Sleep quality has a direct impact on many of the biomarkers we measure. When sleep is disrupted — whether short-term or chronically — it can trigger hormonal, metabolic, and immune changes that show up in your results.
Blood sugar & metabolism Sleep deprivation raises cortisol, which makes it harder for your body to regulate blood sugar. Over time, this can elevate Hemoglobin A1c (HbA1c) and disrupt insulin sensitivity, even in otherwise healthy individuals.
Heart health Poor sleep is linked to higher triglycerides and LDL ("bad" cholesterol) and lower HDL ("good" cholesterol). Since sleep is essential for lipid metabolism, ongoing disruptions can contribute to fat buildup in the bloodstream and increase cardiovascular risk.
Stress & inflammation Chronic sleep deprivation raises both cortisol and C-reactive protein (CRP), driving systemic inflammation. Elevated inflammatory markers are associated with heart disease, diabetes, and autoimmune conditions.
Immune function Sleep affects immune activity in different ways depending on how long the disruption lasts. Short-term sleep deprivation can cause a temporary spike in white blood cell (WBC) count — particularly neutrophils — due to the stress response. Chronic poor sleep tends to have the opposite effect, lowering WBC count and reducing lymphocytes, which weakens your immune defenses over time.
Liver & kidney function Sleep disturbances can stress the liver, potentially elevating ALT and AST — markers that may indicate inflammation or early liver dysfunction.
Hormonal balance Testosterone production peaks during deep sleep. Chronic sleep deprivation lowers testosterone levels, contributing to fatigue, reduced muscle mass, and decreased libido. Elevated cortisol from poor sleep further suppresses testosterone, compounding hormonal imbalances.
Vitamins & minerals Sleep deprivation can deplete key nutrients in several ways. Low magnesium is common, as poor sleep increases magnesium excretion, leading to muscle cramps, fatigue, and heightened stress sensitivity. Vitamin D deficiency is associated with poor sleep quality and can worsen fatigue and immune dysfunction. Ferritin levels may also be affected — iron deficiency is linked to restless leg syndrome (RLS) and disrupted sleep, while chronic inflammation from poor sleep can paradoxically raise ferritin, since it acts as an acute-phase reactant that increases in response to stress.
Keep in mind that many factors contribute to your biomarker levels — sleep is one piece of the picture. For personalized context, review your clinician note in the app or bring your questions to your next telehealth visit.