what's the difference between this one and serious mass?

This is much easier to digest, healthier, better protein and nutrients and only one scoop compared to 4 which becomes chalky and hard to drink. This tastes a lot better than serious mass and is much easier to drink overall. I drank this with reduced fat milk for 3-4 months straight and gained 20 lbs. of course I was also tracking and lifting weights, but this helped a ton to get those extra 800 calories I needed that I couldn’t obtain through meals and a lot of cooking.

I'm most concerned about it causing gas. Any comments?

NO Gas with vanilla custard and i give this to my 98 yr old MOTHER who weight 80 LBS as a supplement !! SHE Wd get it cuase shes in a wheelchair- Just finished a 10 lb bag.. DO need to drink WATER cuase HIGH protein can stop u up.. I also add ice cream to it:) tastes great! Good stuff- Doc approved! Shes in GREAT shape + he does Labs on her al the time.

If this is so good, it makes me wonder why it has twice the protein and is $45 cheaper per 10lb bag than Gold Standard - the same company.

Which Gold Standard are you looking at? This is a lean weight gainer vs protein vs bulking weight gainer. Sometimes the wholesalers give us deals if we purchase a large amount at a time. Some sellers (myself included) will discount the price in relationship with the "cost" associated with the product I sell.

Which is better for bulk muscle mass: serious mass or pro gainer

Serious Mass is a high-calorie gainer with 1,250 calories and 60 grams of protein per serving. PRO Gainer is a high-protein gainer with 60 grams of protein per serving at 650 calories.

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

Optimum Nutrition GS Pro Gainer Weight Gainer Protein Powder, Double Chocolate, 5.09 Pounds (Packaging May Vary)

Optimum Nutrition GS Pro Gainer Weight Gainer Protein Powder, Double Chocolate, 5.09 Pounds (Packaging May Vary)

Product ID: 1262095

Details

Brand
Optimum
Diet Type
Kosher
Flavor
Double
Item Weight
5.09 Pounds
Servings per Container
14

⚡85g carbs for energy restoration

💪60g high-quality protein blend

🔥650 calories per serving

Buy anything from 5,000+ international stores. One checkout price. No surprise fees. Join 2M+ shoppers on Desertcart.

฿10481

Duties & taxes included

In stock

Sold byAmazon ThailandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Thailand.

Secure transaction

Description

💥 Bulk smarter, recover faster, and taste the gains!

CALORIE POWERHOUSE - Fuel your gains with 650 clean calories per serving, designed to maximize muscle growth without unnecessary fillers.
NUTRIENT RICH BOOST - Infused with 32 essential vitamins & minerals plus immune-supporting Vitamin C, Zinc, and Vitamin E for holistic wellness.
CARB RECHARGE FORMULA - 85 grams of carbohydrates replenish energy stores fast, keeping you ready for your next training session.
EFFORTLESS MIX TASTE - Smooth double chocolate flavor that blends seamlessly—no clumps, no chalky aftertaste, just pure indulgence.
PROTEIN PACKED PERFORMANCE - 60 grams of premium protein blend supports lean mass development and accelerates recovery post-workout.

Optimum Nutrition GS Pro Gainer is a scientifically formulated weight gainer protein powder delivering 650 calories, 60g of high-quality protein, and 85g of carbohydrates per serving. Enhanced with 32 vitamins and minerals including immune-supporting nutrients, it’s designed for active professionals aiming for clean muscle mass gains. Its smooth double chocolate flavor mixes effortlessly, making it the go-to post-workout or between-meal shake for serious bulkers.

Specifications

ASIN	B0015R3A1S
ASIN	B0015R3A1S
Age Range Description	Adult
Allergen Information	Milk, Soy
Best Sellers Rank	#13,671 in Health & Household ( See Top 100 in Health & Household ) #7 in Sports Nutrition Weight Gainers #1,276 in Sales & Deals
Brand Name	Optimum Nutrition
Customer Reviews	4.6 4.6 out of 5 stars (1,386)
Date First Available	April 28, 2004
Department	unisex-adult
Diet Type	Kosher
Flavor	Double Chocolate
Global Trade Identification Number	00748927029710
Is Discontinued By Manufacturer	No
Item Dimensions	8.06 x 8.06 x 11.18 inches
Item Weight	5.09 Pounds
Item model number	1077890
Manufacturer	Optimum Nutrition - NutWell
Manufacturer	Optimum Nutrition - NutWell
Manufacturer Part Number	1077890
Model Name	GS - Pro-Gainers Weight Gainer - Protein Powder
Model Number	1077890
Number of Items	1
Package Type Name	Tub
Product Benefits	Muscle Growth, Weight Gain
Product Dimensions	8.06 x 8.06 x 11.18 inches; 5.09 Pounds
Protein	35.5 Grams, 60 Grams
Protein Source	Casein, Whey
Recommended Uses For Product	Immune Support
Total Servings Per Container	14
UPC	748927029710
Unit Count	81.44 Ounce
Vitamins And Minerals	0.55, 29, 330, 340, 4, 600, 7.5, 80 Milligrams, 20, 25, 340, 35, 50, 60 Percent Daily Value

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Fatima A.

Best international shipping I've ever tried. Worth every penny!

3 days ago

Abdullah B.

Great price for an authentic product. Fast international shipping too!

3 weeks ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.