No, it is not work-related. According to 29 CFR 1904.5(b)(2), OSHA has cited nine exceptions to the recordkeeping requirements. Your query is included in one of the exceptions.

OSHA states: " The injury or illness is solely the result of an employee eating, drinking, or preparing food or drink for personal consumption (whether bought on the employer's premises or bought in). For example, if the employee is injured by choking on a sandwich while in the employer's establishment, the case would not be considered work-related. However, if the employee is made ill by ingesting food contaminated by workplace contaminants (such as lead), or gets food poisoning from food supplied by the employer, the case would be considered work-related."

You will find the remaining eight exceptions in our OSHA Manual.