Every couple of years a new headline warns that the protein you eat is quietly hurting you. This year the target is your kidneys. Before that it was cancer, then your bones, then the claim that your body can only use twenty or thirty grams of protein at a meal. In this episode, Dr. Jordan Feigenbaum goes through the actual studies behind each scare: the kidney trials, the 2014 IGF-1 and cancer paper that started the panic, the acid-ash bone hypothesis, and the per-meal "cap." Each fear starts from a real mechanism, and each one was run straight to a frightening conclusion the clinical outcomes never supported.
The take home is simple. For a healthy adult, protein is not the lever people think it is, and where a real signal exists (processed and red meat, or a kidney that is already diseased) it tracks the whole dietary pattern more than the protein number. The two things that actually decide your health here are whether you eat mostly real food and whether you train.
Timestamps
00:00 The protein scare cycle
01:23 The four fears
01:59 Kidneys: healthy kidneys under higher protein
06:22 Kidney disease: does cutting protein help?
09:38 Red meat and the dietary pattern, not protein
12:00 Muscle, aging, and lifting on a restricted diet
13:54 Cancer: IGF-1 and the 2014 study everyone cites
16:22 The age reversal, and what travels with protein
18:48 Bigger data, processed meat, and the IGF-1 tell
22:15 Bones and the acid-ash myth
25:13 The 30-gram cap
27:17 What protein actually does, and how much you need
32:20 The two questions that matter
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Chan et al. PLoS One 2011. doi:10.1371/journal.pone.0020456
Berryman et al. Am J Clin Nutr 2018. doi:10.1093/ajcn/nqy088
Morton et al. Br J Sports Med 2018. doi:10.1136/bjsports-2017-097608
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