Weight gain is precisely the opposite of what someone who is looking to lose weight wants, so, for this reason, people seeking to reduce their weight or size should not use this product. Since mass gainers are really just very efficient macronutrient sources, the only side effects are related to the macronutrients they provide. An FCR (kg feed dry matter intake per kg live mass gain) for lambs is often in the range of about 4 to 5 on high-concentrate rations. For beef cattle, FCR calculated on live weight gain of 4.5–7.5 was in the normal range with an FCR above 6 being typical. It comes with a lot of other negative side effects as well, far more than most … Though weight loss is a goal for many people, others hope to gain weight, often to look and feel more muscular or to improve athletic performance. Mass Gainer Side Effects. Instead, you might consider one of Mutant’s fat loss supplements called Mutant Stim-U-Lant. Weight gainers are essentially high calorie food supplements with plentiful carbohydrates, protein, vitamins and other elements. A careful examination of the mass gain product ingredients should occur along with comparing the ingredients in any other supplements that you may be taking. There are a few side effects that can be associated with the use of mass gainers. The main potential side effect of mass gainers is digestive issues: bloating, gassiness, and other signs of an upset stomach. Some data for sheep illustrate variations in FCR. From faster muscle growth and repair to greater energy, Serious Mass results are quite impressive. Side effects of Mass Gainers. The cause for these digestive issues is dependent on the source of carbohydrates or the source of protein. It makes me drowsy as well. However, Serious Mass gainer side effects shouldn't be ignored. USN Hyperbolic Mass is a food supplement that falls under the category of weight gainer, or as it also known, mass gainer. Mutant Mass Side Effects. The main negative side effect I have firsthand experienced is that it can cause mood changes and make me more angry and aggressive than I would normally be. Side Effects. The first risk, alluded to earlier, is the metabolic effects of very high carbohydrate intake, especially when it’s high glycemic index carbs. … Find some of the best mass gainers like ON Serious Mass to support your weight goals. Try weight gain shakes & supplements from GNC. Some individuals may find mass gainers to be hard on their digestive system and may create bloating or indigestion. Many typically contain more than 1,000 calories per … Optimum Nutrition Serious Mass Weight Gainer Protein Powder, Vitamin C, Zinc and Vitamin D for Immune Support, Chocolate, 12 Pound (Packaging May Vary) 4.5 out of 5 stars 36,627 $46.39 $ 46 . 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