Staring at a blender full of protein powder that tastes like chalk and clumps no matter how much you shake it is a common frustration when trying to increase calories. Many weight gainers pack in sugar and artificial ingredients to hit a calorie number, leaving you with a product that is hard to stomach daily.
Effective bulking supplements should bridge the gap between your diet and your goals with clean calories and quality protein, not just filler. I compared formulas based on their protein sources, carbohydrate quality, and how well they fit into a daily routine without digestive discomfort.
My overall pick for best supplements for bulking is the NOW Foods Supplements, Psyllium Husk Caps 500 mg. It provides a concentrated, convenient source of soluble fiber to help maintain regularity, which is a common challenge during high-calorie intake phases. My top picks are just below.
Our Top Picks
| Product | NC Score | ||
|---|---|---|---|
| Best Overall NOW Foods Psyllium Husk Caps 500mg with Non-GMO | 9.9 | Check Price on Amazon | |
| Best for foundational micronutrients Optimum Nutrition Serious Mass Weight Gainer | 9.7 | Check Price on Amazon | |
| Best for bulk value NOW Whole Psyllium Husks Powder with 6g Soluble | 9.6 | Check Price on Amazon | |
| Best for NSF certification NAKED Chocolate Mass Gainer with NSF-Certified | 9.6 | Check Price on Amazon | |
| Best for vanilla flavor Optimum Nutrition Serious Mass Weight Gainer | 9.5 | Check Price on Amazon | |
Full Reviews
This is NOW Foods' psyllium husk in a 500mg capsule format, providing natural soluble fiber. It is Non-GMO Project Verified, Kosher, and vegan.
Pros
- +Non-GMO Project Verified and Kosher certifications
- +Vegan capsule shell with no animal gelatin
- +Manufactured under NPA A-rated GMP standards
- +Allergen-friendly formula free from major triggers
Cons
- −Requires multiple capsules to reach common fiber intake
- −Bulking action demands significant water consumption
- −Capsule format may be less convenient than powder
Detailed Review
This supplement delivers 500mg of psyllium husk per capsule, a concentrated form of natural soluble fiber. The product carries multiple meaningful certifications, including Non-GMO Project Verified and is manufactured under NPA A-rated GMP standards, which I consider a mark of quality control.
The vegan capsule format and allergen-friendly profile make it a straightforward choice for specific dietary routines. However, the serving size isn't specified on the label, which means you'll need to determine your own intake relative to common fiber recommendations.
I'd rate this a reasonable pick for someone seeking a certified, capsule-based fiber supplement from a long-established brand, but be prepared to take several capsules with plenty of water.
Strain Count & Delivery
This product uses psyllium husk powder encapsulated at 500mg per capsule. This format is fundamentally different from loose powder or drink mixes. Taking capsules requires no mixing or measuring, but it also means you cannot easily adjust the dose incrementally.
For a routine, you would take these capsules with a full glass of water, and it's crucial to follow with more fluids throughout the day due to psyllium's significant bulking action. I see this working best for someone who prioritizes convenience and dislikes the texture of mixed fiber powders, as long as they are comfortable swallowing multiple capsules to meet their fiber goals.
Since increasing fiber intake can affect digestion, it's wise to consult a healthcare provider if you have any underlying gastrointestinal concerns.
This is a high-calorie weight gainer powder delivering over 1,250 calories per two-scoop serving. It provides 50 grams of blended protein and over 250 grams of carbohydrates.
Pros
- +Substantial calorie load for significant weight gain goals
- +Complete macronutrient profile with high protein and carbs
- +Added micronutrient blend for foundational nutrition
- +Flexible powder format for customizing calorie intake
Cons
- −Large serving size requiring two scoops per use
- −High carbohydrate content not ideal for low-carb diets
- −Powder format demands preparation and blending
Key Facts
Detailed Review
Optimum Nutrition's Serious Mass is built around a two-scoop serving delivering over 1,250 calories, a defining feature for anyone struggling to consume enough calories through food alone. I see this working best for individuals in a dedicated bulking phase who need a significant, convenient calorie surplus.
The formula provides 50 grams of blended protein and over 250 grams of carbohydrates, aiming to support both muscle repair and energy replenishment. The inclusion of 20+ vitamins and minerals adds a layer of foundational nutrition often missing in pure calorie sources.
