Positives

• A prospective clinical study of women with ME/CFS found 2 months of multivitamin and mineral supplementation produced statistically significant increases in antioxidant enzymes and clinically significant decreases in severe fatigue, sleep disorders, and autonomic symptoms Inflammopharmacology.
  
  
• A 2024 randomized double-blind placebo-controlled trial found preventive multi-micronutrient supplementation during mild acute SARS-CoV-2 infection reduced post-acute COVID-19 condition symptoms vs placebo at follow-up Nutrients.
  
  
• Female-specific multivitamin formulations include iron (frequently deficient in pre-menopausal women due to menstruation), additional folate (relevant for childbearing-age patients), and sometimes calcium — appropriate when documented baseline labs support these additions RTHM.
  
  

Negatives

• Standard low-dose multivitamins have produced mixed results for established Long COVID symptoms; targeted high-dose interventions (e.g., specific high-dose B-vitamin or D protocols) outperform general multivitamin coverage when deficiencies are documented RTHM.
  
  

Hurdles & Side Effects

• Most drugstore multivitamins use synthetic folic acid and cyanocobalamin; specialists recommend products with methylfolate (5-MTHF) and methylcobalamin or hydroxocobalamin, particularly important for women with MTHFR variants who may have elevated miscarriage or neural-tube-defect risk on synthetic folate PMC.
  
  
• Iron-containing women’s multivitamins are unnecessary for postmenopausal women without documented iron deficiency, and excess iron is pro-oxidant; postmenopausal women should generally use iron-free formulations PMC.