After losing weight, Minh still had a double chin, which doctors treated with ultrasound waves to break down fat tissue.

I often stay awake until 1-2 am for work and need to eat at night for energy. What should I eat and how should I eat to avoid gaining weight? (Anh Vy, Ho Chi Minh City)

Eating too little or too much protein, focusing solely on animal protein, or improper distribution can impede weight loss efforts.

Anh Viet, 31, weighing nearly 120 kg, frequently experienced shortness of breath, heart palpitations, and swollen legs; doctors diagnosed him with mitral valve regurgitation and hypertension.

Eating less but still struggling to lose weight can be due to hidden calorie intake, insufficient protein, low physical activity, or inadequate sleep, which can disrupt hormones controlling hunger and satiety.

Refined carbohydrates are low in fiber and protein, easily raise blood sugar, cause rapid hunger, and increase the risk of fat accumulation.