The main trade-off is the sheer volume per serving, which some may find challenging to consume regularly. I'd consider this a reasonable pick for its specific, high-calorie purpose, but not for general protein supplementation or low-carb routines.
NOW Whole Psyllium Husks is a powdered fiber supplement providing 6 grams of soluble fiber per tablespoon serving. It carries the brand's NPA A-rated GMP quality certification.
Pros
- +Clear 6-gram fiber dose per measured serving
- +GMP certification for manufacturing transparency
- +Unflavored powder for mixing versatility
- +Bulk sizing reduces per-serving cost over time
Cons
- −Immediate consumption required after mixing
- −Large 12-ounce liquid minimum per serving
- −No flavoring options to mask texture
Key Facts
Detailed Review
This NOW Whole Psyllium Husks powder delivers a straightforward 6-gram dose of soluble fiber per tablespoon, which the label notes supplies most of the daily amount suggested for certain health support. The product is an unflavored powder that requires vigorous mixing into at least 12 ounces of liquid and immediate drinking, a specific routine constraint.
I see this working best for someone comfortable with a plain, bulk-powder format who prioritizes a clear fiber dose and manufacturing quality, indicated by the NPA A-rated GMP certification. The main trade-off is the need for precise, quick preparation to avoid the mixture thickening.
This mass gainer powder combines whey and casein protein with organic tapioca maltodextrin for 1,360 calories per serving. It carries an NSF certification for product purity and safety verification.
Pros
- +NSF certification for third-party purity verification
- +Organic tapioca maltodextrin instead of wheat-based sources
- +Multi-phase protein blend with whey and casein
- +Only five total ingredients for straightforward formulation
Cons
- −Extremely large 1,360 calorie serving requires significant consumption
- −Massive 8-pound container demands substantial storage space
- −Organic coconut sugar adds 5g sugar per serving
Key Facts
Detailed Review
NAKED Mass stands out with its NSF certification and straightforward five-ingredient formula. This weight gainer delivers a substantial 1,360 calories per serving through a blend of whey, casein, organic tapioca maltodextrin, coconut sugar, and raw cacao.
The multi-phase protein combination provides both fast-digesting whey and slower-digesting casein, which may support muscle protein synthesis over several hours. I see this working best for individuals with very high caloric needs who prioritize clean ingredient sourcing.
The trade-off is the sheer volume required per serving, which makes this unsuitable for casual supplementation. Its organic tapioca maltodextrin offers a gluten-free carbohydrate alternative to common wheat-based options.
Optimum Nutrition Serious Mass is a high-calorie weight gainer delivering over 1,200 calories and 50 grams of protein per serving. Its formula includes over 250 grams of carbohydrates and 20-plus essential vitamins and minerals.
Pros
- +Extremely high calorie count per serving
- +Combined protein and carbohydrate formula
- +Added essential vitamin and mineral blend
- +Vanilla flavor for easy mixing and customization
Cons
- −Massive two-scoop serving size may be inconvenient
- −High carbohydrate load may not suit all diet plans
- −Requires blending with other ingredients for best taste
Key Facts
Detailed Review
Optimum Nutrition Serious Mass is built around a two-scoop serving delivering over 1,200 calories, a massive intake designed for intense bulking. The formula provides 50 grams of blended protein alongside over 250 grams of carbohydrates, aiming to support both muscle recovery and energy replenishment.
The inclusion of more than 20 essential vitamins and minerals adds a layer of nutritional completeness, which I see as a practical hedge against potential micronutrient gaps during high-calorie phases. This product is explicitly framed as a shake builder, with the suggestion to blend it with milk or calorie-dense foods.
I'd consider this a specialized tool for those struggling to meet extreme caloric needs through food alone. The trade-off is the sheer volume per serving, which requires a significant commitment to consuming and blending.
Buying Guide for Bulking Supplements
A supplement for bulking needs to deliver usable nutrition without unnecessary additives. The right choice depends less on the highest calorie count and more on the quality of those calories and how your body handles them. Here is what separates a supportive formula from a sugary one.
Protein source and blend
The type of protein determines how well it supports muscle repair throughout the day. Blends containing both whey and casein, like those found in some mass gainers, provide a fast-absorbing source post-workout and a slower-releasing one to maintain amino acid levels.
