Big-O Bar

68 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 68 Reviews
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Terri H.
United States United States

Big-o bar

I bought them as a gift for Christmas. I will say though that your products are amazing and I’m so excited to have access to them! Thank you for a worthy product and all your dedication to it!

sean h.
United States United States


Great protein bar. Fills you up, but not too filling at the same time. Tastes great, and the texture is awesome!

Rod H.
United States United States

Big-o bar

It was very good!! The taste of these bars are outstanding along with great nutritional facts as well.

Aaron B.
United States United States

Great tasting bar

These bars are filling and taste awesome! The only downside is there is too much sugar. So far fruity cereal is my favorite.

Dan T.
United States United States


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

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.