If you're really trying to gain weight quickly, you'll need a constant supply of quality calories throughout the day.  Eating 6 or more high calorie solid meals can be very difficulty, and this is where a weight gain powder fills the void.

The goal of a weight gain powder is to provide you with plenty of calories, in a quick and convenient fashion.  Unlike whey protein powder that is extremely low in carbohydrates and fats, weight gainer powders provide lots protein, carbohydrates and fats-everything you need for a complete high calorie meal.  Typically one serving of a weight gainer shake will be around 500 or more calories.  High quality weight gainer's contain quality protein, complex carbohydrates (without too much sugar), and healthy fats.

My top pick is another one of Optimum Nutrition's products called Pro Complex Gainer.  The product tastes decent, mixes well, and contains all of the macronutrients that you will need to gain weight.  As with most of Optimum Nutrition's products, they are not the cheapest, but are priced extremely well for the quality ingrediets that they use.

Below are some of the highlights of Optimum's Pro Complex Gainer:

• Over 650 calories per serving
• Low in sugar
• 7 different types of protein (whey, casein, egg etc.)
• High protein to carbohydrate ratio
• Mixes easily
• Not chalky or gritty, even when spoon stirred or shaken

More Info About Pro Complex Gainer

"Don't judge a gainer based solely upon its calories per serving. Because when it comes to gaining lean mass, not all calories are created equally. Unlike typical weight-gain formulas that are loaded with simple sugars and fat. Pro Complex Gainer derives a much higher percentage of its calories from protein-7 premium protein sources to be exact. By also supplying complex carbohydrates, dietary fiber, medium chain triglycerides (MCTs), digestive enzymes, vitamins, essential minerals, and great taste as well, we've created the ideal lean gainer. Pro Complex Gainer was made with quality, not quantity, in mind. Because we understand that you want to get big, not fat."

Real Pro Complex Gainer User Reviews

Pro Complex Gainer Nutritional Information

Pro Complex Gainer Directions: Spoon Stirred: Just add one heaping scoop of Pro Complex�� Gainer to a glass filled with 16 oz of water, nonfat milk or your favorite beverage. Then mix it up with a spoon. Stir for about 20 seconds or until powder is completely dissolved. Shaker: Just add one heaping scoop of Pro Complex� Gainer to your shaker cup and then pour in 16 oz of your preferred beverage. Cover and shake for 20-30 seconds. Tip: Mixing one scoop with 6-8 fl oz of nonfat milk instead of water will give you a thicker, creamier shake. Blender: Add one heaping scoop of Pro Complex� Gainer to a blender filled with 16 oz of water, nonfat milk, or your favorite beverage. Blend for 30-40 seconds. Then add a few ice cubes and blend for an additional 30 seconds. Pro Complex� Gainer is a superior formula that can be used to support high-calorie needs in a variety of ways. Between Meals: Drink 1-2 servings of Pro Complex� Gainer between meals to maintain positive nitrogen balance and support a high-calorie diet. Post-Workout: Begin drinking one serving of Pro Complex� Gainer 30-60 minutes following exercise to support maximum recovery. Before Bed: Drink one serving of Pro Complex� Gainer about 45-60 minutes before bed to provide nutrients to recovering muscle throughout the night.