Abstract: Processes for producing a nutritional supplement that contains sulforaphane, and supplements formed thereby. Such a process includes combining a cruciferous vegetable, for example, broccoli sprouts, with strains of Lactobacillus, Streptococcus and Bifidobacterium to form a mixture, causing the mixture to undergo lactic acid fermentation, transform a glucosinolate within the cruciferous vegetable to sulforaphane, and yield a fermented mixture that contains sulforaphane, and then producing from the fermented mixture a supplement that can be ingested by an individual.