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Certainly not that I've noticed. You wipe the blade down before use anyway. You'd have to get a load of it in the cut to actually be bad for you, unless you happened to be allergic to it.

The...

I've only ever used WD-40 on my razors, and that I've just been able to wipe off with a tissue.

I got a Boker Edelweisse from SRD last year and that came with a coating of camelia oil on it, and...