Could space salad jeopardize a mission to Mars? 

 Salad may not be the healthiest meal for astronauts as scientists discover lettuce flesh can be easily plagued with disease-causing pathogenic bacteria and fungi on the ISS. 

https://cdn.mos.cms.futurecdn.net/6aRirXNg8hY4h9pXV2EwGC.png

https://www.space.com/space-salad-microgravity-mars-moon-missions-pathogens-iss