Learn how they work, what results to expect, and how to use them safely and effectively.
GLP-1 stands for glucagon-like peptide-1, a hormone released in response to food intake.
GLP-1 medications mimic this hormone and:
Reduce appetite
Increase fullness
Slow gastric emptying
Improve insulin sensitivity
Lower blood sugar
Semaglutide and tirzepatide are the most commonly prescribed GLP-1 based medications for weight loss. Tirzepatide also activates the GIP receptor, which may enhance fat loss and metabolic effects.
Clinical trials show average weight loss of:
About 15 percent of body weight with semaglutide
About 21 percent of body weight with tirzepatide
Individual results vary. Weight loss is greatest when medication is combined with adequate protein intake, resistance training, and lifestyle change.
Excess body fat is strongly associated with cardiovascular disease, type 2 diabetes, sleep apnea, joint degeneration, among a host of other health complications. Reducing excess adiposity improves insulin resistance, inflammatory markers, lipid profiles, mobility, and overall energy. For many adults, meaningful fat loss can significantly improve both health span and quality of life.
Most side effects are gastrointestinal and dose dependent. These include nausea, constipation, diarrhea, early fullness and reflux. Gradual dose escalation typically reduces these effects. Rare but serious risks may include pancreatitis, gallbladder disease, and severe dehydration. These medications require medical supervision.
One important consideration is lean mass loss. Studies suggest that up to 30 to 40 percent of weight lost on semaglutide may come from lean tissue if patients do not prioritize protein intake and resistance training. Preserving muscle is critical for metabolic rate, strength, and long-term health. GLP-1 medications should be paired with structured lifestyle strategies, including
Obesity is a chronic condition. Many patients regain weight after stopping medication. Some may taper successfully with sustained lifestyle change, while others benefit from ongoing treatment. This decision should be individualized based on risk factors and long-term goals. At Ludlow Longevity, we focus on the development of diet, exercise, and lifestyle habits that allow patients to taper off weight loss medications and maintain a health weight and optimal body composition.
GLP-1 medications such as semaglutide and tirzepatide are among the most effective weight loss therapies available today. When used thoughtfully and combined with strength training and adequate protein intake, they can dramatically improve metabolic health and quality of life. If you are considering GLP-1 weight loss therapy, speak with a qualified physician to determine whether it is appropriate for you. If you are an adult in California, please book an appointment with Dr. Ludlow to discuss weight loss therapies, which may include GLP-1 treatment.