Price: $46.95 – $43.94
(as of Jan 19, 2026 16:07:57 UTC – Details)


Animal M-Stak is a premium supplement designed to optimize muscle growth and weight gain for hard gainers—bodybuilders and elite athletes who struggle to gain weight; if you eat your calories and can’t keep the weight on, this product was designed for you. Trusted by professional athletes worldwide for over 40 years, this non-hormonal enhancer helps nutrient partitioning and promotes nitrogen retention in muscles, maximizing the benefits from your workouts and diet. Accomplish your peak training potential by supplementing for 21 days straight with Animal M-Stak, the choice of champions for maximizing performance. This muscle growth mass gainer supplement is delivered in our world famous, industry respected pill pack system. Simply grab one M-Stak pack out of the container and you can throw it in your pocket or gym bag.
Is Discontinued By Manufacturer ‏ : ‎ No
Product Dimensions ‏ : ‎ 3.99 x 3.99 x 5.6 inches; 0.04 ounces
Item model number ‏ : ‎ U3028
Department ‏ : ‎ unisex-adult
Date First Available ‏ : ‎ September 16, 2003
Manufacturer ‏ : ‎ Universal Nutrition
ASIN ‏ : ‎ B000GONZZC
Best Sellers Rank: #18,664 in Health & Household (See Top 100 in Health & Household) #15 in Sports Nutrition Weight Gainers #1,656 in Sales & Deals
Customer Reviews: 4.6 4.6 out of 5 stars (887) var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });
Maximize your Goals: Animal M-Stak combines nutrient partitioning and nitrogen retention in your muscles to help your body make the most of your workout to help muscle fullness and these weight gain pills ensure the food you eat goes to muscle and not fat
Ideal for Hard Gainers: This is perfect for bodybuilders or elite strength athletes that have trouble putting on weight. They are called “hard gainers” in the sport. If you eat your calories & can’t keep the weight on, this product was designed for you
Advanced Formula to Build Muscle: Featuring 6 different complexes that help your body make the most of the nutrients you are putting in, this is your solution to boost energy, reduce stress, prevent muscle breakdown, and induce anabolism for muscle growth
Reach Peak Potential in 21 Days: On training days, consume 30-45 minutes before your workout, and on non-training days, take between meals. It’s simple; by putting your body in a greater anabolic environment, notice fuller muscles and improved strength
Made to the Highest Quality & Safety Standards: All of our products are produced in our GMP certified US plant, and every batch is 3rd party lab tested for quality, safety and potency; our products work synergistically across our range