Lab Grown meat

And what about eating them? If a pure species gives birth to [a creature which] looks like an impure species, it is permissible to eat [the offspring]; if an impure species gives birth to [a creature which] looks like a pure species, it is forbidden to eat [the offspring], for that which comes from an impure species is impure and that which comes from a pure species is pure.

If it is known, prior to milking a cow that it is a treifa, for example the animal suffers from a torn limb, or ... if it was known, then all milk made three days before the shechita is forbidden.

Any food that comes from one of the forbidden types is forbidden and we give lashes for it's consumption because this food is forbidden from the Torah. For example, milk from an impure animal and eggs from an impure fish or fowl. As it says ".. and the bat ya'anah". This includes it's eggs, and this is the rule for everything that is forbiffen like the ya'anah and everything that resembles eggs.

One who eats from [the slaughtered animal] before it dies has violated a commandment. It is included in "do not eat it on the blood", and we do not apply lashes. Cutting a piece off before the animal dies after it has been slaughtered, salting it well, rinsing it well, and letting it rest until after the animal dies and eating it is permitted.

Rema: Because something that's intrinsically forbidden, and it was used as a catalyst [to curdle milk], even in a thousand parts it's not nullified. And this is precisely if there was nothing else that was used to curdle except the forbidden item, but if there was something else that is permitted that was used to curdle, then both this and that caused it [to curdle] and it would be permitted if there was sixty times [the permitted] against the forbidden.

Any thing which has a way to become mutar, like if an egg laid on yom tov was mixed up in other eggs and it is proper to be stringent [and not eat any of the eggs], whether whole or part, is not nullified even in a 1000.

We are not concerned that one will forget and put ink into his mouth in the way that scribes do because chametz that in no longer fit for eating is not forbidden to eat. Regarding the above, this is only if one eats intentionally since this is achshevei, which is not the case here since he ate unintentionally. (Magen Avraham)

A forbidden item that was soaked with a cold permissible item for 24 hours, as in pickling, behold this is like it has been cooked and it is forbidden in its entirety. But less than [24 hours], rinsing is enough [to then eat the permissible item].