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GidMK's profile
Health Nerd
Health Nerd
Health Nerd
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@GidMK

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Health NerdVerified account

@GidMK

Epidemiologist. Writer (Guardian, Observer etc). "Well known research trouble-maker". PhDing at @UoW Host of @senscipod Email gidmk.healthnerd@gmail.com he/him

Sydney, New South Wales
theguardian.com/profile/gideon…
Joined November 2015

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    1. Health Nerd‏Verified account @GidMK 16 Jan 2020

      (Telomeres are part of our DNA that stop it from breaking when it replicates. You have less of them as you grow older, which some people think is part of the reason that we get less healthy as we age)pic.twitter.com/6iLjGFhzIh

      1 reply 0 retweets 2 likes
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    2. Health Nerd‏Verified account @GidMK 16 Jan 2020

      FIRST PROBLEM: telomeres are NOT age. They are ASSOCIATED with age In other words, you can't predict much from shorter telomeres. It might just be that they get shorter as we age naturally, rather than causing our aging processes per sepic.twitter.com/9gn5y4Zy1e

      1 reply 0 retweets 5 likes
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    3. Health Nerd‏Verified account @GidMK 16 Jan 2020

      So making any claims about adding years to your life from this research is baldly wrong. The study made some weird extrapolations from shortened telomeres to 4.5 years of aging, but that's not very realistic

      1 reply 0 retweets 3 likes
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    4. Health Nerd‏Verified account @GidMK 16 Jan 2020

      SECOND PROBLEM: The analysis was cross-sectional Basically, the researcher (yes just one) took a sample of people at one point in time and looked at whether full-fat milk was associated with telomere issues

      1 reply 0 retweets 3 likes
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    5. Health Nerd‏Verified account @GidMK 16 Jan 2020

      This is a problem, because we haven't measured people over time All we can say is that, in the NHANES sample from 1999-2002, people with shorter telomeres drank more full fat milkpic.twitter.com/p5ZowpcOoI

      1 reply 0 retweets 4 likes
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    6. Health Nerd‏Verified account @GidMK 16 Jan 2020

      Which brings us to the THIRD PROBLEM: this study was observational in nature All the analysis did was look at the association between full/low fat milks and telomere length

      1 reply 0 retweets 3 likes
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    7. Health Nerd‏Verified account @GidMK 16 Jan 2020

      The study didn't even control for many covariates. It's not hard to see how your telomere length (a complex measure of DNA) could be influenced by things that this study failed to control for

      4 replies 0 retweets 3 likes
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    8. Health Nerd‏Verified account @GidMK 16 Jan 2020

      For example, it might be that people with sick parents are more likely to drink full fat milk. Having sick parents is associated with telomere issues, so instead of the milk it's the sick parents' fault

      2 replies 0 retweets 1 like
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    9. Health Nerd‏Verified account @GidMK 16 Jan 2020

      Also, the main analysis treated fat % in milk as a linear variable? That's just total nonsense, you can't buy milk (in most places) that has 2.35% fat

      1 reply 0 retweets 5 likes
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    10. Health Nerd‏Verified account @GidMK 16 Jan 2020

      For this study to be correct, people would have to be homogenizing their own milk which is...unlikely

      1 reply 0 retweets 2 likes
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      Health Nerd‏Verified account @GidMK 16 Jan 2020

      Anyway, there are more problems but I think that's enough for now You can't really take much away from this study except that adults in 2000 who drank full fat milk might've had slightly shorter telomerespic.twitter.com/LSREjADsty

      1:53 PM - 16 Jan 2020
      1 reply 0 retweets 0 likes
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        2. Health Nerd‏Verified account @GidMK 16 Jan 2020

          TL:DR - drinking skimmed milk can't "add 4.5 years to your life" - the study had nothing to do with age - probably not causal - DRINK WHATEVER MILK YOU WANT

          1 reply 3 retweets 16 likes
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        3. Health Nerd‏Verified account @GidMK 16 Jan 2020

          Health Nerd Retweeted Health Nerd

          Oh, forgot to mention that if this regression was accurate you'd expect that people who eat cheese, which has a very high percentage of milk fat, would have basically no telomereshttps://twitter.com/GidMK/status/1217927165884321792?s=20 …

          Health Nerd added,

          Health NerdVerified account @GidMK
          Also, the main analysis treated fat % in milk as a linear variable? That's just total nonsense, you can't buy milk (in most places) that has 2.35% fat
          Show this thread
          0 replies 1 retweet 10 likes
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