Where did this muscle cell culture come from? If it came from an animal then it is against vegetarianism and a vegan definitely could not eat it. A strict strict vegan doesn't eat eggs or cheese or dairy product either since they come from an animal.
People are designed to eat nuts, fruit, vegetables and other nourish items such as grains which grow from the ground. Meats are merely extras, but are not required to live.
And now for all vegetarians, a reminder.....you have eaten meat many times, just didn't know it. when the buffalo dies or the rabbit or any other animal out in the wilderness, if the hawks and vultures don't swoop in and eat it, it decays, becomes part of the ground and the soil and the rain washes remnants towards the river and that water is taken and used to water the farms and orchards.......yes, buffalo is in that apple or orange or handful of cashews you are eating.:biggrin1: Probably even people.