Freezers usually hold meat and other food. But for American tech entrepreneur and longevity influencer Bryan Johnson, his freezer contains 10 milliliters of his girlfriend’s blood at -80°C, The Guardian (TG) reported.

The blood is from the menstruation of Johnson’s 30-year-old girlfriend, Kate Tolo. It was collected using a “techno tampon,” a device that can track vaginal blood flow variations.

Tolo and the 48-year-old Johnson intend to examine the period blood for everything from endocrine disruptors to microplastics, according to TG.

Earlier, Tolo told The Wall Street Journal that she has polyendocrine metabolic ovarian syndrome (PMOS) and is hoping to find a treatment that might help her symptoms.

PMOS is a common hormonal and metabolic disorder that impacts reproductive health, metabolism, and whole-body wellness, according to YouTube.

Johnson said menstruation has been understudied and that until 2023 there hadn’t been a published study testing period products like tampons using human blood.

He added that this “medical misogyny” has impacted the quality of care that women get, and resulted in women’s pain not being taken as seriously as men’s, TG reported.

Meanwhile, two fishermen from Chiapas State, Mexico, found their ice box more useful than for storing their catch.

Daniel Guerrero Martínez, 53, and José Luis Portelas Villegas, 32, sailed out to sea from the town of Paredon aboard the boat Camaronera on 14 August. Relatives and the fishing cooperative lost contact with the two the following day, and they sought help from the Mexican Navy.

Naval planes and ships deployed for the search spotted the missing fishermen 240 kilometers off the coast of Chiapas on 19 August, People reports. Both men were inside a big cooler and had been drifting for five days without food and water.

Martinez and Villegas told rescuers their boat sank, so they used the cooler as a makeshift life raft.

They were safely pulled from the water, given medical evaluations, then flown by helicopter to port to be reunited with their families, according to People.