While it seems like most want to lose body mass, some actually want weight gain. Individuals who were either born with a very fast metabolism or are just highly active in their everyday life can have some difficulty keeping the scale number up. For others, it's simply that they would prefer to have more muscle mass on their frame.

Whatever the case, there are some products out there that can help with weight gain. The first thing to keep in mind is calories. The best products to use for weight gain will be ones that provide you with calories. Your body cannot build new tissue without being in a surplus of calories so in order to accomplish you're goal, you're going to have to eat or drink these calories.

Products can range from shakes, bars, meal replacement products or powders that are added to food to increase the caloric content.

The next thing to keep in mind is overall nutrition. While you definitely could go binging on junk to put on the body mass you desire, chances are this body mass is not going to be 'nice looking' and furthermore, you could actually end up sacrificing good health if you aren't careful. Far too often those who are trying to accomplish this goal will replace all the fruits, vegetables and whole grains in their diet with higher calorie items like candy, pizza, fast foods, heavy pasta meals and so on. These are going to be much more nutrient devoid and while definitely will help the goal, won't give your body what it needs.

So look for a product that has both calories and nutrition. You want something that will provide vitamins and minerals along with the calories coming mostly from protein, complex carbohydrates and healthy fats. If you stick to that guideline, you'll have much greater success at achieving your goal in a productive manner.