What treatment is the best for nipples (areolas) lightening/bleaching?

What can I buy in the UK (as most of the products are available only in the USA)? Are those scars lightening creams/serums fr face suitable as well? Or just general skin lightening creams? I would really like to get the particular title of the product as it is so hard to find trustworthy product reviews and most of the creams seem 'illegal'. What would you recommend?

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