…late form used in homocysteine remethylation. B12-dependent MTR is another part of that route.
Follow the pathway
Dr. Purser connects homocysteine with immune signaling, oxidative stress, and antioxidant defenses. He discusses C677T and A1…
…ce
Vitamin B12 is involved in the homocysteine pathway with MTR and MTRR. TCN2 helps carry B12. If you have tried a supplement, bring its exact form, such as methyl B12 or hydroxy B12, and note how you felt.
Putting the pieces together
The …
…teine to methionine, distinct from the folate/B12-dependent MTR route.
Putting the pieces together
This connects the discussion to choline and betaine metabolism. It is a useful example of why Dr. Purser looks at several pathways together: …
…nnection through the wider folate network, including MTHFR, MTR and nutrient status, rather than interpreting GGH as a direct homocysteine reading. Some medicines also interact with folate pathways and belong in the review.
A question to br…
…tes to production of the folate form used in remethylation; MTR and MTRR connect that process to B12. His course asks readers to consider the whole cluster rather than build a plan around C677T or A1298C alone.
Putting the pieces together
C…
…Keeping the remethylation system working
Dr. Purser teaches MTRR alongside MTR because the pathway depends on maintaining an active B12-dependent enzyme system, not simply consuming a nutrient once. MTR performs the homocysteine-to-methioni…
…lfuration toward cysteine-related chemistry. Folate/B12 and MTR/MTRR belong in the first discussion; CBS/CTH and glutathione-building materials belong in the second. MTHFR is an important piece, but not the entire map.
Putting the pieces to…
…ay itself.
Folate route
Helps recycle homocysteine
MTHFR · MTR · MTRR
Folate · B12 · B2
Folate and B12 connect to the route that recycles homocysteine back to methionine.
MTHFR helps produce 5-MTHF. MTR uses that folate-derived methyl grou…
…NP Homocysteine Panel (not just MTHFR C677T/A1298C—includes MTR, MTRR, CBS, PEMT, etc.). Most labs stop at two SNPs. I test 22 because real patients have compound defects. Intracellular Micronutrient Testing to catch functional folate, B12,…
…
Here are the major culprits:
1. MTHFR C677T & A1298C
2. MTR & MTRR
3. GGH
4. CBS (a tricky one—nobody likes this!)
Homozygous versions of these SNPs can shut down your methylation cycle, making it difficult for your body to manage ho…
…ent from rare variants that cause severe MTHFR deficiency.
MTR
Makes the methionine synthase enzyme, which uses vitamin B12 in the conversion of homocysteine to methionine.
Topics: homocysteine, MTHFR, C677T, A1298C, CBS, GGH, MTR, MTRR, …
…the same process. Dr. Purser discusses MTHFR alongside CBS, MTR, MTRR and SHMT1 because these genes participate in a broader metabolic network. A finding in one gene cannot tell you the activity of the entire network. Dr. Purser also introd…
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