Fathers 'need to think about diet just as much as mothers'

Sarah Kimmins says their findings suggest that fathers need to think about what they eat, smoke and drink just as much as mothers do, as their lifestyle choices could impact future generations. And she notes that although folate is added to many foods, fathers who have diets that are high in fat or who are obese may be unable to metabolize folate in the same way as those who have sufficient levels of the vitamin. "People who live in the Canadian North or in other parts of the world where there is food ins ecurity may also be particularly at risk for folate deficiency. And we now know that this information will be passed on from the father to the embryo with consequences that may be quite serious." The researchers say that the next steps from this research will be to collaborate with professionals at a fertility clinic in order to further investigate how a man's diet and weight could impact their child's health. Last year, Medical News Today reported on a study suggesting that a father's occupation may be linked to the risk of birth defects in their infants. Written by Honor Whiteman

Frequently Asked Questions

Does a father's diet really affect fertility and baby health?

Yes, research suggests that a father's diet can have a significant impact on both fertility and the health of future children. Studies show that what men eat, drink, and smoke can affect sperm quality and potentially pass on health consequences to the embryo. The NHS recommends that men trying to conceive should maintain a healthy, balanced diet alongside their partners.

Why is folate important for male fertility?

Folate plays a crucial role in sperm development and DNA integrity. Research indicates that men who are overweight or have high-fat diets may struggle to metabolise folate properly, which could affect their fertility. While folate is added to many foods, men who are TTC should consider their overall nutritional intake to ensure adequate levels.

Should men take fertility supplements when trying to conceive?

Many fertility specialists recommend that men take supplements containing key nutrients such as zinc, CoQ10, and L-carnitine to support sperm health and motility. The HFEA acknowledges that lifestyle factors, including nutrition, can affect male fertility. If you're struggling to conceive, it's worth speaking to your GP about whether supplements might help.

Can being overweight affect a man's chances of becoming a father?

Yes, research shows that obesity in men can negatively impact fertility by affecting hormone levels, sperm quality, and the ability to metabolise important nutrients like folate. The NHS advises that maintaining a healthy weight can improve your chances of conception. With 1 in 7 UK couples experiencing fertility issues, addressing weight is one factor within your control.

What lifestyle changes should men make before trying for a baby?

Men should focus on eating a balanced diet rich in vitamins and minerals, maintaining a healthy weight, reducing alcohol intake, and stopping smoking. NICE guidelines recommend that both partners make positive lifestyle changes when trying to conceive. These changes can take around three months to positively affect sperm quality, so it's best to start early.

Will the NHS test male fertility if we're struggling to conceive?

Yes, if you've been trying to conceive for 12 months without success, your GP can refer you for fertility investigations, which typically include a semen analysis for the male partner. NHS fertility testing is available, though waiting times can vary depending on your local CCG or Integrated Care Board. Early investigation of male factors is important, as male fertility issues contribute to around half of all cases.

How long before trying to conceive should a man improve his diet?

Men should ideally start improving their diet and lifestyle at least three months before trying to conceive, as this is roughly how long it takes for new sperm to develop. Making changes to nutrition, weight, and habits during this time can help optimise sperm health. Speaking to your GP or a fertility specialist can provide personalised guidance based on your circumstances.