title: Effect of chronic supplementation with methylsulfonylmethane on oxidative stress following acute exercise in untrained healthy men.
abstract: OBJECTIVE
  This study was conducted to assess the effects of chronic daily methylsulfonylmethane (MSM) supplementation on known markers of oxidative stress following acute bouts of exercise in untrained healthy young men.
  
  
  METHODS
  Eighteen untrained men volunteered for this study. Participants were randomized in a double-blind placebo-controlled fashion into two groups: MSM (n = 9) and placebo (n = 9). The participants took supplementation or placebo daily for 10 days before running. Participants ran 14 km. The MSM supplementation was prepared in water at 50 mg/kg body weight. The placebo group received water. Serum malondialdehyde (MDA), protein carbonyl (PC) and plasma oxidized glutathione (GSSG) were measured as markers of oxidative stress. The plasma-reduced glutathione (GSH) level and the GSH/GSSG ratio were determined as markers of plasma antioxidant capacity.
  
  
  RESULTS
  Acute exercise led to elevated levels of serum MDA, PC and plasma GSSG. MSM supplementation maintained PC, MDA and GSSG at lower levels after exercise than the placebo. The plasma level of GSH and the ratio of GSH/GSSG were significantly higher in the MSM supplemented group.
  
  
  CONCLUSIONS
  These results suggest that chronic daily oral supplementation of MSM has alleviating effects on known markers of oxidative stress following acute bouts of exercise in healthy young men.
authors: Department of Exercise Physiology, Ardabil Branch, Islamic Azad University, Ardabil, Iran.
authors: Babak
authors: B
authors: Nakhostin-Roohi
authors: Sarah
authors: S
authors: Barmaki
authors: Faegheh
authors: F
authors: Khoshkhahesh
authors: Shahab
authors: S
authors: Bohlooli
mesh_terms: D000328:Adult; D000975:Antioxidants / Q000378:metabolism / Q000494:pharmacology*; D019587:Dietary Supplements; D004121:Dimethyl Sulfoxide / Q000378:metabolism / Q000494:pharmacology*; D004311:Double-Blind Method; D015444:Exercise / Q000502:physiology*; D005978:Glutathione / Q000097:blood; D019803:Glutathione Disulfide / Q000097:blood; D006801:Humans; D008297:Male; D008315:Malondialdehyde / Q000097:blood; D018384:Oxidative Stress / Q000187:drug effects*; D050050:Protein Carbonylation / Q000187:drug effects; D012420:Running / Q000502:physiology*; D013450:Sulfones / Q000378:metabolism / Q000494:pharmacology*; D055815:Young Adult
chemical_list: D000975:Antioxidants; D013450:Sulfones; D008315:Malondialdehyde; C025910:dimethyl sulfone; D005978:Glutathione; D019803:Glutathione Disulfide; D004121:Dimethyl Sulfoxide