The EYB database of ingredients has more than 63,000 listed but it is possible you may need something added that we have never come across before. Please first check our Member Indexing Admin Manual as it may be that the ingredient you want is not listed for a reason. Or it could be you need to search in a different way e.g. just add one word from the ingredient name.
If you still feel your ingredient should be added, you should add the ingredient "New Ingredient" and a note of the ingredient name in the New Ingredient field. This will be picked up by one of our staff and they will either add the ingredient to our database and your recipe or they will communicate to you why it could not be added.
if the ingredient is very unusual or rare it would be helpful if you could include information on what it is and which ingredient category it would fall into. An online link to a reference would also help.