastroparesis?
GLP-1 medications slow gastric emptying by design — a dose-dependent, generally reversible effect that differs mechanistically from true gastroparesis.
Read the evidenceDoes it cause thyroid cancer?
Rodent studies showed tumors, but 15+ years of human data have not — a species-specific difference in thyroid receptor expression.
Read the evidenceCan it cause kidney stones?
GLP-1 RAs show renal protective effects in large trials. Stone risk appears tied to dehydration from GI side effects, not the drug itself.
Read the evidenceWill I have loose skin?
Determined by total weight lost, rate of loss, age, and genetics — a universal consequence of rapid weight loss, not drug-specific.
Read the evidenceCan I drink alcohol?
Many users report spontaneously reduced interest — now supported by evidence linking GLP-1 signaling to reward pathway modulation in the brain.
Read the evidenceDoes it interact with my medications?
Most interactions are not clinically significant — except for oral contraceptives, blood thinners, and levothyroxine.
Read the evidenceAm I at risk for vitamin deficiencies?
Over 22% develop measurable deficiencies by 12 months — vitamin D, iron, and B vitamins most affected — yet no monitoring guidelines exist.
Read the evidenceWhy is my GLP-1 so expensive?
A 442% surge in prescriptions collided with manufacturing constraints — creating shortages, a compounding market, and an evolving accessibility landscape.
Read the evidenceRelated topics
Section 6
Nutritional Science
What happens to your nutrition on a GLP-1 — vitamin D, B vitamins, iron, electrolytes, protein, calcium, fiber, and the monitoring gap. The evidence for proactive nutritional support.
Understand the scienceThe Knowledge Vault
Explore the Vault
Six deep-dive sections covering every dimension of GLP-1 therapy — grounded in evidence, written in plain language.
Back to Knowledge VaultThe vault goes deeper than clinical realities.
Five more sections cover approved medications, pipeline drugs, the scientists behind GLP-1 therapy, landmark cardiovascular trials, and the nutritional science that matters most.
Back to Knowledge Vault*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Always consult your healthcare provider before starting any supplement.