SKU: 22322170712

R1 Mass Gainer

Sale price$148.45 Regular price$164.95
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Ships within 48 hours · Estimated delivery Sep 19 - Sep 24

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Description

R1 Mass GainerR1 Mass Gainer by Rule One Proteins is a high calorie supplement formulated for individuals aiming to increase muscle mass and size. Each serving delivers over 1,220 calories, combining more than 250 grams of carbohydrates with 40 grams of protein sourced from a blend of whey concentrate, isolate, and hydrolysate. This 6: 1 carbohydrate to protein ratio is designed to support rapid weight gain and muscle recovery. The formula is enhanced with

R1 Mass Gainer by Rule One Proteins is a high-calorie supplement formulated for individuals aiming to increase muscle mass and size. Each serving delivers over 1,220 calories, combining more than 250 grams of carbohydrates with 40 grams of protein sourced from a blend of whey concentrate, isolate, and hydrolysate. This 6:1 carbohydrate-to-protein ratio is designed to support rapid weight gain and muscle recovery.

The formula is enhanced with creatine, medium-chain triglycerides (MCTs), and glutamine to further support muscle growth and energy levels. Additionally, it provides 9 grams of naturally occurring branched-chain amino acids (BCAAs) per serving. R1 Mass Gainer is free from creamers, soy protein, and banned substances, and it is Informed Choice® Certified, ensuring it has been tested for prohibited substances by a world-class sports anti-doping lab.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 22322170712

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4.1 ★★★★★
Based on 27 reviews
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Verified Purchase
zach
Omaha, US
★★★★★ 4
I could be a foot model now!!!
Size: 1 pair black L
I wear work boots almost all of the time so I bought these to put on my feet with salycylic acid to moisturize and try to get rid of a stubborn corn on the ball of my foot. It helped drastically after a few nights of lounging in the house with them on.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 11, 2026
K
Verified Purchase
K. Davis
Phoenix, US
★★★★★ 5
Works for foot psoraisis
Size: 2 pairs black L
Got these for work (service industry) to reduce issues with psoriasis and blisters while putting on 20k+ steps a day. Over time the wounds healed and I could work without so much pain. I now don't use them all the time like I used to, only when a new lesion or blister appears, too prevent a breakout. Tip: if you're not in full breakout, wear thick socks under these as a barrier to friction.
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Reviewed in the United States on April 28, 2026
K
Verified Purchase
Kim C
Massapequa, US
★★★★★ 4
Work well but run small
Size: 1 pair black L
They do seem to run a bit small. I bought them for my bf but snagged them from him because I couldn’t resist! I’m about a W8/12 and they were just a little big but unlike others, I just put them on while sleeping and didn’t walk around with them. If you’re just planning on that, they did a great job at sloughing and moisturizing 😎
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Reviewed in the United States on April 25, 2026
A
Verified Purchase
Aaron Duncan
West Palm Beach, US
★★★★★ 5
Good socks they work.
Size: 2 pairs black L
I normally wear size 13&half to 14 men's, and these fit me ok. They sit just below the ankle. They can get a little tight for me so you should look out for that if you are on the thicker side. But they work as advertised and help moisturize your feet. I recommend wearing them if you're going to just be hanging around home for a bit in one spot as they can be a little slippery to walk in if you go fast. Would not recommend going up and down stairs.
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Reviewed in the United States on August 28, 2025
B
Verified Purchase
Brian
Fort Morgan, US
★★★★★ 5
Good socks
Size: 1 pair black L
Good socks
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Reviewed in the United States on May 6, 2026

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