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Rule 1 Proteins R1 Protein Whey Isolate, Chocolate Fudge, 71 Servings

Based on 394 reviews
Condition: New
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$119.99

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Availability: In Stock.
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Arrives Friday, Nov 13
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At a glance

Condition
New
Flavor
Chocolate Fudge
Size
5 lb (Pack of 1)
Model
RZ0405
Dimensions
8 x 8 x 11 in
Weight
5 lb
Diet Type
Gluten Free

Features 6

  • Flagship Protein Powder: With 100% of the protein derived from whey isolate sources, the pinnacle of our protein lineup is pure, fast-acting, and available in a wide variety of amazing flavors (artificially flavored) to suit every preference
  • Protein & Amino Packed: Provides 25g of protein and 6g of naturally occurring branched chain amino acids (BCAA) per serving for daily fortification and recovery after workouts-delivered in smooth, delicious flavors you'll look forward to
  • Ultra-Clean Macros: R1 Protein Whey Isolate contains no whey concentrates, added sugars, gums, creamers, gluten, or amino spiking. It's also virtually lactose & cholesterol free, with a clean taste and no unwanted aftertaste
  • Anytime Formula: R1 Protein Whey Isolate works well first thing in the morning, before or after workouts, between meals as a snack, or anytime for a high protein treat-with a range of indulgent flavors that make it easy to enjoy anytime

Description

What is R1 Protein Whey Isolate? An exceptionally pure, fast-acting high-protein drink mix made with isolated whey proteins that have been extensively filtered to remove fat, carbohydrates, lactose, and cholesterol. The macros are about as clean as proteins get. How is R1 Protein Whey Isolate different than other whey proteins? 100% of the protein in R1 Protein Whey Isolate is from intact and hydrolyzed whey isolates. These premium sources yield higher protein content and contain significantly less fat and sugar than concentrates used in typical 100% whey protein formulas. When are the best times to use R1 Protein Whey Isolate? R1 Protein Whey Isolate is best used before and after workouts when fast-delivery of EAAs and BCAAs is most beneficial for muscle repair and recovery. How do I prepare R1 Protein Whey Isolate? Simply mix one scoop of R1 Protein Whey Isolate with 6-8 oz. of cold water, milk, or juice in a shaker cup or in a glass with a spoon. For added variety and nutrient boost, try blending R1 Protein with ice and fruit to create delicious smoothies. Is R1 Protein Whey Isolate suitable for competitive athletes? As an Informed Choice certified product, R1 Protein Whey Isolate is regularly tested for the presence of banned substances by world-class anti-doping laboratory, LGC. More About Rule One Proteins As one of the few brands that actually crafts the advanced formulas it brings to market, Rule One Proteins has it's own U.S. based manufacturing facility that uses only premium, globally sourced ingredients to produce a full lineup of protein & performance powders. This hands-on approach lets the brand control every step, minimize inefficiencies, and maximize quality—so every scoop can be trusted to be the very best it can be. R1 Protein Whey Isolate R1 Protein Natural Clear Whey Isolate Whey Protein Source 7 Protein Clean Gainer Casein Protein

Specs 23

Product Dimensions 8 x 8 x 11 inches; 5 pounds
Item model number RZ0405
Manufacturer Rule One Proteins, LLC
Flavor Chocolate Fudge
Diet Type Gluten Free
Product Benefits Informed Choice Certified, Informed Protein Certified
Protein Source Whey
Total Servings Per Container 71

Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Friday, Nov 13

This item is non-returnable:

Non-returnable due to Food safety reasons

View our full returns policy here.

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Top Amazon Reviews


Mixes smooth, tastes good without being overly sweet
Flavor Name: Chocolate Fudge Size: 5 Pound (Pack of 1)
This has become part of my regular routine — mixes easily with just a shaker bottle, no clumping or chalky texture left at the bottom like some isolates have. The chocolate flavor is rich without tasting artificial or overly sweet, easy to drink even without adding anything else. Good protein content per scoop without a bunch of unnecessary fillers. Doesn’t sit heavy or cause any stomach discomfort, which has been an issue for me with other whey products in the past. Works well blended into a smoothie too if I want to switch it up. Solid option if you want a clean-tasting protein that actually mixes well. ... show more
Reviewed in the United States on August 17, 2026 by Melissa Lower

A really good solid isolate protein. You cant go wrong.
Flavor Name: Chocolate Fudge Size: 5 Pound (Pack of 1)
A really great protein, mixes well, good taste and digests well. The one thing I did note is that It did give leave me more gassy than with some other protein powders that I have tried. That being said, I would still buy it again if it comes back down in price.
Reviewed in the United States on June 5, 2026 by Brett Stafford

A Staple for hitting Protein Goal
Flavor Name: Chocolate Fudge Size: 5 Pound (Pack of 1)
The chocolate fudge is one of my favorite and go to flavors. I've been taking this product for over a year to hit my daily protein goal and it has helped me cut 15% body fat! Would definitely recommend to those looking to build lean muscle or increase daily protein in take.
Reviewed in the United States on May 13, 2026 by Tim

Great taste, good mixability.
Flavor Name: Chocolate Fudge Size: 2 Pound (Pack of 1)
There's not more to be said, it tastes amazing, it mixed super well, no chalky or weird aftertaste. At the time good price to serving ratio. With the whey protein shortage, and respective price increases i would not recommend. On sale, or if the prices ever come down, hands down a baller product.
Reviewed in the United States on July 12, 2026 by Elias Gonzalez

Delicious and healthy (but needs a smaller scooper)
Flavor Name: Chocolate Fudge Size: 2 Pound (Pack of 1)
This product is delicious and healthy. It’s not Godiva, but it’s better than other chocolate protein drinks I’ve tried. My only issue with this is the size of the scooper. It’s enormous, which makes it very difficult to add a scoop to a standard water bottle. Nothing a funnel doesn’t fix, but I wish I didn’t need extra equipment. ... show more
Reviewed in the United States on March 6, 2024 by h.a.phe

Great option
Flavor Name: Chocolate Fudge Size: 2 Pound (Pack of 1)
I was recommended this protein by my trainer and it’s a great choice. I usually go for vanilla protein drinks because I’m not a fan of the chocolate ones (which seems to be everywhere) but I accidentally ordered the chocolate and I’m pleasantly surprised that I like it. I mix it with a little peanut butter, almond milk, and ice and it’s a great start to my day or afternoon snack. I’ll be trying other flavors after I finish this giant tub but so far I do like the chocolate flavor, it’s sweet but not the same as a chocolate milk that you usually get with the Fairlife chocolate protein drinks. ... show more
Reviewed in the United States on June 14, 2025 by Briana

Good protein powder
Flavor Name: Chocolate Fudge Size: 5 Pound (Pack of 1)
Awesome product.
Reviewed in the United States on June 15, 2026 by Max

BUY THIS
Flavor Name: Chocolate Fudge Size: 5 Pound (Pack of 1)
I LOVE this protein powder. I’ve tried others and this one truly reigns supreme. It’s blends well, it’s never gritty, all flavors taste good in shakes combined with other ingredients or by themselves, AND It’s low in sodium and carbs. Great price point for high quality product.
Reviewed in the United States on July 12, 2025 by Jakajah
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