Shelby Houlihan, the American record holder in the 1,500 and 5,000 meters, posted on social media that she's been banned for four years following a positive test for what she concluded was a tainted pork burrito.

Houlihan's announcement on her Instagram account Monday arrives days before the start of U.S. Olympic track and field trials in Eugene, Oregon, where the top three in each event earn a spot to the postponed Tokyo Games. She finished 11th at the 2016 Rio de Janeiro Olympics in the 5,000 meters.

The 28-year-old Houlihan said she received an email from the Athletics Integrity Unit (AIU) on Jan. 14, notifying her that a drug testing sample returned a finding for the anabolic steroid nandrolone. She said she's since learned it has "long been understood by WADA (World Anti-Doping Agency) that eating pork can lead to a false positive for nandrolone, since certain types of pigs produce it naturally in high amounts. Pig organ meat (offal) has the highest levels of nandrolone."

More in category

Simone Biles withdraws from two more Olympic events
July 30, 2021CBS
Simone Biles withdraws from two more Olympic events
DOJ sues Texas over plan to stop vehicles transporting migrants
July 30, 2021CBS
DOJ sues Texas over plan to stop vehicles transporting migrants
Lollapalooza sparks COVID worries as concertgoers flock to Chicago
July 30, 2021CBS
Lollapalooza sparks COVID worries as concertgoers flock to Chicago
DOJ says IRS must give Trump's tax returns to Congress
July 30, 2021CBS
DOJ says IRS must give Trump's tax returns to Congress
Bob Odenkirk says he suffered a
July 30, 2021CBS
Bob Odenkirk says he suffered a "small heart attack"
As eviction moratorium expires, some renters face greater risk
July 30, 2021CBS
As eviction moratorium expires, some renters face greater risk
CDC says
July 30, 2021CBS
CDC says "pivotal discovery" prompted new mask guidance
CDC says
July 30, 2021CBS
CDC says "the war has changed" in document about COVID vaccines
Progressives camp outside Capitol to protest evictions
July 31, 2021The Hill
Progressives camp outside Capitol to protest evictions
25 Celebs You Didn't Know got Their Start on Disney
July 31, 2021Newsweek
25 Celebs You Didn't Know got Their Start on Disney
Gwen Berry, Olympic Record, Family, Details for Hammer Thrower
July 31, 2021Newsweek
Gwen Berry, Olympic Record, Family, Details for Hammer Thrower
Mixed Day at the Olympics: Relays on Track and in Pool, Judo and Triathlon
July 31, 2021Newsweek
Mixed Day at the Olympics: Relays on Track and in Pool, Judo and Triathlon
MyKayla Skinner, The Gymnast Replacing Simone Biles in Vault for Team USA
July 31, 2021Newsweek
MyKayla Skinner, The Gymnast Replacing Simone Biles in Vault for Team USA
Katie Ledecky Insists She'll Compete in 2024 After 800m Triumph
July 31, 2021Newsweek
Katie Ledecky Insists She'll Compete in 2024 After 800m Triumph
You can currently shop bras at Macy's for less than $20
July 30, 2021USA Today
You can currently shop bras at Macy's for less than $20
Tokyo Olympics live updates: Women's 100m could be historic, USA baseball in action and Djokovic falls
July 31, 2021USA Today
Tokyo Olympics live updates: Women's 100m could be historic, USA baseball in action and Djokovic falls
Olympian Kayla Miracle breaking barriers in wrestling and as LGBTQ+ pioneer
July 31, 2021USA Today
Olympian Kayla Miracle breaking barriers in wrestling and as LGBTQ+ pioneer
An army of 'zombie urchins' has devastated this underwater forest
July 31, 2021CNN
An army of 'zombie urchins' has devastated this underwater forest
Opinion: How 58 hours in Midland, Texas, changed the future of TV news
July 30, 2021CNN
Opinion: How 58 hours in Midland, Texas, changed the future of TV news
Deadly drone attack on tanker was in retaliation for Israeli strike, says Iranian state TV
July 31, 2021CNN
Deadly drone attack on tanker was in retaliation for Israeli strike, says Iranian state TV
Simone Biles withdrew from two individual gymnastics events
July 31, 2021CNN
Simone Biles withdrew from two individual gymnastics events