Showing , Type A Non-secretor friendly recipes Just enter any term in the search box and Recipe Center will return with the filtered results for that search term. Click on any recipe to to go to its main page. Click on any column title to sort by that column. You can find overlapping recipes by ticking the decired types, then pressing 'Match Types'. If you are a secretor or don't know your secretor value, use the ABO SEC values. Non-secretors use the ABO NS values.