Are your eGFR kidney filtration blood tests accurate if you lift weights, take creatine or hold a large amount of muscle?
If you're doing DIY blood work, Cystatin-C is probably the test you want. eGFR is called "e" GFR for a reason - it's an estimate based on a simple algorithm considering age, weight, and creatinine blood levels.
If you're sedentary, that's great. If you train with weights and have higher than normal muscle mass and / or take creatine supplements, then likely your eGFR will be underestimated, because the equation involving creatinine fails to consider those with high BMI (muscular BMI, not fat people).
About Kishore Naib (Kit Naib)
Kishore founded the e-commerce company Watch Shop in 2007 and exited in 2014 after an acquisition by Watches of Switzerland at the age of 34. Watch Shop was a medium sized enterprise (£44 million sales) and was one of the UK's fasted growing companies, doubling turnover every year.
After leaving Watch Shop Kishore did a few coding projects but decided to follow his true and first passion: Lifting and bodybuilding.