Big-O Bar

64 reviews
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O15 Nutrition Big O Protein Bar Web Banner Name

The first product from the new brand O15 Nutrition by Mr. Olympia Brandon Curry. The 100g Big-O bar represents whole-food meal replacement at its finest. It is built on 4 key ingredients (peanut butter, honey, 100% whey protein hydrolysate, and MCT oil) to provide satiation and nutrient-rich calories that your body can utilize for physical performance and recovery.

O15 Nutrition Big O Bar Callouts

The Peanut Butter and MCT Oil provide a strong healthy fat base for energy and cognitive support.  The super-food honey is the primary carbohydrate giving you a low-glycemic energy source. Each bar boasts 24g or more of premium protein from 100% Whey Hydrolysate and Peanut Butter. 

These ingredients will not cause GI discomfort since they are derived from whole foods. Ingredients that are easier to digest equals more nutrients toward muscle tissue repair, glycogen replenishment, and cognitive function. 

Available in Birthday Cake and Fruit Cereal, Big-O bars can be consumed as a snack or as a meal in and of itself. 

O15 Nutrition Big O Bar Fruity Cereal Banner

Customer Reviews
4.9 Based on 64 Reviews
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Filter Reviews:
Dan T.
United States United States

That right , you read that correctly! Try it and experience your big O !

Robert S.
United States United States
no gritty/dry taste

these are my go to pre-workout, the right amount of carbs and protein, taste is FANTASTIC

Roc M.
United States United States
The Big-O Fruity-Peanut butter

The BIG-O bar is visually bigger than most bars in comparison. The calories are higher as well, about double on average. I brought the *fruity cereal peanut butter" Personally, the fruity cereal flavor is a lot less tasting than the more dominant peanut butter tang. This by far doesn't lower its value whatsoever The 27 grams of protein is the best one can get that I have seen overall. I give this bar and the value a high degree of 4.75 stars if I could, 5 out of 5. I recommend this product highly.

Tiger Fitness Big-O Bar Review
Michael G.
United States United States

This is my favorite protein bar!

Albert L.
United States United States
Best chocolate bar

Outstanding. All 3 flavors are great.

Nutrition Info

Warning Concerning California Residents: This product may contain chemicals known to the State of California to cause cancer and birth defects or reproductive harm.