Optimum Nutrition Gold Standard 100% Whey Protein 5lbs
The World's Best-Selling Whey — Optimum Nutrition Gold Standard 100% Whey 5lb
For over 30 years, Optimum Nutrition's Gold Standard 100% Whey has held the top spot in protein powder sales worldwide — and it earned that position one scoop at a time. With 24g of whey protein isolate-led protein per serving and a formula trusted by competitive athletes and everyday gym-goers alike, it's the benchmark every other protein powder is measured against. Bulldog Nutrition is a verified authorized retailer of Optimum Nutrition for Canada and the US — every tub you order is 100% authentic and ships fast to your door.
| Servings per tub | 74 |
| Protein per serving | 24g |
| Calories per serving | 120 |
| BCAAs per serving | 5.5g naturally occurring |
| Protein source | Whey Isolate (primary), Concentrate + Peptides |
| Sugar per serving | 1g |
| Flavours available | 12 (Extreme Milk Choc, Double Rich Choc, Choc PB + more) |
| Best for | Lean muscle, recovery, daily protein goals |
Why Gold Standard 100% Whey?
- 24g of complete whey protein per serving — a clinically meaningful dose for supporting muscle protein synthesis after training
- 5.5g of naturally occurring BCAAs per serving — leucine, isoleucine, and valine present without synthetic additions
- 74 servings per 5lb tub — outstanding volume that keeps cost-per-serving well under $2 CAD
- 30+ year track record as the world's #1 selling whey protein — longevity that reflects consistent real-world results
- NSF Certified for Sport on select flavours — independently third-party tested for banned substances
- Lactase enzymes added to the formula — supports easier digestion compared to standard whey concentrate products
- Whey protein isolate listed first on the ingredient panel — higher protein-to-calorie ratio vs. concentrate-first competitor formulas
Who Is This For?
Gold Standard 100% Whey is built for consistent, regular trainers — anyone working out 3 or more days per week who wants to hit their daily protein targets without adding unnecessary calories, fat, or sugar. Whether your goal is building lean muscle, recovering faster between sessions, or simply making sure you're getting enough protein every day, this is the go-to choice. It works equally well mixed with water for a lean post-workout shake or blended with milk for a richer, higher-calorie option.
Who Is This NOT For?
- ✗ Anyone with a diagnosed dairy or milk allergy — Gold Standard Whey is derived from cow's milk and contains milk proteins
- ✗ Those seeking a plant-based or vegan protein source — this is an animal-derived product only
- ✗ Anyone with severe lactose intolerance — while lactase enzymes are included to aid digestion, the formula still contains whey protein concentrate with naturally occurring lactose
- ✗ Anyone under 18 — intended for adults with established training routines
What's In It?
Gold Standard 100% Whey uses a three-source protein blend: whey protein isolate (the primary ingredient), whey protein concentrate, and hydrolyzed whey protein peptides. Listing whey isolate first is significant — the majority of the protein comes from the faster-absorbing, more-filtered source with a higher protein-to-weight ratio. The formula also includes lactase enzymes to help break down lactose during digestion, which is a meaningful addition for those with mild dairy sensitivity. Naturally occurring glutamine (4g+ per serving) supports cellular recovery.
⚠️ Contains milk. May contain traces of soy, wheat, egg, and peanut depending on flavour. Always read the full label before use. These statements have not been evaluated by Health Canada or the FDA for the treatment, cure, or prevention of any disease or condition.
Why Buy From Bulldog Nutrition?
With over 10 years serving supplement customers across Canada and the United States, Bulldog Nutrition is a verified authorized retailer of Optimum Nutrition — meaning every tub of Gold Standard Whey we carry is sourced directly from ON, 100% authentic, and never grey market or counterfeit. When you buy from Bulldog, you get the same formula athletes around the world rely on, delivered fast to your door.
- ✓ Authorized ON 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 count on
- ✓ 4.85/5 stars from 48+ verified customer reviews
- ✓ Ongoing support available — reach us anytime via email or live chat
Add to cart and fuel your next training block — shipped fast to Canada and the US.
Shipping Information
Bulldog Nutrition ships across Canada and the United States. Most orders are processed within 1 to 2 business days.
Free shipping is available on eligible orders over $100. Please note that drink cases are excluded from free shipping due to size and weight.
During extreme hot or cold weather, heat-sensitive or cold-sensitive items may be affected in transit. For full details, please review our Shipping Policy.
Product & Site Disclaimer
Website information is provided for general informational purposes only. Product details, images, ingredients, and labels may change without notice, so customers should always review the actual product packaging received before use. For full details, please review our Product & Site Disclaimer.
Need Help?
For the fastest assistance, please use Live Chat on our website. You can also text SUPPORT to 1-833-497-3885 or use our Contact Us page for order, shipping, returns, and general support questions.