Weight gainers are a broad group of high-calorie supplements that are marketed to those who have trouble gaining weight.
Similar to protein supplements, there is nothing magical about these supplements. They simply are a convenient way for some people to get more calories.
Typically, weight gainers are shakes very high in carbohydrates and high in protein.
For example, one popular supplement contains 1,250 calories, 252 grams of carbohydrates, and 50 grams of protein per serving.
While adding weight gainers to your diet can certainly increase the number of calories you are eating, some people find the taste and consistency of these products unpleasant.
Though these supplements can be convenient when you’re on the go, another option is simply to eat more real food, which would also provide other beneficial nutrients.