What Does Muscle After 40 Need?
For years, the advice was simple:
Eat more protein.
But scientists now understand that overcoming anabolic resistance isn't simply about eating more protein. Ageing muscle needs a stronger nutritional signal to effectively stimulate muscle protein synthesis. Research suggests that older adults require around 3 grams of leucine at each meal to maximise this response. They've been told to eat more protein. Very few have been told that the amount of leucine in that protein also matters.
There's another challenge.
Research also suggests that many adults over 40 aren't consuming enough high-quality protein to optimally support muscle health in the first place. So even when you're making an effort, your muscles may still not be receiving the nutritional support they need.
That's why every serve of 40UP delivers:
- 35.7 g of premium protein
- 3.5 g of leucine
Not by accident. But because the formula was designed around the changing nutritional needs of muscle after 40.
Designed Around the Biology of Muscle After 40
40UP wasn't developed by asking, "What ingredients should we add?" It was developed by asking, "What does muscle after 40 actually need?"
Every meaningful ingredient—and every meaningful dose—was chosen to support the changing nutritional needs of muscle after 40. It starts with 35.7 g of premium protein, providing the building blocks muscles need to repair, recover and grow. It delivers 3.5 g of leucine because research suggests older muscles need a stronger leucine signal to effectively stimulate muscle protein synthesis. It includes 3 g of creatine to support strength and performance, together with 10 g of Peptan® collagen peptides to support the collagen-rich connective tissues that work alongside muscle every time you move.
Emerging research suggests the ageing muscle environment itself may influence how muscles respond to anabolic signals. That's why 40UP also includes 4.8 g of additional glycine, selected as part of a formulation designed around the biology of muscle after 40. Vitamin D₃, magnesium, zinc, niacinamide, prebiotic fibre and MCTs complete the formula, each selected to support healthy muscle function, energy production and overall performance.
This isn't simply a higher-protein shake. It's purpose-built nutrition for muscle after 40.
Resistance Builds Muscle. Nutrition Makes It Possible.
Resistance exercise provides the stimulus that tells your muscles to adapt and grow. 40UP provides the nutritional support your muscles need to respond. Neither replaces the other. Together, they help you get the most from every workout, every walk, every game of tennis, every surf and every strength session.
Explore the evidence
40UP wasn't created by following trends. It was developed by following the science. Every meaningful ingredient and every meaningful dose reflects the latest understanding of anabolic resistance, muscle protein synthesis and the changing nutritional needs of muscle after 40. If you'd like to explore the research behind the formulation, our comprehensive 40UP Evidence File explains the science in greater detail and provides links to the published studies that informed its development.