Carbohydrate can be exactly what you need when energy is low. A small refined snack on its own may not satisfy you for long, particularly when appetite is stronger before a period.
Protein is one contributor to fullness, alongside fibre, portion size, fat, texture, sleep, stress and preference. Add rather than forbid: yoghurt with fruit, eggs on toast, tofu with noodles or chickpeas in a sweet-potato curry.
The aim is not to engineer a perfect appetite response. It is to make meals and snacks substantial enough for the day you are having.
What protein does for fullness
Protein generally supports fullness through digestion, gut hormones and the brain's response to food. In everyday life, sleep, stress, taste and portion size also matter.
Include a recognisable source at meals without letting very large portions crowd out vegetables, fibre and enjoyment. Eggs, beans, yoghurt, fish, chicken, tofu and other familiar foods can all work.
The carb and protein pairing
Carbohydrate provides useful energy, while protein and fibre often help the meal last. Try porridge with milk and seeds, oatcakes with cheese, rice with tofu and vegetables, or lentil soup with bread.
If a chocolate craving comes with physical hunger, eat something substantial and keep the chocolate if you still want it. Yoghurt, fruit and a few pieces of chocolate can meet both needs without a contest.
Choose the protein that fits your kitchen
Choose protein according to culture, cost, allergies and preference. Poultry, eggs, fish, tofu, tempeh, pulses, yoghurt and cottage cheese all bring different benefits.
Use the same ingredient twice when helpful: roast chicken for a grain bowl, tofu for noodles and wraps, or chickpeas for curry and salad.
Eggs: boil a few for toast, salads or an afternoon snack.
Tofu: marinate once, then use in stir-fry and wraps.
Chicken: cook extra alongside a tray bake for the next day's lunch.
Pulses: split a tin between soup, curry and a hummus-style snack.
Yoghurt: use with breakfast, fruit and savoury sauces.
Prepare for the hungry afternoon
Prepare the snack before hunger becomes urgent. Portion yoghurt, boil eggs, make hummus or place oatcakes beside a spread you enjoy.
Planning removes friction; it is not a test of discipline.
Pair carbohydrate and protein
Try fruit with yoghurt, oatcakes with cheese, toast with egg, or banana with peanut butter. Add chocolate because you enjoy it, not because the first snack was a punishment.
A note on supplements and symptoms
Most people do not need protein supplements, and food usually brings more variety for less money. Kidney disease and some other conditions require personalised protein advice.
Speak to a clinician if appetite changes are severe, eating feels out of control, periods are very heavy or dietary restriction is becoming stressful.