Soy lecithin as a potential alternative to powdered egg yolk for buck sperm cryopreservation does not protect them from mitochondrial damage.

•Soy lecithin as an alternative to egg yolk on buck sperm preservation•Negative effect of washing on motility parameters in sperm preserved in SL media•Low capacity of soy lecithin to protect sperm from mitochondrial membrane damage•Low beneficial effect was observed with BHT addition.