The Science of Switch On

Resilient Nutrition

THE RATIONALE BEHIND SWITCH ON A huge number of us don’t look, feel or perform our best because we don’t routinely sleep well. There are many forms of sleep problems. Some sleep issues are common, such as recurrent sleep restriction (not getting as much sleep as needed) and “social jetlag” (shifting sleep times between workdays and work-free days). Other sleep problems are more debilitating, however, and these include 6 broad categories of sleep disorders (insomnia, circadian rhythm sleep-wake disorders, sleep-related breathing disorders, sleep-related movement disorders, parasomnias, disorders of hypersomnolence). Perhaps unsurprisingly, some sleep problems have been exacerbated by COVID-19 lockdowns....

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L-Tyrosine: Effects on Exercise and Health, and How to Take It

Greg Potter

In Part 1 of this series, we looked at how L-tyrosine affects cognitive performance, mood, and emotion regulation. Today we’ll explore other effects of L-tyrosine, including whether it affects your exercise performance, your ability to regulate your body temperature, and your thyroid function. We’ll end by assessing the best ways to take L-tyrosine, and whether some people should think twice before they try it.     Key takeaways L-tyrosine might be helpful for exercise done in cold conditions that requires fine-motor skills and/or a lot of cognitive effort. If you’re middle aged or older, taking L-tyrosine before cold exposure can...

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L-Tyrosine: Effects on Memory, Mood, ADHD, and More

Greg Potter

Lots of people have recently become interested in whether supplementing with L-tyrosine can improve performance at work and lift mood, in part because of the opinions put forward by scientists and influencers on podcasts and social media. While tuning into commentary by these people, I’ve at times felt frustrated by their lack of depth and clarity, so in the next 2 blogs we’ll focus on what the science of L-tyrosine actually shows. The good news is that L-tyrosine can be handy in many contexts. Used intelligently, it can help you beat brain fog and more. In this blog, we’ll focus on the effects of...

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