Rule 1 | R1 Mass Gainer Chocolate Peanut Butter / 12 LB
When it comes to achieving your body composition goals, relying solely on your own efforts may only take you so far in terms of progress. Without proper supplementation, your dedicated workouts may not yield the desired results. Enter R1 Mass Gainer by Rule 1 Proteins, an effective solution to help you add the necessary mass and achieve your body goals. Packed with premium-quality ingredients, each serving of R1 Mass Gainer by Rule 1 Proteins provides 1,220 calories, over 250g of carbohydrates, and 40g of protein. These proteins are derived from three different whey sources, including the extensively researched supplement, creatine. What sets this product apart is not just what it contains but also what it excludes. R1 Mass Gainer by Rule 1 Proteins is free from any banned substances, ensuring natural and trustworthy results you can take pride in. It is also formulated without creamers, spiking agents, or soy protein, making it a specialized blend designed to offer you the most effective means of gaining mass.
When it comes to achieving your body composition goals, relying solely on your own efforts may only take you so far in terms of progress. Without proper supplementation, your dedicated workouts may not yield the desired results. Enter R1 Mass Gainer by Rule 1 Proteins, an effective solution to help you add the necessary mass and achieve your body goals. Packed with premium-quality ingredients, each serving of R1 Mass Gainer by Rule 1 Proteins provides 1,220 calories, over 250g of carbohydrates, and 40g of protein. These proteins are derived from three different whey sources, including the extensively researched supplement, creatine. What sets this product apart is not just what it contains but also what it excludes. R1 Mass Gainer by Rule 1 Proteins is free from any banned substances, ensuring natural and trustworthy results you can take pride in. It is also formulated without creamers, spiking agents, or soy protein, making it a specialized blend designed to offer you the most effective means of gaining mass.
When it comes to achieving your body composition goals, relying solely on your own efforts may only take you so far in terms of progress. Without proper supplementation, your dedicated workouts may not yield the desired results. Enter R1 Mass Gainer by Rule 1 Proteins, an effective solution to help you add the necessary mass and achieve your body goals. Packed with premium-quality ingredients, each serving of R1 Mass Gainer by Rule 1 Proteins provides 1,220 calories, over 250g of carbohydrates, and 40g of protein. These proteins are derived from three different whey sources, including the extensively researched supplement, creatine. What sets this product apart is not just what it contains but also what it excludes. R1 Mass Gainer by Rule 1 Proteins is free from any banned substances, ensuring natural and trustworthy results you can take pride in. It is also formulated without creamers, spiking agents, or soy protein, making it a specialized blend designed to offer you the most effective means of gaining mass.
When it comes to achieving your body composition goals, relying solely on your own efforts may only take you so far in terms of progress. Without proper supplementation, your dedicated workouts may not yield the desired results. Enter R1 Mass Gainer by Rule 1 Proteins, an effective solution to help you add the necessary mass and achieve your body goals. Packed with premium-quality ingredients, each serving of R1 Mass Gainer by Rule 1 Proteins provides 1,220 calories, over 250g of carbohydrates, and 40g of protein. These proteins are derived from three different whey sources, including the extensively researched supplement, creatine. What sets this product apart is not just what it contains but also what it excludes. R1 Mass Gainer by Rule 1 Proteins is free from any banned substances, ensuring natural and trustworthy results you can take pride in. It is also formulated without creamers, spiking agents, or soy protein, making it a specialized blend designed to offer you the most effective means of gaining mass.
in 21 offers
The lowest price for Rule 1 | R1 Mass Gainer Chocolate Peanut Butter / 12 LB right now is $109.95 at Spartansuppz, compared across 21 retailers.
The all-time low was $69.99 on 2 May 2025 — today's price is 57% above the lowest ever. It has been notably cheaper before — worth setting a price alert.
Prices last updated 16 Oct 2026.
Last updated at 16/10/2026 17:17:49
Rule 1 Mass Gainer High Calorie Weight Gainer Supplement 5.25 kg, Chocolate Peanut Butter (16 Servings)
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Rule 1 Mass Gainer Protein Powder, 5.20kg / Chocolate Peanut Butter
Delivery between 22–30 Oct $15.95
Rule1 Mass Gainer Chocolate Peanut Butter / 16 Serves
Delivery $27.18
Mass Gainer | High Calorie Weight Gainer | 16 Servings Chocolate Peanut Butter | 16 Servings
Rule1 R1 Mass Gainer | 1220 Calories, 40g Whey Protein & 250g Carbs per Serve | Australian Muscle 11.46lb (5.2kg) / Chocolate Peanut Butter
Free delivery between 21–29 Oct
Rule 1 Proteins Mass Gainer 11lb / Chocolate Peanut Butter
Delivery $9.95
Rule 1 Mass Gainer
Free delivery
Rule 1 Proteins Mass Gainer, Chocolate Peanut Butter, 16 Servings | High-Calorie Weight
Delivery $142.68
R1 Mass Gainer by Rule 1 Proteins 12lbs / Chocolate Peanut Butter
Free delivery
Rule 1 Mass Gainer, 16 Serve / Chocolate Peanut Butter // Powerhouse Supplements
Delivery $10
originally posted on walmart.com
RULE 1 Mass Gainer has transformed my fitness journey. The Chocolate Fudge flavor in the 11.46lb size is incredibly delicious. It mixes flawlessly, leaving behind a smooth and lump-free shake. The packaging is convenient and the 16 servings offer great value. With this mass gainer, I've experienced remarkable gains in size and strength. RULE 1 Mass Gainer deserves a resounding five-star rating!
| Flavor | Chocolate Fudge, Chocolate Peanut Butter, Cookies & Creme, Strawberries & Creme, Vanilla Creme |
| Protein Grams Per Serving | 40 g |
| Protein Type | All-whey protein |
| Form | Powder |
| Sugar Content | 14 g (total sugars) |
Rule 1 Mass Gainer High Calorie Weight Gainer Supplement 5.25 kg, Chocolate Peanut Butter (16 Servings)
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Rule 1 Mass Gainer Protein Powder, 5.20kg / Chocolate Peanut Butter
Delivery between 22–30 Oct $15.95
Rule1 Mass Gainer Chocolate Peanut Butter / 16 Serves
Delivery $27.18
Mass Gainer | High Calorie Weight Gainer | 16 Servings Chocolate Peanut Butter | 16 Servings
Rule1 R1 Mass Gainer | 1220 Calories, 40g Whey Protein & 250g Carbs per Serve | Australian Muscle 11.46lb (5.2kg) / Chocolate Peanut Butter
Free delivery between 21–29 Oct
RULE 1 Mass Gainer has transformed my fitness journey. The Chocolate Fudge flavor in the 11.46lb size is incredibly delicious. It mixes flawlessly, leaving behind a smooth and lump-free shake. The packaging is convenient and the 16 servings offer great value. With this mass gainer, I've experienced remarkable gains in size and strength. RULE 1 Mass Gainer deserves a resounding five-star rating!
| Flavor | Chocolate Fudge, Chocolate Peanut Butter, Cookies & Creme, Strawberries & Creme, Vanilla Creme |
| Protein Grams Per Serving | 40 g |
| Protein Type | All-whey protein |
| Form | Powder |
| Sugar Content | 14 g (total sugars) |
