10 Best Weight Gain Supplements 2025 in the United States

Vanilla Naked Mass is a weight-gain supplement that stands out due to its simplicity and high nutritional value. With only three ingredients—Naked Whey, Naked Casein, and organic tapioca maltodextrin—it offers a clean, all-natural option for those looking to bulk up. Each serving delivers a substantial 1,250 calories, making it ideal for individuals who need to significantly boost their caloric intake. The 50 grams of protein and 252 grams of carbohydrates per serving provide a balanced macronutrient profile essential for muscle growth and recovery.

The inclusion of 11.5 grams of BCAAs supports muscle synthesis and repair. The product is free from GMOs, gluten, soy, and artificial additives, appealing to health-conscious users with dietary restrictions. The combination of fast-digesting whey and slow-digesting casein proteins ensures prolonged protein absorption, beneficial for sustained muscle building. With only 5 grams of sugar per serving, it may not be the best option for those seeking a sweeter taste. While the vanilla flavor is generally pleasant, some users may find it bland compared to more commercially flavored options.

Mixability is decent but may require a good shaker or blender to achieve a smooth consistency. The versatile powder can be added to various recipes, enhancing its usability beyond just shakes. If your goal is to gain weight with a natural, high-calorie supplement, Vanilla Naked Mass is a strong contender, especially if you have specific dietary needs or prefer minimal ingredient products.

Optimum Nutrition Serious Mass Weight Gainer Protein Powder is designed for those looking to increase their caloric intake and build muscle mass. Featuring 1,250 calories per 2-scoop serving, it provides a substantial caloric boost. Each serving also packs an impressive 50 grams of protein and over 250 grams of carbohydrates, ideal for muscle recovery and energy replenishment. Additionally, the product includes 25 vitamins and minerals, plus creatine and glutamine, to support overall health and muscle function.

The high calorie and carbohydrate content might not be suitable for those with dietary restrictions or who are not engaged in intense physical activity. The vanilla flavor is generally well-received, and the powder's mixability is enhanced by using an electric blender, allowing for customization with fruits and nuts. A potential drawback is that packaging can vary, and exposure to heat can damage the product, requiring careful handling.

This supplement is a strong option for athletes and bodybuilders needing a high-calorie, high-protein supplement to aid weight gain and muscle development.

Optimum Nutrition Serious Mass is a weight-gain supplement designed to help individuals increase their calorie intake and gain weight. It offers a high caloric content with over 1,200 calories per 2-scoop serving, which is excellent for those looking to add mass. The product also provides 50 grams of protein per serving, which supports muscle growth and recovery. Additionally, it includes over 250 grams of carbohydrates, which are essential for energy and replenishing glycogen stores post-workout.

The inclusion of 22 vitamins and minerals, such as Vitamin C, Vitamin D, and Zinc, helps support health and immune function. The product is caffeine-free, making it suitable for those who are sensitive to stimulants. Mixing Serious Mass with an electric blender allows for versatility, as you can add fruits, peanut butter, and other calorie-dense foods to boost your intake further.

However, there are only 8 servings per container, which may require frequent purchases for regular use. The vanilla flavor is generally well-received, but some users may find it too sweet or artificial. Additionally, the high carbohydrate content may not be suitable for those with dietary restrictions or certain health conditions. Despite these drawbacks, Serious Mass is a solid option for individuals seeking a comprehensive weight-gain supplement, especially those who struggle to meet their caloric needs through regular meals.