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In the tissues, CO 2 enters the erythrocyte by diffusion, where it is hydrated with the help of carbonic anhydrase
Updated July 24, 2026 at 2:32 PM PDT For the latest stories on the science of healthy living, subscribe to NPR's Health newsletter
Weight Loss DIFFERENCE BETWEEN SEMAGLUTIDE AND TIRZEPATIDE The main difference between semaglutide and tirzepatide is their mechanism: semaglutide activates only GLP-1 receptors, while tirzepatide activates both GLP-1 and GIP receptors, producing slightly more weight loss on average (20-25% vs 15-20% of body weight)
This is often mistaken for a broader muscle ache if the injection occurs in the thigh or abdomen
Which Is Easier to Use: Contrave or Semaglutide
Potential reasons for this include: (1) 79% of our patients used a GLP-1 RA for an indication of diabetes rather than weight management, and (2) interactions with breast cancer treatments such as chemotherapy, chemotherapy supportive medications such as steroids, and/or endocrine therapy, which exacerbate metabolic dysfunction and contribute to weight gain, may attenuate weight loss with a GLP-1 RA
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