People taking weight-loss drugs such as Wegovy (semaglutide) and Mounjaro (tirzepatide) are being advised to eat more protein-rich, nutrient-dense and fibre-rich foods, while limiting spicy, sugary and fried items to reduce side effects like nausea, reflux, bloating and vomiting.
Ramona Saleh, Professional Standards Pharmacist at Pharmacy2U, said that while no foods are strictly forbidden on these treatments, which slow gastric emptying and reduce appetite, mindful dietary choices can help users meet their nutritional needs and manage common side effects.
In 2026, more than 6.3% of households in Great Britain now include at least one person who uses a GLP-1 medication.
Foods to eat more of
Saleh recommends that weight-loss treatment users consider incorporating protein-rich foods such as eggs. "As calorie intake often decreases during weight loss treatment, getting enough protein in your diet can help support the maintenance of muscle mass. Eggs are a convenient source of protein, with one large egg providing about 6 grams of protein for just 72 calories," she said. Other options include cottage cheese, Greek yoghurt, beans, fish, tofu, and lean meats like chicken and turkey.
Nutrient-dense fruit and vegetables are also advised. "When appetite is reduced, it can be more challenging to consume enough vitamins and minerals to support your body's needs. Including a variety of fruit and vegetables can help provide essential nutrients whilst adding relatively few calories," Saleh explained. Affordable options such as carrots, tomatoes, peppers, leafy greens, and apples are high in nutrients and may support hydration.
Fibre-rich foods like lentils can help with constipation, a common symptom of these treatments. "Foods with a natural mix of soluble and insoluble fibre can help support healthy digestion, alongside adequate fluid intake. Legumes such as lentils, black beans, and chickpeas also provide plant-based protein, making them a nutritious and budget-friendly choice," she said.
Foods to limit
While there is no need to eliminate specific foods completely unless advised by a healthcare professional, some people may find certain foods make side effects more noticeable. Saleh suggests limiting spicy foods like hot chilli peppers, which can aggravate heartburn and acid reflux; foods high in added sugar such as pastries, which provide fewer nutrients relative to their calorie content; and fried or greasy foods like fries, which may worsen nausea, bloating and acid reflux.
For those affected, Saleh recommends milder alternatives such as red bell peppers, prioritising more nutrient-dense foods most of the time, and choosing grilled, baked or air-fried options instead of deep-fried items commonly served in fast-food restaurants.
