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Originally Posted by
HeartDocMD
Actually, excessive protein intake can cause an elevated bun. So depending on how much protein he is taking in daily, that could be the underlying cause. However, bun aside from the notion of kidney problems is characteristic of various other things. Interestingly enough, the bun level is greatly increased when someone has had a recent myocardial infarct (heart attack). So potentially your doctor did the correct first step, in trying to cut out the excess protein you are probably ingesting daily. I assume, there will be a follow up blood test, and if the bun levels are still elevated other measures will have to be taken. I hope that clears it up a bit.