According to MedicineNet, mass gainers are high-calorie supplements intended to promote muscle gain and weight increase. Typically supplied in powder form, they are calorie-dense, containing varying amounts of proteins, fats, and carbohydrates. Although the protein content is usually moderate, these products often contain types like whey, casein, or plant-based proteins such as soy and pea protein. Additionally, mass gainers may include creatine, which supports muscle strength and growth when combined with resistance training, as well as vitamins, minerals, and electrolytes to maintain hydration and nutrient balance.
These supplements support muscle growth by increasing calorie and protein intake, which enhances muscle protein synthesis, particularly when combined with strength training. Carbohydrates provide the energy required for exercise and help replenish glycogen stores, essential for recovery post-workout. Many mass gainers have a 3:1 carbohydrate-to-protein ratio, considered ideal for post-workout recovery, explains MedicineNet.
Common Side Effects of Mass Gainers
Despite their benefits, mass gainers can produce various side effects, especially when overused or consumed without proper understanding of the ingredients.
1. Digestive Discomfort
One of the most frequently reported side effects of mass gainers is digestive discomfort. This can include bloating, gas, and even diarrhoea. According to Mr. Supplement, many mass gainers contain high levels of lactose, which can be problematic for individuals with lactose intolerance. The high calorie and nutrient density of mass gainers may overwhelm the digestive system, causing stomach discomfort.
2. Unwanted Fat Gain
Although mass gainers are formulated to help increase muscle mass, excess calorie intake can lead to fat accumulation if not used properly. As Mr. Supplement explains, if your caloric intake surpasses what your body requires, the excess calories are likely to be stored as fat rather than muscle. Therefore, to achieve the desired muscle gain without excessive fat, it’s essential to pair mass gainers with a balanced diet and a structured workout routine.
3. Blood Sugar Spikes
Mass gainers are often high in sugar, which helps improve taste and increase calorie content but can lead to significant blood sugar fluctuations. This is particularly concerning for those with insulin sensitivity or diabetes, as sudden blood sugar spikes can lead to increased insulin production and potential health complications. Mr. Supplement cautions that individuals with prediabetes or diabetes should use mass gainers with caution and consider their impact on blood sugar levels. Dr. Eric Berg also state that the spikes in your blood sugar often lead to a crash right after.
4. Kidney Strain
Excess protein intake, common with regular mass gainer use, can put additional strain on the kidneys. For those with pre-existing kidney issues, the increased workload of filtering protein by-products could potentially cause kidney damage over time. Proper hydration and moderation in protein intake are vital for reducing this risk, especially since most people can only absorb around 30 grams of protein per meal.
5. Allergic Reactions
Mass gainers frequently contain ingredients such as dairy, soy, and gluten, which are common allergens. For individuals with allergies or intolerances, these ingredients can cause adverse reactions, ranging from mild digestive distress to severe allergic symptoms like hives or swelling, highlights Mr. Supplement. It’s crucial to check ingredient labels and choose a mass gainer that aligns with your dietary needs to avoid these potential side effects.
6. Nutrient Imbalance
Relying too heavily on mass gainers can lead to nutrient imbalances since these supplements lack the diversity of nutrients found in whole foods. Over-reliance may result in deficiencies in essential vitamins and minerals, potentially affecting overall health and performance. A balanced diet that includes a variety of whole foods is necessary to maintain nutritional balance alongside using mass gainers.
7. Hormonal Imbalance
High-calorie and high-protein intake associated with mass gainer use can impact hormonal balance. According to Dr Eric Berg, who specialises in ketosis and intermittent fasting, certain mass gainers contain ingredients like maltodextrin, which not only spikes blood sugar but can also disrupt hormone levels. This hormonal imbalance may contribute to insulin resistance, fatigue, and even mood disturbances, explains Dr. Eric Berg.
8. Risk of Addiction to Maltodextrin
Dr. Eric Berg raises concerns about maltodextrin, a common ingredient in mass gainers. Maltodextrin is used to enhance muscle growth but is highly addictive because it raises dopamine levels, making it similar to sugar in its effect on the brain’s reward centres. This addictive quality can lead to increased cravings and frequent consumption, potentially resulting in adverse health effects such as fatty liver, high cholesterol, and dental issues due to increased acid production in the mouth.
How to Safely Use Mass Gainers
To minimise the side effects of mass gainers, consider the following recommendations:
- Check Ingredients: Look out for additives like maltodextrin and high sugar content, which can lead to health issues. Opt for products with natural ingredients and minimal additives.
- Monitor Protein Intake: Avoid consuming excessive protein, which can strain the kidneys. Sticking to around 30 grams of protein per meal may help prevent potential issues.
- Stay Hydrated: Adequate water intake supports kidney function and helps process the by-products of protein metabolism.
- Use in Conjunction with a Balanced Diet: While mass gainers can supplement your calorie intake, whole foods are essential for providing a balanced range of nutrients.
- Consult a Healthcare Professional: Especially if you have pre-existing health conditions such as kidney disease, diabetes, or food allergies, it’s important to consult with a healthcare provider before incorporating mass gainers into your diet.
Conclusion
Mass gainers can be an effective supplement for individuals aiming to gain weight and build muscle, but they come with potential side effects that should not be overlooked. From digestive discomfort and unwanted fat gain to more severe issues like kidney strain and hormonal imbalances, understanding these risks is essential for safe usage. By choosing quality products, monitoring intake, and consulting with a healthcare provider, you can make an informed decision on whether mass gainers are a suitable addition to your fitness journey.