Older medicines like Alli, with the generic name orlistat, can cause oily stools
The result is megaloblastic anemia as for vitamin B12 deficiency
The current market for GLP-1s approved by the FDA for weight management includes Saxenda, Wegovy, Ozempic, Zepbound and Monjaro

Its satiety effect is mediated by receptors expressed in the area postrema, which relay signals to other structures involved in appetite regulation, such as the nucleus of the solitary tract, the lateral parabrachial nucleus, the ventral tegmental area, and the arcuate nucleus in the hypothalamus.57 Some of amylins actions are mediated through interaction with calcitonin gene-related peptide (CGRP) receptors, which is why it is considered a dual amylincalcitonin receptor agonist (DACRA).57 Cagrilintide is a long-acting DACRA that has been evaluated both as monotherapy and in combination with semaglutide (CagriSema) for body weight management in individuals with overweight or obesity, achieving a weight reduction of 17.1% over 20 weeks with the maximum weekly doses of both peptides (2.4 mg each).58 It has also proven effective in individuals with obesity and type 2 diabetes, although the weight reduction observed in this group was lower

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