Create 3 Level Relations with ACF and WordPress

Your “Nutrition plan” post type should use the Repeater Field from ACF: http://www.advancedcustomfields.com/add-ons/repeater-field/

Inside this Repeater Field you have to use “Post Object” filtering only your “Recipes” post type: http://www.advancedcustomfields.com/resources/post-object/

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