Chocolate Glaze Donut
Mass Gainer
Best Seller

Mass Gainer

Nutrient-dense mass gainer with 750 calories, 50g protein, and 100g+ clean carbs per serving to fuel muscle growth and recovery.

No Artificial Sweeteners

No Artificial Sweeteners

Gluten-Free and Non-GMO

Gluten-Free and Non-GMO

No Artificial Coloring

No Artificial Coloring

No Artificial Preservatives

No Artificial Preservatives

2 Flavors Available:

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Third-Party Testing

We believe trust is earned through transparency. That’s why we provide full access to our third-party test results, so you can feel confident in what you’re taking. View all third-party tests.

Transparent Labs Mass Gainer is made with nutrient-dense whole foods supplying high-quality protein, clean carbohydrates, and quality fats to help build muscle and support recovery.


Each serving provides 750 calories, 50g of grass-fed whey protein, and over 100g of complex carbs from oat flour, tapioca, and sweet potato.


With added creatine monohydrate, this mass gainer is ideal for muscle growth and sustained energy.

Orders in the US over $99 ship free.

Once your order has shipped out from our fulfillment center, you will receive a Shipping Confirmation email. If you selected a tracked shipping method, you will receive your tracking information, along with the necessary steps to track your order, within this email. Please note, orders are generally fulfilled same day or next business day.

Click here for the full shipping and delivery guide »

45 Day Satisfaction Guarantee

If you are not satisfied with your product, we will offer you a full refund or store credit for the value of the item within 45 days of delivery.

Click here for the full refund policy »

why use Mass Gainer?

A clean, whole food-based mass gainer designed to help you gain mass, support lean muscle growth, and accelerate recovery.

Enhance Muscle Growth

Packed with 50 grams of grass-fed whey protein per serving to maximize muscle protein synthesis.

Enhance Muscle Growth

Support Weight Gain

Provides 750 calories per serving to help meet your bulking goals.

Support Weight Gain

Clean Ingredients

Made with whole food-based carbs, no artificial sweeteners or fillers.

Clean Ingredients

Enhance Recovery

Includes creatine monohydrate to improve strength and post-workout recovery.

Enhance Recovery

Key Ingredients

Our formulas are made with clean, natural ingredients, with clinically-validated dosages to support health and performance.

Protein (from Grass-fed Whey Protein Concentrate)

53 g

A complete, easily digestible protein source derived from grass-fed dairy milk.

Protein (from Grass-fed Whey Protein Concentrate)

Healthy Fats (from MCT Oil and Coconut Milk)

15 g

Quality fat sources that are enriched in medium-chain triglycerides (MCTs) to support energy and metabolic functions.

Healthy Fats (from MCT Oil and Coconut Milk)

Healthy Carbohydrates (From Organic Tapioca Maltodextrin, Oat Flour, and Sweet Potato Powder)

110 g

These nutrient-dense carbohydrate sources provide complex carbohydrates for lasting energy and glycogen replenishment.

Healthy Carbohydrates (From Organic Tapioca Maltodextrin, Oat Flour, and Sweet Potato Powder)

Prebiotic Fiber (From VitaFiber® and Tapioca Fiber)

6 g

Whole-food prebiotic fibers that promote digestive function and overall gut health.

Prebiotic Fiber (From VitaFiber® and Tapioca Fiber)

Protein (from Grass-fed Whey Protein Concentrate)

53 g

Complete protein (i.e., a protein source that provides all nine essential amino acids) is paramount for muscle protein synthesis, ultimately contributing to muscle growth. Unlike many mass gainers that use low-quality protein sources, Transparent Labs Mass Gainer features grass-fed whey protein concentrate, a clean, easy-to-digest, complete protein well-known to support muscle growth and bolster muscle protein synthesis [1].

Protein (from Grass-fed Whey Protein Concentrate)

Healthy Fats (from MCT Oil and Coconut Milk)

15 g

Not all fat is "bad"; in fact, some fats are quite healthy and can be a healthy strategy to support weight gain.  We've upped the ante by including an ample dose of medium-chain triglycerides (MCTs) from MCT oil and coconut milk. 

MCTs are a special class of saturated fatty acids that are quickly absorbed and provide unique health benefits, such as increasing healthy cholesterol and fighting inflammation [2].

Healthy Fats (from MCT Oil and Coconut Milk)

Healthy Carbohydrates (From Organic Tapioca Maltodextrin, Oat Flour, and Sweet Potato Powder)

110 g

The carbohydrates in our weight-gain formula come from real food sources, including organic tapioca, oat flour, and sweet potato. This blend provides a balanced, easy-to-digest supply of fast-acting and long-lasting carb energy and replenishes muscle glycogen stores after workouts.

Healthy Carbohydrates (From Organic Tapioca Maltodextrin, Oat Flour, and Sweet Potato Powder)

Prebiotic Fiber (From VitaFiber® and Tapioca Fiber)

6 g

Prebiotic Fiber (From VitaFiber® and Tapioca Fiber)

Creatine Monohydrate

3 g

Creatine monohydrate has stood the test of time, and then some. It is the most clinically-proven athletic aid, with decades of scientific evidence demonstrating its positive impacts on muscle-building, recovery, and athletic performance [3, 4].

