Intervention trial with calcium montmorillonite clay in a south Texas population exposed to aflatoxin

Brad H. Pollock, Sarah Elmore, Amelia Romoser, Lili Tang, Min su Kang, Kathy Xue, Marisa Rodriguez, Nicole A. Dierschke, Holly G Hayes, H. Andrew Hansen, Fernando Guerra, Jia Sheng Wang, Timothy Phillips

Research output: Contribution to journalArticlepeer-review

15 Scopus citations


South Texas currently has the highest incidence of hepatocellular carcinoma (HCC) in the United States, a disease that disproportionately affects Latino populations in the region. Aflatoxin B1 (AFB1) is a potent liver carcinogen that has been shown to be present in a variety of foods in the United States, including corn and corn products. Importantly, it is a dietary risk factor contributing to a higher incidence of HCC in populations frequently consuming AFB1-contaminated diets. In a randomised double-blind placebo controlled trial, we evaluated the effects of a 3-month administration of ACCS100 (refined calcium montmorillonite clay) on serum AFB1–lysine adduct (AFB-Lys) level and serum biochemistry in 234 healthy men and women residing in Bexar and Medina counties, Texas. Participants recruited from 2012 to 2014 received either a placebo, 1.5 g or 3 g ACCS100 each day for 3 months, and no treatment during the fourth month. Adverse event rates were similar across treatment groups and no significant differences were observed for serum biochemistry and haematology parameters. Differences in levels of AFB-Lys at 1, 3 and 4 months were compared between placebo and active treatment groups. Although serum AFB-Lys levels were decreased by month 3 for both treatment groups, the low dose was the only treatment that was significant (p = 0.0005). In conclusion, the observed effect in the low-dose treatment group suggests that the use of ACCS100 may be a viable strategy to reduce dietary AFB1 bioavailability during aflatoxin outbreaks and potentially in populations chronically exposed to this carcinogen.

Original languageEnglish (US)
Pages (from-to)1346-1354
Number of pages9
JournalFood Additives and Contaminants - Part A Chemistry, Analysis, Control, Exposure and Risk Assessment
Issue number8
StatePublished - Aug 2 2016


  • AFB–lysine adduct
  • Aflatoxin
  • biomarkers
  • calcium montmorillonite clay
  • clinical intervention trial
  • enterosorption

ASJC Scopus subject areas

  • Food Science
  • Chemistry(all)
  • Toxicology
  • Public Health, Environmental and Occupational Health
  • Health, Toxicology and Mutagenesis


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