Re:Bodybuildings protein lifestyle, is there a cut off point?
Annsi Manninen did a review and found no link to high protein intake (almost any definition) and kidney damage in a healthy kidney.(this included stones which have a distinct pathology and risk profile(
There were links (and that is a long way from cause) in diseased kidneys. And as Rick notes if you have conditions that predispose you - then you have to keep close tabs.
However, the biggest problem encountered is the kidney function test used by the NHS, which uses a proxy marker to measure kidney function.
This proxy assumes a protein intake of approx 50-90g a day maybe a bit more and a sedentary lifestyle and so is completely useless if you had a heavy workout in the last 48 hours (possibly even 72 if it was a heavy enough), use creatine, or have a protein intake over 150g per day.
Many doctors incorrectly assume this is a problem, so before my annual health check I take a week off - I dont train, eat like a sedentary person - small portions, nice and healthy, and make sure all my supplements are clear too.
Unlike Rick, I will go up to 3g per lb of lean mass or more - however, it is the athletes responsibility to monitor their heallth.
as is I said least once a year I have a full blood panel, including BUN and Thyroid function done. And thats part of my annual health check on the NHS. For me this is a minimum, usually I get 6monthly checks done of my health, including my blood lipid profile, and have done for 15 years.
You have to take responsibility, if you are pushing yourself hard, eating to support brutal training, then you are an idiot if you are not also checking your health regularly, especially if you are also availing yourself of all the supplements that are available to bodybuilders.
Most bodybuilders I have met simply dont eat enough veg the truth be told!
Finally, in my experience, unlike Rick, most clinical dietitians I have met have a massive knowledge gap when it comes to sports nutrition, and some are downright useless (having had an experienced dietitian who wanted to work in sport tell me a bodybuilder only needs 55g protein a day and whey is pointless with no application for example).