Creatine enhances ATP (adenosine triphosphate) production, which fuels short bursts of high-intensity exercise. This allows you to lift heavier and push more reps, leading to greater muscle growth. [5]

Ingesting creatine alongside carbohydrates, or a combination of carbohydrates and protein, can lead to greater creatine retention in the muscles compared to creatine alone. [6]

Creatine Monohydrate

Complete Your Stack

Pair Mass Gainer with these products for a complete foundational stack.
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Creatine HMB
Creatine HMB
Boost performance and build lean muscle with Creatine + HMB.
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Protein
Grass-Fed Whey Protein Isolate
Grass-Fed Whey Protein Isolate
Clean, grass-fed whey protein isolate with no artificial additives.
15 flavors available
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Pre-Workout
Blue Raspberry
Bulk Pre-Workout
Comprehensive muscle-building pre-workout formula.
9 flavors available
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Health & Wellness
Hydrate
Hydrate
Formulated with bioavailable electrolytes to promote optimal hydration.
9 flavors available
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9 flavors available
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Every Ingredient Matters To Make Every Effort Count.

Customer Reviews

Based on 910 reviews
82%
(747)
9%
(84)
5%
(47)
2%
(16)
2%
(16)
M
Morgan Ness

Put on 20 pounds within the first 3-4 months of consistency with the gym and 2 shakes a day.

J
Jacob
I might buy again

I like the clean ingredients and taste but this can’t mix for me at all. I see reviews saying it mixes so easily and I’m like what how?? I shake it for 2 minutes or more and take a sip and it’s so chunky. Once I finally get it to mix it’s great. I even tried using my ninja and that does better but still not fully smooth

L
Lawrence Schreiner
Absolutely great product

This stuff is excellent. Consistency is nice and light, I personally blend mine with 2% or skim milk for the extra protein and calories. Sooooo good.

C
Chris
Shipping woes

I should have followed advice from other reviews I saw. Was shipped the wrong product. When I reached I I was told the correct product was en route but given no tracking information.. after this experience I’ll just use Amazon moving forward

B
Brian Edmonds
Great product, excellent customer service!

On our second order. The product is 10/10. The customer service is even better. Shipping has been 4-6 days. No complaints. Highly recommend!

How to Use

1
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1

Step 1 – Mix It Up

Add two heaping scoops of Mass Gainer to 16 oz of water or milk in a shaker cup. *For those new to mass gainers, begin with half a serving (1 heaping scoop) daily for the first 2-3 days to allow your body to adjust to the increased caloric intake and assess your digestive tolerance.
2

Step 2 – Shake Well

Secure the lid and shake vigorously until smooth.
3

Step 3 – Consume Post-Workout

Mass Gainer is best taken shortly after a workout or as a high-calorie meal replacement during the day.
4

Step 4 – Use Daily

For best results, use consistently to help meet your calorie/nutrient intake goals alongside a strength-training program.

Disclaimer: Contains milk and coconut ingredients. Do not consume if you have allergies to tree nuts or dairy.

Frequently Asked
Questions

Is a Mass Gainer the same as a protein powder?

No. While mass gainers contain protein, they are not the same as protein powders. A protein powder typically contains just protein (with small/trace amounts of fat and carbs), whereas a weight (mass) gainer is formulated with protein plus carbs and fats; hence, weight gainers have considerably more calories than protein powders, and are better suited for muscle-building and weight gain.

Can I use a mass gainer every day?

Yes, you can use Transparent Labs Mass Gainer daily. However, it's important to use it as a supplement to other calorie-contributing foods and not as your primary source of nutrients.

Will a mass gainer help me build muscle even if I don’t work out?

No. Your muscles need a stimulus for hypertrophy to occur, and resistance training is the best (natural) way to provide that stimulus. Nutrients, especially protein, help your muscles rebuild after you've "damaged" them from exercise. If you remove exercise from the equation but continue eating a surplus of calories, you will gain mostly body fat (which may be beneficial and necessary if you're severely underweight).

Are there side effects of taking a mass gainer?

Mass-gainer supplements are typically well-tolerated, but digestive discomfort and bloating may sometimes occur, depending on your overall diet, gastrointestinal integrity, and inherent ingredient tolerances. We recommend starting with a half-serving of Transparent Labs Mass Gainer for the first few days so you can better assess how it affects your body.

Is a Mass Gainer the same as a protein powder?

No. While mass gainers contain protein, they are not the same as protein powders. A protein powder typically contains just protein (with small/trace amounts of fat and carbs), whereas a weight (mass) gainer is formulated with protein plus carbs and fats; hence, weight gainers have considerably more calories than protein powders, and are better suited for muscle-building and weight gain.

Can I use a mass gainer every day?

Yes, you can use Transparent Labs Mass Gainer daily. However, it's important to use it as a supplement to other calorie-contributing foods and not as your primary source of nutrients.

Will a mass gainer help me build muscle even if I don’t work out?

No. Your muscles need a stimulus for hypertrophy to occur, and resistance training is the best (natural) way to provide that stimulus. Nutrients, especially protein, help your muscles rebuild after you've "damaged" them from exercise. If you remove exercise from the equation but continue eating a surplus of calories, you will gain mostly body fat (which may be beneficial and necessary if you're severely underweight).

Are there side effects of taking a mass gainer?

Mass-gainer supplements are typically well-tolerated, but digestive discomfort and bloating may sometimes occur, depending on your overall diet, gastrointestinal integrity, and inherent ingredient tolerances. We recommend starting with a half-serving of Transparent Labs Mass Gainer for the first few days so you can better assess how it affects your body.

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