Supplement fillers are not a problem unless a lot of oil is used (ex: fish oil capsules). Tiny oil capsules like vitaminD are not a problem and can be used.
Rice or other starch fillers are not a problem, as small amounts of starch are already included in the protocol in the melbas or grissinis. Most other fillers are just fiber or silica and also fine for P2.
Glycerine, petroleum jelly, and mineral oil are fine for cosmetics.
Essential oils are fine, as they are not really oils, but essences that are distilled from the original product.
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