The hypothalamus in the brain regulates hunger and appetite and gets signals about when to stop eating, said de Souza
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They are burned there, or oxidized, to produce energy
When to speak to a doctor urgently Always contact your prescribing clinician or a dermatologist if you notice: Sudden, patchy bald spots Red, painful, scaly or itchy areas on the scalp Hair loss together with severe nausea, vomiting, abdominal pain or signs of dehydration Hair loss plus symptoms like chest pain, shortness of breath, or visual changes For persistent or distressing shedding, ask your clinician about: Blood tests for iron, ferritin, vitamin B12, vitamin D, thyroid function and other nutritional markers Screening for autoimmune or hormonal causes of hair loss Whether your retatrutide dose or speed of weight loss needs adjusting A referral to a dermatologist or trichologist for scalp-focused assessment For general, evidence-based information on hair loss, you can also review resources like MedlinePlus guidance on hair loss from the U.S
Manning MC, Chou DK, Murphy BM, Payne RW, Katayama DS
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