Low-carb insomnia: what to know

A sudden dietary change can alter meal timing, hunger, fluid balance, and how your body uses stored energy. Hunger at night, headache, cramps, or feeling alert and restless may disturb sleep. Caffeine, stress, anxiety, depression, burnout, jet lag, pain, medicines, and an irregular sleep schedule can also cause insomnia, so the diet may be coincidental rather than the only explanation.

Keep a simple diary of meals, symptoms, caffeine, exercise, and sleep. Avoid making a major restriction more severe while symptoms are unsettled; discuss a balanced plan with a clinician or dietitian, especially if you have diabetes or take glucose-lowering medicine. Keep regular wake times, dim lights before bed, and choose a satisfying evening meal that fits your health plan.

Arrange medical advice when sleep difficulty persists, affects daytime function, or comes with marked daytime sleepiness, low mood, panic, or difficulty concentrating. Seek urgent help for thoughts of self-harm, severe confusion, fainting, or symptoms of dangerously low blood sugar. Do not stop prescribed treatment without guidance.

Ask whether your diet change, medicines, caffeine, mood, or another sleep disorder could explain the pattern, and how to adjust food intake without compromising nutrition.