THE PURSER WELLNESS LIBRARY

Let’s explore Blood urea nitrogen — lab reference

A COURSE FOR YOUR CURIOSITYBlood sugar & daily energy

4 chapters, at your pace

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559 discoveries for your curiosity28 matching listings grouped; alternative sources stay available.

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Health BlogMar 13, 2026

The Hidden Molecule Driving Inflammation: Understanding the Purser Model of Homocysteine

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Most people have never heard of homocysteine , yet this small molecule may hold the key to understanding inflammation, cardiovascular disease, neurological problems, and many chronic conditions. For decades, homocysteine was viewed as a toxic substance in the blood. Doctors were taught that lowering it with B-vitamins might reduce heart disease risk. But research results were inconsistent, leaving many physicians unsure whether homocysteine truly mattered. New research and clinical observations are changing that view. We introduce a new framework called the Purser Model , which explains why ho

Gene referenceSep 23, 2026

FOLR1

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FOLR1 encodes folate receptor alpha, which helps cells take up folate and has an important role in folate transport at the brain’s barriers. Blood folate and folate availability in the nervous system are not identical measurements.

Gene referenceSep 23, 2026

KIT

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KIT encodes a receptor tyrosine kinase that responds to stem cell factor. It participates in blood-cell development and mast-cell biology, making the exact variant and testing context especially important.

Gene referenceSep 23, 2026

NOS3

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NOS3 encodes endothelial nitric oxide synthase, which helps blood vessels generate nitric oxide, a signal involved in vascular relaxation. This pathway is distinct from a blood pressure measurement or a diagnosis of vascular disease.

Gene referenceSep 23, 2026

VDR

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VDR encodes the vitamin D receptor, which helps regulate gene activity in response to active vitamin D. A receptor variant does not by itself mean receptors are absent or that the blood vitamin D level is low.

Gene referenceSep 23, 2026

IL6R

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IL6R encodes the interleukin-6 receptor. Membrane-bound and soluble receptor pathways help explain why IL-6 biology involves more than the amount of cytokine in a single blood sample.

YouTubeSep 16, 2026

Wild genetic facts I learned this week that could actually be deadly

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…urodedevelopmental conditions due to reduced SAM um and availability of neurotransmitter synthesis. So, um, so I saw a patient with Tourette's and they had this. I'm like, there may be a way around it even though she's a little older. Um, I…

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YouTubeSep 16, 2026

Wild genetic facts I learned this week that could actually be deadly

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…urodedevelopmental conditions due to reduced SAM um and availability of neurotransmitter synthesis. So, um, so I saw a patient with Tourette's and they had this. I'm like, there may be a way around it even though she's a little older. Um, I…

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Health BlogJun 11, 2026

Using the NCC Formula

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This is the BEST way to look at what your Copper is really doing. Is it getting into the cells, or building up in other places? Let’s see! Non-Ceruloplasmin Copper Calculator Calculate NCC in Seconds Enter zinc, copper, and ceruloplasmin exactly as they appear on a lab report. The calculator converts units, calculates the copper:zinc ratio, and highlights the percent of non-ceruloplasmin-bound copper. Lab Inputs Use the unit dropdowns to match the lab report. The app normalizes everything to µg/dL before calculating. Zinc Required for copper:zinc ratio Total Copper Required for all NCC calcula

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