Age-related muscle loss may occur, impacting muscle mass, muscle strength and muscle recovery, which is a key component of training. Depending upon the athlete and level of training, the aging athlete may experience more challenging muscle recovery needs than younger adults. The FIT40 Muscle Recovery Protein is designed specifically for the aging athlete, with 30 G of primarily whey protein isolate and added L-Leucine to help support muscle protein synthesis and subsequent recovery.

  • 30 grams of high-quality, complete protein from Whey Protein, including Whey Isolate and Hydrolyzed Whey
  • 4 grams of L-Leucine to help optimize recovery and support muscle protein synthesis
  • 2 grams of sugar (naturally occurring sugar in whey)
  • 150 calories per serving

HOW TO USEThumbnail

For optimal recovery, consume post-workout. Add to any liquid, food and/or recipe to help support muscle protein synthesis. For healthy adults, consume enough protein to meet your daily protein requirements with a combination of high protein foods and protein supplements throughout the day as a part of a balanced diet and exercise program.


At ON we are proud to know that we are one of the few sports nutrition companies who own and operate their own production facilities. While it’s true that ON is one of the world’s largest producers of sports nutrition products, we remain focused on being recognized as the best. In fact, our requirements for raw materials are so strenuous that it’s not unusual for ON Quality Assurance Technicians to reject entire truckloads of raw materials that do not meet our high standards. We like to think that we take as much pride & care in crafting our award-winning supplements as our consumers do with crafting their physiques and fitness accomplishments.


Optimum Nutrition’s Award Winning supplements have consistently delivered the Highest Quality products to athletes across the globe — Here is a brief look at how.

Click here for full podcast playlist.