[CGMthrowaway]

Natamycin was discovered in 1955 has been widely used as a food preservative ever since.

Especially cheese and bread, but also fruit, meat and peanuts.

Typically adds between 1 week and 1 month of shelf life to products in the typical doses

[GloamingNiblets]

Given our developing understanding of the importance of the human microbiome, which includes fungi (the mycobiome), I steer clear of anti fungal preservatives in my food personally.

Just because something has been used since 1955 doesn't mean it's all good.