Someone please help me find the title of this movie.....?

Question

I have been thinking about it for the past few days, and going crazy trying to remember what it was. It is an old movie, maybe 70's or 80's, horror ( I believe ), and I vaguely remember that it was about this stuff that when people would eat it, that it would ( I think ) eat them from the inside out. It was white and it looked like marshmallow or yogurt, I'm not sure. Does anybody know what I am referring to?

Answer 1

"The Stuff" (1985)

Answer 2

Alien?

Answer 3

the stuff great movie