Vitamin D in sport

Explore our lecture series on “Vitamin D in sport: Hype, evidence, and practical guidance” with Professor Graeme Close and Dr Daniel Owens. Across this series, the speakers unpack the latest science on vitamin D in sport, examining its role in muscle function, immunity, bone health, and performance, while also addressing the challenges of assessment, interpretation, and safe supplementation in practice. Designed for practitioners who want clarity rather than confusion, the series translates complex evidence into practical guidance for athlete support.

What we will cover:

What does the evidence really say about vitamin D and athletic performance?

How does vitamin D influence muscle function, immunity, and bone health?

What are the common pitfalls when assessing vitamin D status?

Which blood biomarkers are most useful, and how should they be interpreted?

When should athletes be tested and what are the target ranges between athletes?

Professor Graeme Close

Graeme Close is a Professor of Human Physiology at Liverpool John Moores University where he is the programme leaders for the MSc in Sport Nutrition. Graeme is also nutrition consultant to England Rugby, Everton FC and Nottingham Forest. Graeme is the Head of Performance Nutrition to the European Tour Gold, the Lawn Tennis Association and several world class athletes.

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Dr Dan Owens

Daniel Owens is a reader in cellular and molecular exercise physiology, with research skills spanning in vitro models of muscle to human in vivo randomised controlled trials and advanced omics techniques.. Daniel is also an applied sport nutritionist with SENR academic associate status and has provided nutrition support for athletes in professional football, rugby, triathlon and formula 1.

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Vitamin D in sport: Hype, evidence, and practical guidance

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Professor Graeme Close

Dr Dan Owens