Sperm Size & Shape Negatively Effected By Cannabis Use

If you’re like me, you want to take care of your little swimmers right? Sperm cells are the key to new life, so unless you don’t want children for whatever reason, it pays to look after them. It appears that smoking cannabis isn’t just bad for your lungs, brain and body odour, it’s also pretty bad for you sperm too!

A study conducted at the University of Sheffield found that young men who used cannabis may be reducing their fertility because of changes in sperm shape and size following cannabis use. This was the world’s largest study on this subject matter, it found that sperm size and shape was worse in summer months, but better after 6 days of abstinence from sexual activity. So it isn’t all on cannabis use, but there appears to be a significant relationship in reduced sperm counts (less than 4%), smaller sperm cells and shape if the adult had smoked cannabis within the 3 month period prior to producing the sperm sample.

It is of course nobodies business but yours what you do in your private life, but I never have, and NEVER will be smoking cannabis…it just isn’t worth the risk!



ScienceDaily, (2014). Sperm size, shape in young men affected by cannabis use. Retrieved 5th June, 2014, from http://www.sciencedaily.com/releases/2014/06/140604202946.htm

About the Author

Job Role Qualified Dietitian and Sports Nutritionist Qualifications BSc (Hons) Sports Science | BSc (Hons) Dietetics Tom has always participated in sport both recreationally and competitively which led to an unquenchable thirst for information on anything health, nutrition and fitness. After leaving school Tom went on to play for a football academy during which time he studied Sport and Exercise Science. From here he went on to study a BSc (Hons) Sport Science at UEA followed by his second BSc (Hons) degree, this time at the University of Hertfordshire studying Dietetics. Tom has worked in the fitness, educational and clinical nutrition industry starting out at David Lloyd Health and Leisure Clubs. He then went on to work as a Dietitian (RD) in the NHS, during which time he conducted clinics for healthy eating, weight loss and weight gain, as well as specialised consultations on Diabetes, IBS and Coeliac disease to name a few. He has vast amounts of experience at devising diet plans and supplement regimens, as well as working in the community with schools and competitive athletes. As Head Nutritionist and Supplement expert at Discount Supplements Tom is here to provide current and evidence based health and nutrition information to help you reach your health and fitness goals!
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