
Optimum Nutrition Protein Energy
- 120mg of caffeine from natural sources
- Contains vitamins B6 and B12
- Only 100 calories per 2-scoop serving
- Mixes easily into water using just a spoon
- On Everything Earn Points
- With All Orders Free Samples
- On $99+ Free Shipping
- Guarantee Money Back

Earn 2 points for every dollar you spend at Muscle & Strength! Spend your points on order discounts, fitness gear and exclusive products.

Try before you buy! You can choose 2 free samples with every order you place at Muscle & Strength.

We ship fast! USA orders placed before 6pm EST will be shipped the same day.
International orders placed before 4pm EST will be shipped the same day.

Not happy with your purchase? No problem. Simply return it to us within 60 days and we'll replace it, credit your account, or give you a full refund.
PayPal Message
Due to PayPal's Acceptable Use Policy, this product cannot be purchased using PayPal. Choose a different option when checking out.
Questions? Contact Us.

If you have any questions about products please call us on 1-800-537-9910 or email support@muscleandstrength.com
Help Fuel Your Day with Protein Energy!
Your active lifestyle doesn’t leave much time to spare. Now there’s a convenient, take anywhere solution to fuel your day with premium whey protein and caffeine from natural sources. ON’s Protein Energy is ideal first thing in the morning, late in the afternoon or anytime you feel the need for 20 grams of quality protein stacked with 120 mg of caffeinated energy per 2-scoop serving – about as much as a 10oz cup of coffee. Each serving also delivers antioxidant vitamin E along with a blend of B vitamins.*
The powder is instantized to mix easily into water or milk using just a glass and spoon, and the flavor options are something you'll look forward to enjoying throughout the day. Use new Protein Energy as a foundation for creating smoothies or mix it up all by itself. At just 100 calories per 2-scoop serving and only a gram of carbs and sugar, you can use ON’s Protein Energy anytime you need Fuel & Energy!*
A 2-scoop serving provides:
- 20g Premium Whey Protein
- 120mg Caffeine from Natural Sources
- Green Tea Extract
- Vitamins B6 & B12
- Antioxidant Vitamin E
The convenient re-sealable zipper bag easily fits in your kitchen cabinet, laptop bag, backpack, or anywhere you need Fuel & Energy throughout your day!*









