The average person consumes about 600~900 kilocalories in a meal, but meal replacement powder can control the calories at about 50 kilocalories, and the intake of calories is less than the required amount, so the weight will certainly be reduced.
Meal replacement powder itself is not harmful to health. If you're too busy to take care of yourself, it's ok to have a meal with meal replacement powder occasionally. But if you only eat meal replacement powder every day to lose weight, it is harmful to human health.
First of all, eating meal replacement powder for a long time will make you lack carbohydrate, fat and protein, leading to malnutrition. Secondly, eating meal replacement powder is actually a diet in disguise. You lose weight by eating only a few steamed buns every day. A disadvantage of dieting is that it will lead to a decline in basal metabolic rate. Once you return to a normal diet, your body will turn every bite of food into fat and store it, and your weight will rebound in minutes.
So, it's up to the landlord to measure it himself ~ I hope it will be adopted ~