Urinary HealthMar 16, 2026
Somewhere between 20% and 30% of outpatient urine samples contain crystals. If your lab report flags crystalluria, the odds are strongly in favor of it being a normal, harmless finding. But a handful of crystal types, or crystals that keep showing up in large amounts, tell a genuinely important story about stone risk, infection, metabolic disease, or drug toxicity. The difference between "ignore it" and "investigate now" comes down to which crystals, how many, and how often.
A single urinalysis showing a few calcium oxalate crystals after a dehydrated morning is routine. Persistent hexagonal cystine crystals are a different situation entirely. Knowing the distinction matters more than most people realize.
Kidney HealthMar 16, 2026
Up to 95% of people with stage 3 chronic kidney disease (CKD) across multiple countries have never been told they have it. At the same time, among those with stage 3a specifically, the vast majority, especially those without significant protein in the urine, will never progress to kidney failure. That's the strange paradox of stage 3a CKD: it's simultaneously under-recognized and less dire than many people fear once they see the words "chronic kidney disease" on a lab report.
Stage 3a CKD means your kidneys are filtering blood at a moderately reduced rate, with an estimated glomerular filtration rate (eGFR) between 45 and 59 mL/min/1.73 m². That number has to persist for at least three months to count as CKD rather than a temporary dip. If your doctor just flagged this on your bloodwork, the single most important thing to understand is that your urine albumin level matters as much as, or more than, the eGFR number itself.
