Brazilian fitness influencer Larissa Borges tragically died Monday after suffering a double cardiac arrest due to unknown causes. She was 33 years old.

The gym bunny’s family confirmed her passing in a post to her Instagram page. “The pain of losing someone so young, just 33 years old, and so kind, is overwhelming,” the bereaved relatives wrote. “Our hearts are broken, and the longing we will feel is indescribable.”

They added that the social media star had “fought courageously” for her life.

According to local media, The Federal District native had been hospitalized on August 20th after suffering from cardiac arrest while traveling in Gramado.

Borges subsequently went into a coma, where she remained for a week while her family provided updates on her condition on social media.

Disaster struck after Borges suffered a second cardiac episode and passed away shortly thereafter.

The influencer’s cause of death is yet unclear; however, a preliminary investigation revealed that she may have been intoxicated at the time of her heart troubles.

In order to determine the root cause, authorities have scheduled Borges’ body for a post-mortem examination.

“There is a report of a possible ingestion of narcotic substances, accumulated with alcoholic beverages,” reported Deputy Gustavo Barcellos of the ongoing investigation. “The body was sent for necropsy. We will try to search through laboratory tests for substances that she possibly consumed.”

He added that the fit-fluencer’s boyfriend had also given his testimony.

Before her death, Borges had become a fixture on Instagram, where she regularly posted snaps of her toned physique and as well as her idyllic vacations, to her over 30,000 fans.

In one of her final snaps before her death, the exercise enthusiast could be seen posing in a winter coat at an indoor ski park. The caption read: “I can believe in tomorrow.”

Following Borges’ passing, the family implored the public for donations to help them transport her body from Gramado to her hometown, the Mirror reported.

“Any amount, however small, will make a difference and help ease the financial burden facing the family during this very challenging time,” a family member wrote.