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…
L-Serine
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…
Shiitake
Some search terms matched…APA result. A cell-response finding is not a diagnosis of a deficiency in this botanical or compound.
Shiitake mushrooms used as food differ from concentrated mushroom extracts.
What symptoms can—and cannot—tell you
There is no established…
Strontium
Some search terms matched…oms can—and cannot—tell you
There is no established dietary deficiency syndrome for this specific botanical or compound. Symptoms are not evidence that you need this supplement.
Food sources
Trace amounts occur in foods and water; there is …
Sulforaphane
Some search terms matched…APA result. A cell-response finding is not a diagnosis of a deficiency in this botanical or compound.
Broccoli-derived preparations may supply sulforaphane or its precursor glucoraphanin, sometimes with myrosinase. These labels are not int…
Superoxide Dismutase (SOD)
Some search terms matched…oms can—and cannot—tell you
There is no established dietary deficiency syndrome for this specific botanical or compound. Symptoms are not evidence that you need this supplement.
Food sources
The body makes SOD enzymes. Eating a food contain…
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…
Turmeric
Some search terms matched…APA result. A cell-response finding is not a diagnosis of a deficiency in this botanical or compound.
Turmeric as a spice differs from concentrated curcumin extracts, especially formulas with absorption-enhancing ingredients.
What symptoms…
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…
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