Pure Isolate, Zero Filler — Rule1 Whey Isolate Protein 5lbs
Rule1 Whey Isolate delivers 25g of protein from a 100% whey isolate and hydrolysate blend — no concentrate, no fillers, no gums, no creamers. At 110 calories and 0g of sugar per serving, it is one of the cleanest macro profiles in the 5lb protein category. With 72–76 servings per tub and 11 flavours in stock, it is a high-value isolate built for athletes who want purity without paying a premium for a brand name. Bulldog Nutrition is an authorized Canadian and US retailer of Rule One Proteins — every tub is 100% authentic and ships fast across Canada and the US.
| Servings per tub |
72–76 |
| Protein per serving |
25g |
| Calories per serving |
110 |
| BCAAs per serving |
6g+ naturally occurring |
| Protein source |
100% whey isolate & hydrolysate blend (no concentrate) |
| Sugar per serving |
0g |
| Flavours available |
11 in stock (Pistachio Ice Cream, Strawberry & Banana, Vanilla Butter Cake + more) |
| Best for |
Lean gains, calorie deficit, high-purity daily protein |
Why Rule1 Whey Isolate?
- 25g protein per serving from 100% whey isolate and hydrolysate — no concentrate, no fillers, no gums
- 0g sugar and only 110 calories per serving — one of the leanest protein profiles in a 5lb tub
- 6g+ naturally occurring BCAAs per serving — including leucine, isoleucine, and valine for muscle recovery
- 72–76 servings per 5lb tub — excellent value per serving for a pure isolate formula
- 11 flavours in stock — one of the widest selections in the isolate category, including Pistachio Ice Cream, Vanilla Butter Cake, Frozen Banana, and Cafe Mocha
- 87% protein by weight — the true measure of an ultra-pure whey isolate formula
- No concentrates, fillers, or creamers — what you see on the label is what you get
Who Is This For?
Rule1 is for athletes who want a legitimate pure isolate at a competitive price point — without paying a premium for flashy branding. The 100% isolate and hydrolysate blend (zero concentrate) means faster absorption, lower lactose content, and a cleaner macro profile than most blended proteins. With 0g sugar, 110 calories, and 72–76 servings per 5lb tub, it stacks up extremely well against both blended proteins and other isolates in its category. The 11 in-stock flavours — including some genuinely unique options like Pistachio Ice Cream and Frozen Banana — mean you are not stuck with chocolate or vanilla.
Who Is This NOT For?
- ✗ Hard-bulk athletes needing high calories per shake — at 110 cal/serving, consider a mass gainer instead
- ✗ Vegans or vegetarians — dairy-derived whey protein
- ✗ Anyone with a severe dairy or lactose allergy — while isolate-based and low-lactose, this product contains milk
- ✗ Athletes subject to tested competition who require NSF or Informed Sport certification — Rule1 does not carry third-party testing; check certification requirements before use
- ✗ Under 18 — not intended for use by minors
What's In It?
Rule1 Whey Isolate is formulated from a blend of whey protein isolate and hydrolysate — the two fastest-absorbing, highest-purity forms of whey — with zero whey concentrate. This combination delivers 25g of protein at 87% protein-by-weight purity, with 0g of sugar, minimal carbohydrates, and over 6g of naturally occurring BCAAs per serving. The exclusion of concentrate, fillers, and gums keeps the formula clean and easy to digest. The formula contains no artificial growth hormones.
⚠️ Contains milk and soy. Always read the full label before use. These statements have not been evaluated by Health Canada or the FDA for disease treatment or prevention.
Why Buy From Bulldog Nutrition?
With over 10 years serving supplement customers across Canada and the US, Bulldog Nutrition is an authorized Canadian and US retailer of Rule One Proteins — meaning every Whey Isolate tub is sourced directly, 100% authentic, and never grey market or counterfeit. Rule1 delivers serious purity at a strong price point; buying from an authorized retailer ensures you are getting the genuine formula, not expired or counterfeit stock.
- ✓ Authorized retailer — authentic products only, never grey market or counterfeit
- ✓ Ships across Canada and the US — fast, reliable delivery to your door
- ✓ 10+ years in business — a track record you can rely on
- ✓ 4.4/5 stars from 31+ verified customer reviews
- ✓ Ongoing support available — reach us anytime via email or live chat
Add to cart and get one of Canada's best-value pure isolates — shipped fast to Canada and the US.
