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While fortification has helped reduce folate deficiency rates, vitamin B12 deficiency remains common because absorption challenges are often the primary issue rather than dietary intake alone

Some studies have shown no change in glutathione levels or measurements of oxidative stress despite ongoing glutathione supplementation [36]

Controlled studies have shown that acetaldehyde causes skin flushing, dizziness, increased heartbeat, nausea and headaches

Journal reference: Loo, S

Perhaps this indicates that in the early stages of ME/CFS, the immune system actively attempts to target the infectious burden (193)

doi: 10.3390/ijms20010203 117 AgarwalADurairajanayagamDHalabiJPengJVazquez-LevinM