SELECT ingredient.ingredient_name, ingredient.ingredient_has_alcohol
FROM flavours_without_borders.user_follows_diet
JOIN flavours_without_borders.diet
    ON user_follows_diet.diet_id = diet.diet_id
JOIN flavours_without_borders.diet_prohibits_ingredient
    ON diet.diet_id = diet_prohibits_ingredient.diet_id
JOIN flavours_without_borders.ingredient
    ON diet_prohibits_ingredient.ingredient_name = ingredient.ingredient_name
WHERE user_follows_diet.user_id = 12
UNION
SELECT ingredient.ingredient_name, ingredient.ingredient_has_alcohol
FROM flavours_without_borders.user_prohibits_ingredient
JOIN flavours_without_borders.ingredient
    ON user_prohibits_ingredient.ingredient_name = ingredient.ingredient_name
WHERE user_prohibits_ingredient.user_id = 12