Diet shakes

It seems like that there is a trend of losing weight.
A couple of years ago, Billy's boot camp and core rhythm became very popular.
This year, it seems like, diet shakes are catching a trend.
DHC and ORBIS, and some of the big online companies are advertising diet shakes.
Diet shakes can reduce calories you take if you replace a meal to a diet shake.
Diet shakes have only about 150 kcal each, so if you replace a food and drink a diet shake,
you can cut huge amount od calories a day.
There are disadvantages of diet shake, though.
I tried some of the diet shakes before, but they are sweet and don't feel like eating food.
So I felt hungry and eventually ate some food.
Also, diet shakes are little expensive. It costs about 300 yen each.