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Books & reading guidesFrom the archive
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…ce a form of folate used in the processing of homocysteine. Common variants are different from rare variants that cause severe MTHFR deficiency. Topics: methionine, protein restriction, homocysteine, one-carbon metabolism, methylation, glu…

Books & reading guidesFrom the archive
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…ce a form of folate used in the processing of homocysteine. Common variants are different from rare variants that cause severe MTHFR deficiency. Topics: Skyrizi, risankizumab, IL-23, homocysteine, psoriasis, Crohn’s disease, ulcerative col…

Books & reading guidesFrom the archive
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…ce a form of folate used in the processing of homocysteine. Common variants are different from rare variants that cause severe MTHFR deficiency. Topics: IL-8, CXCL8, occult infection, persistent inflammation, homocysteine, cytokines

Books & reading guidesFrom the archive
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…ce a form of folate used in the processing of homocysteine. Common variants are different from rare variants that cause severe MTHFR deficiency. Topics: ulcerative colitis, Crohn’s disease, IBD, MTHFR, glutathione, probiotics, micronutrien…

YouTubeJan 5, 2026
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Dr. Purser covers common terminology and phrases on MTHFR and genetics. Learn how MTHFR may be affecting how you feel! Contact us at (801) 796-7667 or info@danpursermd.com for help. Check back often for the newest updates!

Gene referenceSep 23, 2026
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Makes an enzyme that helps break down catechol compounds, including some neurotransmitters. A common variant does not by itself explain mood, attention or stress tolerance.

Gene referenceSep 23, 2026
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G6PC2 encodes a glucose-6-phosphatase-related protein expressed in pancreatic islet cells. Common variation is associated with differences in fasting glucose regulation; it is not the insulin receptor.

Gene referenceSep 23, 2026
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HFE helps regulate iron absorption through signaling that influences hepcidin. The commonly discussed C282Y and H63D variants correspond to rs1800562 and rs1799945. Their implications depend on the combination present and clinical findings.

Gene referenceSep 23, 2026
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NAT2 encodes N-acetyltransferase 2, which helps process certain drugs and other compounds. Combinations of variants can influence acetylation status; one SNP usually does not tell the entire story.

Gene referenceSep 23, 2026
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F9 encodes coagulation factor IX. Disease-causing variants can result in hemophilia B, an inherited bleeding disorder, but a panel marker is not equivalent to a confirmed disease-causing finding.

Gene referenceSep 23, 2026
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IL1B encodes interleukin-1 beta, a cytokine involved in inflammatory responses and fever. Its production and activation are regulated processes, not simply an on/off consequence of having a common SNP.

Report teachingSep 16, 2026
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Explore rs2857261, rs1057972, natural killer cells, CD8+ T cells, and questions about high-expression variants.

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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.