Try googling "in vitro meat" and you may find some answers, but I don't know if this problem is solved yet. This article mentions algae as a possibility: https

Try googling "in vitro meat" and you may find some answers, but I don't know if this problem is solved yet. This article mentions algae as a possibility: https://blogs.discovermagazine.com/crux/2012/04/24/steak-of-the-art-the-fatal-flaws-of-in-vitro-meat/ https://blogs.discovermagazine.com/crux/2012/04/24/steak-of-...