Foods to limit while taking GLP-1 medication
A SengMed nutrition guide · Reviewed by our clinical team
GLP-1 medications slow how quickly your stomach empties, which is part of why they help you feel full. The trade-off is that certain foods can sit heavily and make side effects like nausea, bloating, or reflux more noticeable. Adjusting what — and how — you eat makes the experience much smoother.
This guide is general information, not medical advice or a personalised meal plan. Your SengMed doctor or dietitian can tailor recommendations to your health and goals.
Foods worth limiting
These don’t have to be banned, but going easy on them — especially in the first weeks and on dose-increase days — tends to help:
- Fried and very fatty foods — fat is slow to digest and can trigger nausea.
- Rich, creamy, or oily dishes — heavy curries, deep-fried snacks, lots of coconut milk.
- Very sugary foods and drinks — sweet desserts, bubble tea, sugary kopi/teh can cause a quick spike and worsen queasiness.
- Large portions — even healthy food can feel uncomfortable if the plate is too big. Appetite is lower now; let portion sizes follow.
- Carbonated drinks — soft drinks and sparkling water add gas and bloating.
- Alcohol — can irritate the stomach and add empty calories.
- Very spicy food — chilli can aggravate reflux and an already-sensitive stomach for some people.
- Ultra-processed snacks — high in fat, salt, and sugar with little fibre or protein.
What to eat instead
Build meals around foods that are gentle on the stomach and support steady weight loss:
- Lean protein — fish, skinless chicken, tofu, eggs, beans. Protein helps you stay full and protects muscle as you lose weight.
- Vegetables and fruit — aim to fill half your plate; cooked vegetables are often easier to tolerate than raw early on.
- Whole grains and fibre — brown rice, wholemeal options, oats — in modest portions.
- Water — sip throughout the day; mild dehydration can worsen nausea and constipation.
How you eat matters too
- Eat slowly and put your utensils down between bites.
- Smaller, more frequent meals can feel better than three large ones.
- Stop at comfortably full — not stuffed. Fullness arrives sooner now.
- Don’t lie down straight after eating, to reduce reflux.
Eating well at the hawker centre
You don’t have to avoid local food — just choose and portion wisely:
- Pick soup-based or steamed dishes (sliced fish soup, yong tau foo in clear soup) over deep-fried ones.
- Ask for less oil, less gravy, less rice — most stalls will oblige.
- Choose grilled or steamed proteins; go easy on fatty cuts and skin.
- Swap sugary drinks for water or kopi/teh kosong (no sugar).
- Share a dish or take half away rather than finishing an oversized portion.
When to talk to your care team
Some nausea or changes in appetite are expected early on. Message your SengMed care team if side effects are severe, stop you from keeping fluids down, or don’t settle as your body adjusts. For severe abdominal pain or signs of dehydration, seek medical care promptly.