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Can the gut microbiota be trained?
Athletes that follow an exercise and dietary regimen usually expect to see a performance benefit for their efforts. Also impacted by these f
Alex Mohr
8 min read


Do athletes need fish oil supplements?
In a previous blog we covered briefly what fish oil is and what omega 3 fatty acids are. We also looked at some health claims. Here we...
Nathan Lewis
4 min read


Fish oil: what is it?
Fish oil is a dietary source of omega-3 fatty acids which have been linked to various health effects. Omega-3 fatty acids play a role in...
Asker Jeukendrup
4 min read


How to fuel for a marathon
Marathon runners are starting to pay more and more attention to their nutrition. No one ever questions the importance of training, yet...
Asker Jeukendrup
13 min read


Creatine, cognition, and concussion: What does the evidence really show?
Creatine affects muscle but also the brain. Can it be a useful supplement to improve cognitive function or reduce the effects of concussion?
Eric Rawson
3 min read


Creatine and its effects on performance
This post describes the effects of creatine on performance. It is simply a summary of current scientific understanding.
Asker Jeukendrup
5 min read


What causes an athlete’s leaky gut?
The intestine is responsible for absorption of nutrients but also to keep large molecules and germs out of our bodies. It has been...
Asker Jeukendrup
5 min read


Cannabidiol (CBD): Claims, risks and unanswered questions
Background Cannabis is a herbaceous plant that is perhaps best known for its role as a recreational drug. There is however growing...
Graeme Close and Andreas Kasper
6 min read


Low bone density in cyclists
There is accumulating evidence to suggest that most elite cyclists have lower bone mineral density values compared with non-elite cyclists.
Asker Jeukendrup
4 min read


HMB magic muscle building supplement or waste of money?
β-hydroxy-β-methylbutyrate (or HMB) is a popular muscle building supplement. HMB is a metabolite derived from the essential amino acid...
Asker Jeukendrup
5 min read


Can omega 3s “muscle in” on protein synthesis rates?
There are many claims now that omega-3 fatty acids can optimise muscle building. But what are the claims based on? is there evidence? The...
Olly Witard
4 min read


Improving sleep for recovery
Sleep is essential for recovery of the brain and body, yet many athletes have problems falling asleep or may wake up during the night,...
Asker Jeukendrup
4 min read


Contamination of nutrition supplements
Many supplements are manufactured to very high standards, but a significant percentage that are available for purchase, are not.
Asker Jeukendrup
3 min read


Risks of supplement use
Supplements may have benefits in certain situations but they also come with risks. What are the risks and how can we mitigate them?
Asker Jeukendrup
4 min read


Are my iron levels affecting my performance?
What is iron deficiency? How common is it? whom is at risk and how can you measure it?

Caroline Tarnowski
5 min read


Concerns about truth of labelling of supplements and food products
A nutrition supplement may not always contain what you think it contains. Concerns about nutrition labelling of supplements and the...
Asker Jeukendrup
4 min read


Do ketone esters spare glycogen and improve performance?
Are ketone esters really such a magical supplement?
Asker Jeukendrup
4 min read


What you can eat and do to reduce becoming infected with respiratory pathogens like the corona virus
What is the role for nutrition in reducing infections? Can supplements "boost" immunity?
Michael Gleeson
8 min read


Effects of dietary supplements on adaptations to endurance training
Supplements such as sodium bicarbonate, beta-alanine, beetroot juice, and caffeine might improve the adaptation to training
Jeffrey Rothschild and David Bishop
3 min read


Beta alanine supplementation
Beta-alanine has become a “must-have” supplement for many athletes, but does the science support the hype?
Bryan Saunders
4 min read
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