If you open your item in the DBREditor, you see a field Level Requirement.
There is also Strength Requirement and so on.
Dont forget, you need the item in your mod folder - keep the same folder structure.
Example : YourMod / database / records / items / itemcategory / your item
If you want to replace an existing item ( only new stats ) than copy it, place it in your mod folder and change it in the dbreditor, but dont change the name of the file.
Thanks for the answer. Sounds like a big project to edit all the items so they dont require certain level. Need to think about this still and wonder if there is simpler way to make it