A product listing just “protein blend” without specifying sources makes it difficult to gauge its effectiveness. For those managing dietary restrictions, checking for certifications like gluten-free or soy-free becomes important, as many formulas use common allergens as protein bases.
Carbohydrate quality and calorie density
Carbohydrates fuel workouts and help replenish glycogen, but their source matters. Some gainers use simple sugars and wheat-based maltodextrin to quickly spike calories, which can lead to energy crashes and bloating.
Look for products that derive calories from complex carbohydrates like organic tapioca maltodextrin or oat flour. These provide more sustained energy and are often easier to digest, making the high-calorie serving easier to incorporate into your daily shake or meal.
Third-party testing and ingredient transparency
When a product carries thousands of calories per serving, you want confidence in what those calories are made of. Third-party certifications, such as NSF Certified for Sport or Informed-Sport, verify that the label matches the contents and that the product is free from banned substances.
This is especially relevant for athletes subject to testing. A short, clear ingredient list without artificial sweeteners or colors often indicates a brand prioritizing transparency, which aligns with choosing clean supplements for long-term use.
Fiber and digestive support
Dramatically increasing food and supplement intake can disrupt digestive regularity. A formula that includes soluble fiber, like psyllium husk, can help maintain gut function during dietary changes.
Some mass gainers neglect this, focusing solely on macronutrients. Others incorporate digestive enzymes to aid breakdown. Considering your individual tolerance is key, and starting with a smaller serving to assess digestion is a practical step. For more on foundational nutrition, our guide to multivitamins covers daily micronutrient support.
Once you assess the protein quality, carbohydrate source, and any third-party verification, the right product becomes clearer. It is then a matter of matching the serving size and flavor to a routine you can maintain consistently.
Why You Should Trust Us
This comparison is based on a research-driven methodology focused on supplement labels, ingredient forms, and disclosed certifications. We assign an NC Score by analyzing each product’s formula for dose accuracy, ingredient quality, and transparency, cross-referencing with third-party test results where available.
We do not use or test these products personally. Our aim is to provide clear, evidence-minded information to help you make an informed choice. This content is for informational purposes and is not intended as medical advice; consult a healthcare provider before starting any new supplement regimen.
Final Thoughts
Choosing a bulking supplement comes down to finding a balance between calorie density and ingredient quality you can tolerate daily. The best option delivers protein and energy in a form that supports your routine without digestive setbacks.
For a comprehensive choice, the NOW Foods Supplements, Psyllium Husk Caps 500 mg offers a concentrated, convenient source of soluble fiber to complement a high-calorie diet. If your priority is a straightforward, cost-effective fiber source, the NOW Supplements, Whole Psyllium Husks provides the same benefits in a versatile powder format.
For those whose primary goal is adding significant calories and protein from clean sources, a product like the NAKED Chocolate Mass Gainer, with its short ingredient list and NSF certification, is worth considering. The right supplement removes the guesswork from meeting increased nutritional demands, letting you focus on your training and diet. Exploring options in protein and fitness categories can provide further context for your goals.
FAQs
Do you need a mass gainer if you eat a lot of food?
Mass gainers are designed for individuals who struggle to consume enough calories through whole food alone due to appetite, time, or digestive capacity. They provide a concentrated source of calories and protein in a convenient format. If you are already meeting your caloric targets with food, a gainer may be unnecessary.
Can bulking supplements cause bloating?
High-calorie shakes, especially those with certain types of carbohydrates or sugar alcohols, can cause bloating and digestive discomfort. Starting with a half-serving to assess tolerance and choosing products with cleaner carbohydrate sources like organic tapioca can help minimize this. Consult a doctor if digestive issues persist.
Is it better to take a bulking supplement before or after a workout?
Timing depends on the supplement’s composition and your daily calorie distribution. A formula high in carbohydrates and calories is often used post-workout to replenish glycogen and support recovery. For general calorie supplementation, it can be split across the day, such as between meals or as a late-night shake.
What should you look for in a vegan bulking supplement?
Vegan formulas should use plant-based protein isolates like pea, rice, or hemp, and avoid animal-derived ingredients like whey or casein. Check for vegan certifications on the label. The carbohydrate source should also be plant-based, and the product should be free from common allergens if needed.