If you are looking at buying a weight gain protein powder it can come in many different varieties.
Some of the differences between brands and types can include size, calorie amount, ingredients, protein/carbohydrate/fat ratio and also flavours too.
From looking at a lot of the weight gain protein powders nutritional panels you will find that the protein level in most of them is pretty much the same and the difference in the ingredients comes from the carbohydrates, fats and if there is any other ingredients added.
The protein per serve generally will cover what your body may need to recover and grow after training and through the day and the rest of the ingredients take care of the weight gain and getting your calories up for the day.
If you want to break it down simply and compare, a weight gain protein powder is the same as having a steak, chicken or fish meal with pasta or potatoes or a high powered protein enriched chocolate milk drink.
To put on weight for whatever reason you have to plan your meals through the day, by using a weight gain protein you get a good supply of nutrients easily into your diet, easy to prepare and easy to drink.
The weight gain protein drinks usually taste great too due to the high carbohydrate levels and fat content in some of them.
What your plan is and your goal will determine which weight gain protein powder you will use.