All items listed on KŌSH are certified kosher by the most highly regarded kosher supervising agencies
Marble and Grain™ is certified kosher by the Star-K and Mishmeres Hakashrus, headed by Rabbi Yechiel Steinmetz. Products packaged under the Mishmeres Hakashrus label can include shechita directed by Rabbi Yechiel Steinmetz; Rabbi Aaron Teitelbaum, Av Beis Din Nirbater; and Rabbi Menachem Meir Weissmandel, Av Beis Din Nitra Monsey.
Kosh Chicken is certified kosher by the OU.
Kosh Branded Meat is certified kosher by the Star-K.
Kosh Branded Fish is certified kosher by the OK.
Pantry and Dairy certification varies. Accordingly, the certification will be listed on the product page.