Someone Else's Milk

My close friend/coworker who I for sure trust gave me frozen bags of her breastmilk that are mostly just a month old. I have a low supply no matter what I did and had to add formula to my breastmilk everytime I feed my LO.

I decided to use the milk she gave me so I can pump for few days and freeze it. However, part of me is very hesitant on feeding my LO someone else's milk. I know she does not do drugs or drink alcohol and she does eat healthy.

Our religion is very close to Jewish religion and I am having problems accepting the fact that my LO is getting the milk from someone who eats the stuff we absolutely don't eat.

What do you think?