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Reply With QuoteI may be wrong here, but I'm under the impression the jist of the theory is to do with acid-base balance. High protein diets, especially diets high in sulphur containing AA's, are particularly acid forming. If the plasma becomes to acidic, osteoclastic activity increases releasing alkaline calcium and postassium salts thus buffering the rise in H+ ions. The calcium/pottassium salts get excreted via the intestinal tract or in the urine.
However, the body's inbuilt regulatory mechanisms to keep plasma Ph in check are extremely efficient. If phosphorous intake is adequate and the glomerular filtration rate in the kidneys is not inhibited then there should be no reason (aside from some pathologies) for bone loss to a problem under a high protein diet.
I mean I haven't looked at any studies on this, but with my understanding of the acid-base balance in the body, I just can't see why bone loss would be increased. Considering that calcium is a minor buffering mechanism, and only kicks in during a low grade chronic acidosis.
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High protein diets and calcium leaching
#1 18-11-2009 07:59 PMMP Veteran
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still doing my course here, im looking for some information on the effects of high protein diets and calcium leaching from bones.
I understand the basic mechanism but I am unconvinced that it is an issue especially if dairy makes up any part of the diet.
Anyone know any good articles or papers worth reading on the subject?
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#2 18-11-2009 08:51 PMMP L337
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Using this code with your first order will make you a ripped machine. Use with the up most of care!MP2484*may or may not make you a ripped machine...infact it most certainly wont.
Disclaimer: All posts on these forums are for information and discussion purposes only and solely the views of the forum member who posted. No posts constitute or replace medical advice. Any information should be considered in regard to specific circumstances. All advice is followed at your own risk and should be followed up with your own research or doctors advice.
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#3 18-11-2009 09:04 PMMP L337
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jn.nutrition.org/cgi/reprint/118/6/657.pdf
good paper.Using this code with your first order will make you a ripped machine. Use with the up most of care!MP2484*may or may not make you a ripped machine...infact it most certainly wont.
Disclaimer: All posts on these forums are for information and discussion purposes only and solely the views of the forum member who posted. No posts constitute or replace medical advice. Any information should be considered in regard to specific circumstances. All advice is followed at your own risk and should be followed up with your own research or doctors advice.
sendos is a Supplements & Training and Diet Moderator. -
#4 18-11-2009 09:19 PM
Yes, this has been covered extensively in another thread on the forum. It is bunkum - as usual. A case of taking a reasonably scientifically sound general principle and stretching it - unreasonably - to create a fabricated dietary scare story. Acid/alkaline balance is a non issue, really, as even breathing a little harder/faster is a principal mechanism for normalising pH - no need for massive amounts of calcium leeching! Often - with bone health issues - the problem relates to vitamin D (required for proper uptake of calcium into the bones) not a deficiency in calcium itself or an excessive loss of it due to a high protein diet. Most of the scientific literature points to the opposite - much better bone health and calcium status on a higher protein diet.
Disclaimer: All posts on these forums are for information and discussion purposes only and solely the views of the forum member who posted. No posts constitute or replace medical advice. Any information should be considered in regard to specific circumstances. All advice is followed at your own risk and should be followed up with your own research or doctors advice.
NU_nutrition_TS is a Training and Diet Moderator. -
#5 18-11-2009 09:24 PMMP12119 = 5% Off
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Wow Nu! I never thought I'd hear you advocate a high (well by layman standards) protein intake!
"Rather than worrying about insulin, you should worry about whatever diet works the best for you in regards to satiety and sustainability." -
#6 18-11-2009 09:28 PM
Well I did say 'higher' (as in higher than advocated by the conventional wisdom)! I'm not against a high protein intake per se - just protein as a majority macronutrient. That's not because it may be unhealthy but because it is largely unnecessary, expensive and wasteful.
Disclaimer: All posts on these forums are for information and discussion purposes only and solely the views of the forum member who posted. No posts constitute or replace medical advice. Any information should be considered in regard to specific circumstances. All advice is followed at your own risk and should be followed up with your own research or doctors advice.
NU_nutrition_TS is a Training and Diet Moderator. -
#7 18-11-2009 09:55 PMMP Veteran
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Cheers fellas i was quite sure it was rubbish but just lacked some good reading
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#8 18-11-2009 10:02 PMMP Veteran
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since starting the thread i did actually find this just incase anyones interested:
High-Protein Weight Loss Diets and Purported Adverse Effects: Where is the Evidence?My Beginners Guide -
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