The Medical Advisor

GLP-1 & Obesity Medicine Guide • Updated October 7, 2026 Semaglutide and tirzepatide can produce substantial weight loss, but an important question follows: How much of the weight lost is fat, and how much is lean mass? The question is more complicated than it first appears. Studies of semaglutide and tirzepatide show that both treatments reduce fat mass and can also reduce lean mass during weight loss. But lean mass is not synonymous with skeletal muscle , and results from separate trials cannot be treated as a direct head-to-head comparison of muscle preservation. A 2026 systematic review and meta-analysis of 20 randomized controlled trials involving 15,782 participants estimated that lean mass represented approximately 35.2% of weight lost with semaglutide and 25.4% with tirzepatide . The analysis also found a more favorable proportion with lifestyle intervention that incorporated r...

Medically Reviewed by: Dr Frank Yap, MD | Written by: OneDayMD Editorial Team | Last Updated: September 2026 Quick Answer Berberine, psyllium husk, and curcumin have the best human clinical evidence among natural Ozempic alternatives, though their weight-loss effect is modest (roughly 1–4 kg over 2–6 months) compared with semaglutide's 15%+ body-weight reduction. Berberine works through glucose and lipid metabolism, not by activating GLP-1 receptors the way Ozempic does — so "nature's Ozempic" is a catchy label, not a mechanistic match. As of September 2026, prescription GLP-1 drugs have also gotten dramatically cheaper (Wegovy from $349/month, Zepbound from $299/month via manufacturer cash-pay programs) and now come in oral pill form, which changes the cost-based case for natural alternatives even as safety and sustainability concerns remain valid reasons to consider them. There are natural alternatives to Ozempic like berberine, curcumin, and psyllium husk. ...