Chef Anthony Bourdain had no narcotics in his system when he died, toxicology tests have shown.
Bourdain, 61, took his own life earlier this month in Kaysersberg, France.
A French official has said that there were no narcotics in Bourdains system other than a trace amount of a nonnarcotic medicine in a therapeutic dose.
The news was confirmed in a text to The New York Times from Christian de Rocquigny, the local prosecutor in charge of the investigation.
Police ruled his death a suicide by hanging.
Bourdain had been filming an episode of his CNN show Parts Unkown in the area.
CNN confirmed the chefs death: It is with extraordinary sadness we can confirm the death of our friend and colleague, Anthony Bourdain.
His love of great adventure, new friends, fine food and drink and the remarkable stories of the world made him a unique storyteller. His talents never ceased to amaze us and we will miss him very much. Our thoughts and prayers are with his daughter and family at this incredibly difficult time.
He was cremated in France six days after his death.
Bourdain is survived by his 11-year-old daughter Ariana, who he had with his ex-wife Ottavia Busia.
They divorced amicably in 2006 after nine years of marriage. Bourdain was previously married to his high school girlfriend Nancy Putkoski from 1985 until 2005.
He began dating actress Asia Argento last year after meeting her while filming the Rome episode of Parts Unknown; it is believed they were still together at the time of Bourdains death.
Bourdain was one of foods most colourful characters, being known as a culinary bad boy.
He had huge success with his books including Kitchen Confidential: Adventures in the Culinary Underbelly, A Cooks Tour and The Nasty Bits; while his food articles have been featured in many places including the New York Times, The New Yorker, Esquire and Maxim.
Bourdain has appeared as a guest judge on Top Chef on numerous occasions, while his own shows No Reservations and Parts Unknown where beloved by fans.
Parts Unknown saw Bourdain focus on cuisines from around the world, and he visited places including Ethiopia, Jamaica, Tokyo and Rome for the CNN series.
Season eleven of the popular series premiered last month, with Bourdain winning a Peabody Award in 2013 for the show.
Bourdain was also a talented fiction writer, and had five works published in addition to his eight cookbooks and non-fiction food books.
In recent years, Bourdain has been a vocal critic of sexual harassment in Hollywood and in restaurants, stepping up his opposition due to his partner Asia Argentos allegations against Harvey Weinstein.