pantothenic acid and l carnitine MARNYS L-carnitine + Vitamin B5 90 capsules Vital Edition, L-Carnitine XS 3000,

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Because the immune cells already use up so much energy in the body, and then struggle to produce energy in ME/CFS and long COVID, the authors proposed that immune problems in these diseases produce an energy sink that draws energy from other areas of the body

Potential risks: Excessive supplementation could potentially interfere with natural hormone balance or metabolic processes

10.1146/annurev-nutr-071816-064559 242 XuR.WuJ.LuoY.WangY.TianJ.TengW.et al (2022)

A lot more people ought to look at this and understand this side of your story