R1 Protein Whey Isolate is made with super-pure whey isolate, fast-acting partially hydrolyzed whey isolate, and virtually nothing else. This elite formula completely omits the use of whey protein concentrates, creamers, amino spiking, banned substances, and other things that dilute what you really came for – protein. Even better, it tastes great too. Informed Choice Certified. Regularly tested for banned substances by the world class sports anti-doping lab, LGC.
R1 Protein Whey Isolate is made with super-pure whey isolate, fast-acting partially hydrolyzed whey isolate, and virtually nothing else. This elite formula completely omits the use of whey protein concentrates, creamers, amino spiking, banned substances, and other things that dilute what you really came for – protein. Even better, it tastes great too. Informed Choice Certified. Regularly tested for banned substances by the world class sports anti-doping lab, LGC.
Rule 1 R1 Protein 1.5lb Birthday Cake
R1 Protein Whey Isolate is made with super-pure whey isolate, fast-acting partially hydrolyzed whey isolate, and virtually nothing else. This elite formula completely omits the use of whey protein concentrates, creamers, amino spiking, banned substances, and other things that dilute what you really came for – protein. Even better, it tastes great too. Informed Choice Certified. Regularly tested for banned substances by the world class sports anti-doping lab, LGC.
R1 Protein Whey Isolate is made with super-pure whey isolate, fast-acting partially hydrolyzed whey isolate, and virtually nothing else. This elite formula completely omits the use of whey protein concentrates, creamers, amino spiking, banned substances, and other things that dilute what you really came for – protein. Even better, it tastes great too. Informed Choice Certified. Regularly tested for banned substances by the world class sports anti-doping lab, LGC.
in 8 offers
The lowest price for Rule 1 R1 Protein 1.5lb Birthday Cake right now is $89.95 at Mr Supplement, compared across 7 retailers.
The all-time low was $89.95 on 2 Nov 2026. That's the lowest price we've ever tracked — a great time to buy.
Prices last updated 2 Nov 2026.
Last updated at 02/11/2026 13:42:18
Rule 1 R1 Protein Whey Isolate - 680g / 22 Serves Birthday Cake
Delivery between Wed – Thu $9.95
Rule 1 Protein Isolate
Free delivery
Rule 1 Isolate By Rule 1 Prot | Supports Muscle Recovery | Meltonsupps 1.5 Lbs / Birthday Cake
Delivery between 6–16 Nov $12.95
Rule 1 Protein Whey Isolate, 1.5 lbs / Birthday Cake // Powerhouse Supplements
Delivery $10
Rule 1 Proteins R1 WPI Protein 1.46lb / Birthday Cake
Delivery $9.95
R1 Protein Whey Isolate by Rule 1 - 1.5lb / Birthday Cake | Supplement Mart
Delivery between 5–12 Nov $12.95
R1 Protein Whey Isolate – Fast-Absorbing WPI 1.5lb / Birthday Cake
Delivery between 6–11 Nov $15
| Flavor | Chocolate Fudge, Birthday Cake, Cafe Mocha, Chocolate Peanut Butter, Cookies & Creme |
| Form | Powder |
| Protein Grams Per Serving | 25g |
| Protein Type | Whey Isolate |
| Meal Replacement? | Yes |
Rule 1 R1 Protein Whey Isolate - 680g / 22 Serves Birthday Cake
Delivery between Wed – Thu $9.95
Rule 1 Protein Isolate
Free delivery
Rule 1 Isolate By Rule 1 Prot | Supports Muscle Recovery | Meltonsupps 1.5 Lbs / Birthday Cake
Delivery between 6–16 Nov $12.95
Rule 1 Protein Whey Isolate, 1.5 lbs / Birthday Cake // Powerhouse Supplements
Delivery $10
Rule 1 Proteins R1 WPI Protein 1.46lb / Birthday Cake
Delivery $9.95
| Flavor | Chocolate Fudge, Birthday Cake, Cafe Mocha, Chocolate Peanut Butter, Cookies & Creme |
| Form | Powder |
| Protein Grams Per Serving | 25g |
| Protein Type | Whey Isolate |
| Meal Replacement? | Yes |
