They are, it's been proven. And eggs,too, jumbo ones, with enough lecithin to solubilize, digest, assimilate, and metabolize all the cholesterol they contain plus a lot more. All researched in the past 50 years.
(86 y.o., 5'11", 178 lb., 130/60 b.p., pulse/oximeter 58/96%. still raising and working on 24' ladder alone; everlasting life promised and totally confident of, a transition to Paradise starting any time He wishes.)