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If you have trouble with nutrient absorption due to the presence of intestinal inflammation, poor gut health, or a deficiency of those intrinsic factors we mentioned, then taking an oral supplement may not be that helpful
J Inherit Metab Dis 43:348356
This gradual repair of cellular energy production can help alleviate the crushing, leaden fatigue that characterizes ME/CFS and Long COVID, providing a more stable foundation for daily stamina
Diabetes 58 , 15091517 (2009)
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