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…
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…
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…
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…
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…
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…
Vitamin B2 (Riboflavin)
Some search terms matched…ake a form of folate the body uses. Your intake and current nutrient status may matter, but an MTHFR result does not prove a riboflavin deficiency or tell you a dose. Include any B-complex or multivitamin you already take when you review yo…
Vitamin B3 (Niacin)
Some search terms matched…P, which participate in cellular energy reactions.
Possible deficiency symptoms
Severe deficiency causes pellagra, which can involve skin, digestive and neurological symptoms.
How supplementation is approached
Identify whether the product c…
Vitamin C (Ascorbic Acid)
Some search terms matched…tioxidant activity and absorption of nonheme iron.
Possible deficiency symptoms
Severe deficiency can cause bleeding gums, easy bruising, poor wound healing and fatigue.
How supplementation is approached
Review vitamin C intake, the actual …
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…
Homocysteine and methylation
Some search terms matched…from what a single blood measurement proves. Review current nutrient status, clinical context and changes over time; do not assume that a common SNP means homocysteine cannot change. Lowering a marker is also not the same as demonstrating p…
Hirschsprung’s disease & genetics
Some search terms matched…. This developmental disorder is different from an acquired nutrient deficiency or a methylation result.
Bring these questions to your visit
Ask how the diagnosis has been confirmed and what specialist bowel care is needed. Genetic questio…
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