Clinical Performance Nutritionist | CEO @MacNutrition | Founder of Mac-Nutrition Uni (@MNUcert) | Nutrition just makes me tick!

Joined June 2010
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Man am I starting to get excited! We have officially started filming content for our biggest project of 2025!!! The Female Nutrition and Health Certification (in association with @MacNutrition Uni). #Menopause #Perimenopause
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Martin MacDonald retweeted
16 Apr 2025
After 21 years at my dream job, I’m very sad to announce my early retirement from the National Institutes of Health. My life’s work has been to scientifically study how our food environment affects what we eat, and how what we eat affects our physiology. Lately, I’ve focused on unravelling the reasons why diets high in ultra-processed food are linked to epidemic proportions of chronic diseases such as diabetes and obesity. Our research leads the world on this topic. Given recent bipartisan goals to prevent diet-related chronic diseases, and new agency leadership professing to prioritize scientific investigation of ultra-processed foods, I had hoped to expand our research program with ambitious plans to more rapidly and efficiently determine how our food is likely making Americans chronically sick. Unfortunately, recent events have made me question whether NIH continues to be a place where I can freely conduct unbiased science. Specifically, I experienced censorship in the reporting of our research because of agency concerns that it did not appear to fully support preconceived narratives of my agency’s leadership about ultra-processed food addiction. I was hoping this was an aberration. So, weeks ago I wrote to my agency’s leadership expressing my concerns and requested time to discuss these issues, but I never received a response. Without any reassurance there wouldn’t be continued censorship or meddling in our research, I felt compelled to accept early retirement to preserve health insurance for my family. (Resigning later in protest of any future meddling or censorship would result in losing that benefit.) Due to very tight deadlines to make this decision, I don’t yet have plans for my future career. The NIH has been a wonderful place because it allows scientists to take risks, form unique collaborations, and do studies difficult to conduct elsewhere. I’m proud of what we’ve accomplished and I’m fortunate to have had such wonderful colleagues and scientific collaborators. I hope to someday return to government service and lead a research program that will continue to provide gold-standard science to make Americans healthy.
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I mean, yes you'll be way less hungry. Yes you'll reduce body fat at 2-3 times the rate. Yes you'll retain muscle. But…
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In case it wasn’t obvious…
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Whoever runs the Mac-Nutrition Uni TT account needs a pay rise... Harsh or Not Harsh Enough? #arbonne #mlm #MacNutritionUni
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This isn't my opinion. Please don’t deny science for tradition and put your child at risk. If you want to hear more about the research in this area I recommend listening to episodes 21 & 22 of my podcast. ⠀ I specifically delve into the contentious topic of Sugar Addiction too
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What’s also interesting is… ⠀ Even the ANTICIPATION of depriving yourself of chocolate for instance, can trigger overeating. ⠀ Making these decisions for yourself is one thing (that I would still recommend against mostly).
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But making them/imposing them/even introducing them to kids is a whole other ball game. ⠀ Be careful. Much Love ❤️
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Agg. Diet Myth: “Slow & Steady Wins the Race” #CalorieDeficit
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How many times have you been told that small, sustainable changes are the best way to lose weight? And that rapid fat loss isn't good? The best available scientific evidence does NOT support this. I'd love to hear anyone disagree with this who can actually cite a reference ❤️
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Is Protein Making us Fat? Dim Nectar is at it again.
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Anyway, Dim does say SOME correct stuff that echos things I’ve been saying for years. Remember when people were calling me the ‘legume guy’? Yeah, we should definitely be focussing more on fibre, that’s a no brainer. (7/8)
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Just because he says SOME correct things, doesn’t mean he shouldn’t be called out on his BS & so I will keep doing it. Especially the Zoe stuff where the misinformation is clearly motivated by money. (8/8)
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People like the Glucose Gimpess (Tim Spector) DO say some things that are correct. A broken Clock is also right twice a day. (1/6)
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I can’t believe I’m saying this but no, a fruit smoothie (that she says is NOT APPROVED) is NOT the same as eating a bag of Haribo. This woman wants to push her supplements. (5/6)
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She should not be celebrated… & no she is in NO WAY evidence-based. I have gone through the references on her website & they do NOT support what she is saying. Shock. (6/6)
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