I thought that I was somewhat knowledgeable in health and nutrition
[DOI] [PMC free article] [PubMed] [Google Scholar] 6.Singh J., Wilkins G., Goodman-Vincent E., Chishti S., Bonilla Guerrero R., McFadden L., Zahavi Z., Santosh P
An RCT investigated the effect of 5 mg/d folic acid, the combination of 5 mg/d folic acid and 80 mg/d pyridoxin, and placebo for 3 months
Understanding your exact dosing in both milligrams and units helps here
In research environments, the following localized reactions are commonly observed and typically self-resolving: Small raised welt at the administration site Mild redness limited to the immediate area Temporary itchiness Slight firmness under the skin Resolution within several hours (occasionally up to 24 hours) These reactions generally: Remain localized Do not progressively worsen Do not spread significantly Do not produce systemic symptoms A transient, localized response does not automatically indicate product instability, impurity, or contamination, particularly when third-party purity verification has been performed