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Best Peptides for Post Pregnancy Weight Loss: Protocol Comparison
GLP-1 Agonists (Semaglutide, Tirzepatide) Appetite suppression via hypothalamic GLP-1 receptors + delayed gastric emptying 9–12 months (3+ months post-breastfeeding) Active lactation, prolactin >20 ng/mL, untreated thyroid dysfunction 12–20% body weight reduct
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- GLP-1 Agonists (Semaglutide, Tirzepatide)
- Appetite suppression via hypothalamic GLP-1 receptors + delayed gastric emptying
- 9–12 months (3+ months post-breastfeeding)
- Active lactation, prolactin >20 ng/mL, untreated thyroid dysfunction
- 12–20% body weight reduction over 52–72 weeks
- Most effective for appetite-driven weight retention but requires full hormonal stabilisation first
- Growth Hormone Secretagogues (CJC-1295/Ipamorelin)
- Pulsatile GH release → lipolysis + lean mass preservation
- 6–9 months (can start sooner than GLP-1 if not breastfeeding)
- Active lactation, uncontrolled diabetes
- Prevents metabolic slowdown; supports 5–8% additional fat loss vs diet alone
- Best for preserving muscle during caloric deficit. Doesn't cause weight loss directly
- Thymosin Peptides (Thymalin)
- Immune modulation + systemic inflammation reduction
- 3–6 months (safe earlier than metabolic peptides)
- Active autoimmune flare
- Indirect metabolic benefit via inflammation reduction
- Adjunct only. Addresses barriers to weight loss rather than causing it
- Tesofensine
- Dopamine/norepinephrine/serotonin reuptake inhibition
- Not recommended postpartum (insufficient safety data)
- Breastfeeding, postpartum depression, cardiovascular conditions
- 10–12% weight reduction in general trials
- Too little postpartum-specific data to recommend despite efficacy in other populations