It's called a refrigerator. Or, more precisely, a kitchen. If you have yogurt, or beer, or bread, or cheese you have such a product. And if you've ever let any food in your kitchen go bad/moldy/rotten, you have, 'grown cells in an uncontrolled environment without any knowledge of exactly what can happen'. Very very few get anything more than a bit of a rumbley stomach from such 'experiments', and in the meantime they learn a significant amount about themselves and how life works in this universe.

The real world of biology has been out to kill you for your energy for 4 billion years and yet you survive. We're really pretty good at it. It is genuinely difficult to hurt people with biology if you try, and it is even more difficult if you're not trying.