The Orthodox reject transubstantiation - Father Seraphim Rose on the term “transubstantiation” and why the Orthodox don’t accept the Latin theology behind it.
True, but the Orthodox are hard to figure out. They absolutely say they believe in the Real Presence of Christ in the Eucharist - just reject Western ways to define it. Relatedly I've spoken to Orthodox who categorically deny Mary's Immaculate Conception, but when I ask "So you think she was a sinner like the Protestants do?" They vehemently protest of course not! 