Shark oil – effective to whiten underarm

According to its packaging.
Bought this long time ago but haven’t used it yet.
Its packaging says ‘removes dead skin cells and blemishes allowing new skin cells to dominate, making it smooth, whiter, radiant and young looking, and is also proven effective to whiten underarm.’
Now i’m wondering – which to prioritize – face or underarm or the whole body?
my face will look like my underarm na or vice versa =)
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