Could protein be a problem for aging and cancer?

Protein Intake – Effects on  Aging, Longevity and Cancer – Dr. Ron Rosedale
Could excessive protein in the diet be a problem for aging and cancer?

Here’s a very controversial presentation that I found fascinating. It’s Dr. Ron Rosedale’s presentation on the importance of protein restriction for health, recorded at the recent Low Carb Vail Conference.

This – should it be true – is just one of the reasons a proper low-carb diet should primarily be higher in fat, and contain only moderate amounts of protein. A low-carb, high-fat diet.

Obviously the body needs protein – it’s an essential nutrient – but there’s no need to eat more protein than necessary to feel and perform at our best.

Watch it

You can watch the full presentation on our member site:

Protein Intake – Effects on Aging, Longevity and Cancer – Dr. Ron Rosedale

Start your free membership trial to watch it instantly – as well as video courses, movies, interviews, more presentations, Q&A with experts, etc.

Also from Low Carb Vail 2016

The Food Revolution 2016 Update – with Dr. Andreas Eenfeldt
Seven Tips to Make Low Carb Simple – Dr. Rangan Chatterjee
LCHF and LDL – Dr. Sarah Hallberg
Low Carb Was the Only Thing That Helped – Interview with Benjamin Kuo
The Engineer Who Knows More Than Your Doctor – Interview with Ivor Cummins


  1. Leroy
    Sorry, but I believe that this is going to be another example of pseudoscience / junk science at its best.

    Protein is too important of a macronutrient to minimize. It is the ONLY macronutrient that repairs anything or builds anything. Fast don't. Carbs don't. They provide ENERGY... not growth.

    There are occupations that require levels of strength. Some very high levels of strength. Those individuals require larger muscles and large levels of muscular strength (protein). People who engage in resistance training need higher levels of protein. People who engage in cardio / aerobic training via HIT Interval training need more protein.

    Not protein at levels that bodybuilders, powerlifters, Olympic lifters, and other strength competitions need, but NOT minimal amounts.

    And I understand that a lot of Atkins users improperly (and incorrectly) emphasized protein while reducing the emphasis on fats. But swinging the pendulum in the other direction is equally wrong!

    For years the myth persisted that protein beyond the absurd RDA would severely damage the kidneys and lead to kidney damage (which was absolutely untrue)....while reading how FATS caused cancer - and numerous other problems (all untrue).

    Ron Rosedale is simply trying to reintroduce the leptin theory with this supposed decrease in protein (he really looks as if he could user some protein... And resistance exercise).

    I get tired of these articles that are nothing more than free publicity venues of an author... yes, Rosedale is promoting his published diet book: "The Rosedale Diet".

    How interesting.

    Rosedale's THEORY:

    ".....underlying cause is hormone (leptin) dysfunction. His is essentially just another low carb diet, only with more fat and less protein than other versions. His recommendations are ridiculously elaborate and are not supported by good evidence. His diet extrapolates from basic science, is based on speculative hypotheses, and has never been tested to see whether it works and is safe, much less whether it is superior to other diets.

    If this sounds vaguely familiar, it should. He is doing what so many proponents of fad diets have done in the past, and he does it poorly. His book is a puerile effort compared to Gary Taubes‘ "Good Calories, Bad Calories"; Taubes at least marshaled an impressive mass of scientific data, presented a cogent argument, and ultimately acknowledged that more studies would be needed to test his recommendations.... "

    "He says you are likely to be leptin resistant if you answer yes to any of the questions on his quiz.... Has this quiz been tested or validated? No. Is this a useful way to learn if you are leptin resistant? No. But it helps sell books...."

    Can't we do better than this?

    Replies: #2, #3
  2. bill

    I agree that Dr Rosedale looks emaciated.

    Who are you quoting?

  3. Dr. Andreas Eenfeldt, MD Team Diet Doctor
    It's quite possible that the nutrition needs for maximum bodybuilding do not equal the needs for maximum longevity. It's even possible that the nutrition needs for the best possible quality of life to not equal the needs for maximum longevity.

    I find this presentation fascinating. Does that mean I will minimize my protein intake? No. Too many downsides, so I'll keep it moderate and hope that some intermittent fasting will get me at least some of the potential benefits.

  4. peter white
    some people know it all and some people mislead us - all I need is the truth and someone who will filter this information so that people like me are on the right track
    Diet Doctor - we trust you so is this bloke right or wrong about protein
    If he is not quite correct - why do you have him on - is it for money - everything else seems to rotate around money
    Have a nice day
    Reply: #5
  5. Dr. Andreas Eenfeldt, MD Team Diet Doctor
    It's an interesting theory and it could be right. Whether it's the absolute truth or not – impossible to know for sure. To know we'd need decades-long randomized trials on humans. Hard or impossible to do and we could be dead before the results arrive.

    We have no financial interests in Rosedale's endeavors or whether or not his theory is correct.

  6. Drachula
    I think it is great to have different accounts and ideas on here. We can't know for definite what works best for an individual - it would take a trial of one!
    Logically, we should be careful of eating too much protein as excess just turns into sugar in any case. And the body can make most amino acids if it runs short, so we all probably eat too much protein, body-builders or not.
    Reply: #7
  7. bill
    Turning protein into sugar is a demand
    based process, not a supply based process:

  8. NY
    If protein is so "critical" how populations managed longevity on low protein intake? Also after a certain age, its not about growth anymore but maintenance. There is VERY little known about diet and its interaction with our body...I might sound cynic but I dont think it is possible to completely know what a healthy diet is because simply we just know too little about ourselves.

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