{"id":11005,"date":"2022-03-21T05:00:44","date_gmt":"2022-03-21T04:00:44","guid":{"rendered":"https:\/\/www.sciencefocus.com\/?p=114044"},"modified":"2022-03-21T05:27:11","modified_gmt":"2022-03-21T04:27:11","slug":"dr-michael-mosley-you-share-everything-with-your-partner-even-your-skin-microbiome","status":"publish","type":"rss_feed","link":"https:\/\/c01.purpledshub.com\/bbcsciencefocus\/rss_feed\/dr-michael-mosley-you-share-everything-with-your-partner-even-your-skin-microbiome\/","title":{"rendered":"Dr Michael Mosley: You share everything with your partner\u2026 even your skin microbiome"},"content":{"rendered":"

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By Michael Mosley\n \t\t<\/p>

Published: Monday, 21 March 2022 at 12:00 am<\/p>

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I have known my wife, Clare, since our first year at medical school, which was more than 40 years ago. Since then we have we have grown an almost telepathic understanding of each other\u2019s moods and thoughts. That might sound rather dull but it is actually a very bonding experience.<\/p>\n

This got me wondering about the extent to which we were also growing more alike in other ways. Take looks. There is a wealth of research which shows that long-term couples tend to look alike. But is this because they start off looking like each other, or is it that couples become more similar-looking over time? Perhaps because of shared diets, or lifestyles, or mannerisms, or some other factor?<\/p>\n

To find out, a team of researchers from Stanford University in the US put together a database of pictures of 517 couples, taken soon after getting married and then decades later. Using advanced facial recognition software and human judges, they showed that although long-term couples do tend to look alike<\/a>, they don\u2019t become more alike over time. In other words, this study supports the claim that we tend to choose partners who look like us.<\/p>\n

\u201cThis brings facial appearance in line with other traits \u2013 such as interests, personality, intelligence, attitudes, values and wellbeing \u2013 which show initial similarity but do not converge over time,\u201d they wrote.<\/p>\n

But though we may not grow more alike in appearance, over the years our skin microbiome<\/a> certainly does. In a study carried out a few years ago, which was published in the journal mSystems<\/em>, scientists decided to analyse the skin microbiomes of cohabiting couples and they found that living together significantly influences the microbial communities on each other\u2019s skin.<\/p>\n

To carry out the study, the researchers collected samples from numerous sites on the volunteers\u2019 bodies, including their upper eyelids, outer nostrils, inner nostrils, armpits, torso, back, navel, and palms of hands.<\/p>\n

The impact of living together on their microbial community was so strong that computer algorithms could identify cohabiting couples with 86 per cent accuracy based on their skin microbiomes alone<\/a>. The area of the body where cohabiting couples were the most alike, microbe-wise, was the feet. This is not altogether surprising as many of us will pad around our homes barefooted.<\/p>\n

Although the couples did show striking skin microbiome similarities, there were some areas of the body where the gender of the volunteer mattered more than whether they were cohabiting. For example, they discovered that the microbial communities growing on the inner thigh were more similar among people of the same biological sex than between cohabiting partners.<\/p>\n

And again, it turned out that their computer algorithms could differentiate between men and women with 100 per cent accuracy by analysing inner thigh samples alone. Who knew?<\/p>\n