THE PURSER WELLNESS ENCYCLOPEDIA

Let’s explore “Understanding a nutrient deficiency”

A RELATED COURSEGetting to know your micronutrients

5 chapters, at your pace

Explore the course
Explore all 3 matching courses

595 resources for your curiosity119 matching listings grouped; alternative sources stay available.

What’s searchable?
Nutrient referenceSep 23, 2026

Selenium

Some search terms matched

…t enzymes work, but a GPX variant does not prove a selenium deficiency. Review food, multivitamins, thyroid products and separate supplements together. Taking too much selenium can be harmful. How supplementation is approached Dr. Purser co…

Nutrient referenceSep 23, 2026

Taurine

Some search terms matched

…e or a laboratory finding is not automatically a standalone deficiency diagnosis. Assess overall protein intake, absorption and the clinical setting with a qualified clinician. Food sources Fish, shellfish, meat and dairy contain taurine; t…

Nutrient referenceSep 23, 2026

L-Threonine

Some search terms matched

…e or a laboratory finding is not automatically a standalone deficiency diagnosis. Assess overall protein intake, absorption and the clinical setting with a qualified clinician. Food sources Protein foods such as eggs, fish, poultry, meat, d…

Nutrient referenceSep 23, 2026

L-Tryptophan

Some search terms matched

…e or a laboratory finding is not automatically a standalone deficiency diagnosis. Assess overall protein intake, absorption and the clinical setting with a qualified clinician. Food sources Protein foods such as eggs, fish, poultry, meat, d…

Nutrient referenceSep 23, 2026

L-Tyrosine

Some search terms matched

…e or a laboratory finding is not automatically a standalone deficiency diagnosis. Assess overall protein intake, absorption and the clinical setting with a qualified clinician. Food sources Protein foods such as eggs, fish, poultry, meat, d…

Nutrient referenceSep 23, 2026

L-Valine

Some search terms matched

…e or a laboratory finding is not automatically a standalone deficiency diagnosis. Assess overall protein intake, absorption and the clinical setting with a qualified clinician. Food sources Protein foods such as eggs, fish, poultry, meat, d…

Nutrient referenceSep 23, 2026

Vitamin D

Some search terms matched

…bsorption and bone mineralization. Also called: Vitamin D A nutrient level and a receptor gene answer different questions Dr. Purser places vitamin D in immune, hormone and bone-related teaching. The conversion-genetics chapter includes VDR…

Search looks for your words in titles, descriptions, available articles, learning guides, and video captions when available. The closest matches appear first. Duplicate posts are grouped, with links to other places you can read or watch them. Books, chapters, and reports have topic guides here; the original files and full book text are not available in this encyclopedia. Subscriber posts include a title and public summary; open Substack to read the full post.