A Randomized, Placebo Controlled Trial of L Max in Healthy Adult Athletes

This study is testing whether a supplement called L Max can improve breathing performance and endurance in competitive athletes who feel their lungs are holding them back during intense training. **You may be eligible if...** - You are between 18 and 60 years old and based in the US - You are a serious endurance athlete (cycling, triathlon, or running) who trains intensely at least 3 times per week - You feel like your breathing or lungs limit your performance - You are willing to use monitoring devices (Oura ring, spirometry, training apps) - If you have exercise-induced asthma, you use your inhaler only as a rescue device, not preventatively **You may NOT be eligible if...** - You are pregnant or not using effective contraception (if you are a woman of childbearing age) - You are not a committed endurance athlete - You have significant respiratory conditions beyond exercise-induced asthma Talk to your doctor to see if this trial is right for you.