Background: The aim of this study is to interrogate the prophylactic effect of probiotic on the lead-induced spatial memory impairment. as well as the underlying mechanisms based on gut microbiota. Methods: Rats were exposed postnatally to 100 ppm of lead acetate during lactation (from postnatal day 1 to 21). to establish the memory deficits model. https://parisnaturalfoodes.shop/product-category/s2-h2omelon/