THE PURSER WELLNESS ENCYCLOPEDIA

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Nutrient referenceSep 23, 2026

Glycine

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…sult independently. What symptoms can—and cannot—tell you A low intake or a laboratory finding is not automatically a standalone deficiency diagnosis. Assess overall protein intake, absorption and the clinical setting with a qualified clini…

Nutrient referenceSep 23, 2026

Histidine

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…n history together. What symptoms can—and cannot—tell you A low intake or a laboratory finding is not automatically a standalone deficiency diagnosis. Assess overall protein intake, absorption and the clinical setting with a qualified clini…

Nutrient referenceSep 23, 2026

Iodine

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…eded to make thyroid hormones. Possible deficiency symptoms Low intake can contribute to an enlarged thyroid and impaired thyroid hormone production. Symptoms are not specific. How supplementation is approached Review iodine intake together…

Nutrient referenceSep 23, 2026

Iron

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…han replacing those measurements. The plan must distinguish low intake or deficiency from overload concerns. How supplementation is approached Dr. Purser treats iron as a finding requiring laboratory and clinical context, not a general fati…

Nutrient referenceSep 23, 2026

Isoleucine

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…mino-acid strategy. What symptoms can—and cannot—tell you A low intake or a laboratory finding is not automatically a standalone deficiency diagnosis. Assess overall protein intake, absorption and the clinical setting with a qualified clini…

Nutrient referenceSep 23, 2026

Leucine

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…mino-acid strategy. What symptoms can—and cannot—tell you A low intake or a laboratory finding is not automatically a standalone deficiency diagnosis. Assess overall protein intake, absorption and the clinical setting with a qualified clini…

Nutrient referenceSep 23, 2026

Lithium

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…approached Lithium is different from an ordinary vitamin. A low-dose supplement is not the same as prescription lithium. If you are considering either form, talk with the clinician who manages your medicines and kidney or thyroid health. Wh…

Nutrient referenceSep 23, 2026

L-Lysine

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…mino-acid strategy. What symptoms can—and cannot—tell you A low intake or a laboratory finding is not automatically a standalone deficiency diagnosis. Assess overall protein intake, absorption and the clinical setting with a qualified clini…

Nutrient referenceSep 23, 2026

L-Methionine

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…bout protein intake and absorption while examining high and low homocysteine. That is a reason to assess the overall diet, not to assume protein restriction will improve health or that a low homocysteine result proves methionine deficiency.…

Nutrient referenceSep 23, 2026

L-Phenylalanine

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…mino-acid strategy. What symptoms can—and cannot—tell you A low intake or a laboratory finding is not automatically a standalone deficiency diagnosis. Assess overall protein intake, absorption and the clinical setting with a qualified clini…

Nutrient referenceSep 23, 2026

Potassium

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…naling and muscle contraction. Possible deficiency symptoms Low blood potassium can cause weakness, constipation or abnormal heart rhythms. Medicines and fluid losses are common considerations. How supplementation is approached Potassium co…

Nutrient referenceSep 23, 2026

L-Serine

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… an actual nutrient finding fits the rest of the pattern. A low laboratory response or a gene variant does not by itself prove that an entire pathway has shut down. Protein intake, absorption, current findings and clinical interpretation sh…

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