Low iron doesn’t always show up on basic labs, but the symptoms can take over your entire life. These are the low iron symptoms you shouldn’t ignore—the ones that make you exhausted, dizzy, short of breath, anxious, foggy, and unable to function normally. Mild iron deficiency can affect your energy, oxygen levels, heart, brain, and hormones long before you’re “technically” anemic. If you’re dealing with unexplained fatigue, hair shedding, cravings for ice, heavy periods, lightheadedness, or cons

Glomerular Filtration Rate (GFR) | Renal System

Glomerular Filtration Rate Explained | Kidney Function Tests

Estimating glomerular filtration rate (GFR)