Cliff Harvey PhD

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PhD Nutrition | Fellow CNA & AACN | SNA Board
🔬 Nutrition Researcher & Educator
🏋🏽‍♂️ Lifting heavy things | 🤼‍♂️ Catch-wrestling | Tiny trees 🌳
Founder of the Holistic Performance Institute 🍎
Opre Romani! 🛞 Cliff Harvey PhD, DipFit, DipNat
Clinician | Author | Researcher
Learn nutrition from Cliff: www.holisticperformance.institute
Find out more: www.cliffharvey.com

06/09/2026

Carnivore influencers: Plants will kill you!
Me: Show me the evidence... 🤷🏽‍♂️
Carnivore influencer: It's all been suppressed by BIG PLANT! 🤯🤣
It's weird that not once when I have conducted trials on Keto has someone from BIG PLANT tried to suppress my findings. 🤔

31/08/2026

What many people fundamentally miss about research is that we evaluate evidence by considering both epidemiological and trial data.
Observational data is temporally strong but lacks robust control. RCTs, on the other hand, are typically numerically and temporally weaker but with far less confounding.
Taken together, these give a good idea about whether something is likely to be true...
Such as: VEGETABLES ARE GOOD FOR US. 🙂

31/08/2026

Carnivore bros keep telling me I need to 'do my research' and 'check out the work of' Ken Berry and Anthony Chaffee...
Why? 🤣
Not to toot my own 🎺 but I've been in the Keto space waaay longer than most of the Keto and Carni influencers. 🤷🏽‍♂️

30/08/2026

Stupid s**t seen on the interwebz today:
"Plants are the cause of all disease in humanity". 🤦🏽‍♂️
If that were even remotely true.... If that were even remotely suspected... We would see some evidence for it.
We don't. 🤷🏽‍♂️

Por que no los dos? 😄
27/08/2026

Por que no los dos? 😄

20/08/2026

Carnivore expert: "We don't have the ability to break down fibre, therefore we should not be eating it".
Me (someone with an actual PhD in ketogenic diets): That's the exact reason we should eat fibre. 🤷🏽‍♂️

18/08/2026

Hard work and resilience matter, but they are not the strongest predictors of financial success.
Intergenerational capital transfers, parental socio-economic status, educational opportunity, & baseline income ceiling carry the strongest associations with wealth accumulation. Hard work yields wealth primarily when applied to scalable, high-margin opportunities... it doesn't exist in a vacuum.

12/08/2026

Keto-zealots: You need to do yOuR rEsEArCh! You should check out the work of [insert keto influencer here]
Me: MmmmK... 🤦🏽‍♂️
Context: I first tried the keto diet in 1996. I began using it personally and in practice from 1998 onwards. I have a PhD in ketosis and ketogenesis, have published highly cited papers on the topic, and co-authored a chapter in the Uni textbook on ketogenic diets. 😐
Don't mistake my lack of dogma for lack of knowledge. 🤷🏽‍♂️

10/08/2026

Claim: "The evidence supports an optimal human diet of 95% animal proteins and fats".
Fact: The evidence shows that humans are opportunistic omnivores and populations have thrived on widely varying ratios of plant:animal foods and carb:protein/fat ratios.
Also fact: No human population has ever been documented subsisting on a sustained, year-round diet of ≥95% animal-derived foods. 🤷🏽‍♂️

07/08/2026

It shouldn't be at all controversial to say that some people thrive on higher- and some on lower-carb diets. 🤷🏽‍♂️
Carb-Appropriate FTW! 💪🏽

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