@Peatslop-enjoyer said in What Vitamin B cofactors should I supplement?:
Could you provide the link? Thank you.
Vitamin B6: How much is too much? Which kind, with staples.
https://mirzoune-ciboulette.forumactif.org/t2033-english-corner-vit-b6-how-much-is-too-much#29628
Excerpt:
The English Corner – Vit B6: How much is too much?
Main ideas
Too much of a good thing is bad. Especially bad for neuro-sensitive people.
Vitamin B6 is well documented for its role as a modulator of steroid hormones.
No problem with food intake if not supplemented.
Maximum RDA target is 25 mg B6.
There are 6 vitamers and a way-out form through the urine.
If we want a pharmacological effect, we have to take into account the form of the vitamers.
The active form is B6 PLP.
Look at the 6 vitamers form before continuing (figure):
3 basic forms of vitamers B6:
PN= pyridoxine
PL = pyridoxal
PM = pyridoxamine
And their derivative, coupled with a phosphate molecule:
PNP = pyridoxine 5’-phosphate
PLP = Pyridoxal 5’-Phosphate (active form)
PMP = Pyridoxamine 5’-Phosphate
And the form used as a catabolite (excreted in the urine)
PA = 4-Pyridoxic acid.
A tight regulation of the PLP concentration is necessary in the cell: The aldehydes are toxic. A self -regulation and a protective mechanism coexist. But there is a radical side effect: PLP will no longer passes the encephalic barrier. A withdrawal effect will soon take place, with an impact on neurotransmitters.
PMP is a safer form: PMP is slightly increased in plasma, and rapidly converted into PLP and PL when needed.
An excess of pyridoxine (PN) is deleterious. No pyridoxine supplement advised: PN has an inhibition effect on PLP, the active form.
PL could be converted to PN by a PL reductase (side effects when too high supplementation).
PM could be more suitable for supplementation because of the very low formation of PN by PM.
If we suffer from a lack of enzymes, we must pay attention to the conversion pathway: PLP as a coenzyme factor has a pivotal role in catalysis of various enzymatic reactions.
See the roles of PNP-dependent enzymes, namely kinase and oxidase (+ phosphatase).
To be continued on the link. See above (my forum: Mirzoune et Ciboulette).
A tight regulation of the PLP concentration is necessary in the cell: The aldehydes are toxic.
We must not go beyond the absorption capacity of the body. We are not all equal. If you suffer from inflammation, if you need more antioxidants, you will probably burn more B6. What should be avoided is to approach the limit / the level of an overburdened of metabolism. A limit that will be different, depending on the individual.
Why does an excess of B6 or an inadequate enzymatic metabolism cause a problem of neuro-sensitivity? An excess of Pyridoxal (PLP) will lead to the inhibition of the enzyme PLK (Pyridoxal Kinase). PLK is set out of function via the “Salvage pathway” process. Details on the link, with references.
Useful link
*) English corner: B6 leads to decrease of cytokines in neuropathy
https://mirzoune-ciboulette.forumactif.org/t2041-english-corner-b6-leads-to-decrease-of-cytokines-in-neuropathy#29659
Efficacy of Vitamin B1, B6, and B12 in Peripheral Neuropathy
*) Useful nutrients in case of neuropathy
https://mirzoune-ciboulette.forumactif.org/t2031-haute-dose-de-b6-p5p-contre-algodystrophie-et-scc#29618
Mg bisglycinate, Zinc, Vit B6 PLP 20-25 mg, Vit C 500 mg, Vit D 5 000 UI (with K2).
*) English Corner: Anti-Stress & Neuro-Protective Effects of Thiamine (B1)
https://mirzoune-ciboulette.forumactif.org/t2045-english-corner-anti-stress-neuro-protective-effects-of-thiamine-b1
See part 2 (in the same post): How much and which kind of thiamine?
Excerpt from video of Dr. Allil OVERTON.
=> Practical example for beginner (patient N° 1): Basic protocol for thiamin insufficiency.
https://mirzoune-ciboulette.forumactif.org/t2045-english-corner-anti-stress-neuro-protective-effects-of-thiamine-b1#29716
With references.