B12 + folate status (methylation / neuropathy risk) — London, England.

Confirmed via WebFetch to Wikipedia that Springer Nature -- global headquarters London, England -- publishes Nature Reviews Disease Primers, the exact journal this standard's own Green 2017 citation appeared in. No honesty-limit caveat needed: Springer Nature is the direct, confirmed publisher of the citation's own journal, not an inferred connection. Distinct from the existing Birmingham (that region's own CDC Diabetes Belt metformin-prevalence context) and Waltham (the Massachusetts Medical Society, this standard's second citation's own publisher, Stabler 2013 NEJM) tiles -- London is this standard's first citation's own confirmed journal publisher. Vitamin B12 and folate deficiency are common, frequently missed, and drive irreversible neurologic damage -- subacute combined degeneration of the spinal cord and peripheral neuropathy -- if the diagnosis is delayed.

Where

Accredited lab / clinic draw, London, England · Open the map

Pay

$300 proposed

This packet is not funded yet, so this figure is a proposed price and not money waiting in escrow. If a buyer funds it, approved proof settles that price onchain. If nobody funds it, approved proof earns provable credit toward the work instead of cash: recorded, and readable any time at vealth.net/labor/credit/(your wallet). You see which before you claim, never after.

Proof

Serum B12 + folate with reference ranges, MMA/homocysteine reflex captured for any borderline B12, compared against the deficiency/borderline/normal bands for flagging only

This is exactly what gets it approved. Nothing settles without it.

Level

intermediate

Open until

2027-01-06

Posted by

0x034F…6c89

The creator wallet. Its signature is what approves proof and settles the wage.

How this work is done

A documented method, so this packet comes out the same whoever does it.

Bring

• accredited-lab requisition (serum B12 + folate; MMA + homocysteine reflex if B12 is borderline)
• chain-of-custody label
• note on metformin/PPI/H2-blocker use, dietary pattern (vegan/vegetarian/omnivore), and any neurological symptoms

Steps

1. 1. Arrange a serum B12 + folate draw through an accredited lab; flag for reflex MMA and homocysteine testing if B12 falls in the 200-300 pg/mL borderline band.
2. 2. Record metformin use, chronic PPI/H2-blocker use, dietary pattern (vegan/vegetarian/omnivore), prior gastric/bariatric surgery, and any numbness, tingling, gait, or memory symptoms.
3. 3. Capture serum B12 (pg/mL) and folate (ng/mL) with reference ranges; if B12 is borderline (200-300 pg/mL), capture MMA and homocysteine (cross-reference the homocysteine_methylation standard) as confirmatory tests.
4. 4. Place B12 against the <200 deficient / 200-300 borderline / >300 unlikely-deficient bands and folate against the <2 deficient / 2-4 borderline / >4 normal bands, for flagging only.
5. 5. Attach the report(s); log both values, the risk-context notes, and the band; sign it.

What counts as done

• Serum B12 (pg/mL) and folate (ng/mL) from an accredited lab with reference ranges
• Metformin, chronic PPI/H2-blocker use, dietary pattern (vegan/vegetarian/omnivore), and any neurological symptoms recorded
• For a borderline B12 (200-300 pg/mL), MMA and homocysteine captured as confirmatory tests before any deficiency flag

Proof is measured against these, not judged by taste.