Likewise, if you were passed over for a promotion at work, perhaps you decided to buckle down and take on extra responsibilities at the office. If you go to a gym, you've likely considered a similar strategy that's predicated on finally getting serious about making some real improvements. While you may have no aspirations to compete, you'd like to see how far you can progress by following a dedicated 60-day program.
There's also evidence that, in the long term, consuming too much protein can lead to an increased risk of osteoporosis and can also worsen existing kidney problems. "Although protein shakes are convenient, not all of them are suitable to be used as a meal replacement, because they don't have all the vitamins and nutrients that a balanced meal would contain." Along with a third cofounder, Nathan Blecharczyk, Gebbia and Chesky started what was at the time called Airbedandbreakfast.com.
Because research suggests that creatine supplementation increases muscle power, scientists surmised that regular supplementation could increase the ratio of dihydrotestosterone to testosterone. Another study evaluated the effects of creatine supplementation on biomarkers associated with overtraining. In 2012, Brazilian researchers recruited 25 male soccer players with an average age of 17 years old and randomly assigned them to one of two groups. The first group of consumed 0.3 g/kg of creatine while the second group consumed 0.3 g/kg of placebo tablets for seven days.