Muscular, right?: I work out and am fairly muscular and my creatinine is also 1.4. The "normal range" was determined for couch potatoes. The new fad for estimating GFR based on spot creatinine levels, with an adjustment for african-americans "because they are more muscular" is in my opinion subscience. If you are otherwise well and your urinalysis is normal, i'd keep doing what you're dong.
Answered 6/10/2014
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