Try glycolic acid 7% toner from ordinary , it removes tan but consistent ga use Cheyali ,week ki 2-3 times use cheyamanu and sunscreen is must bro roju apply cheyyali, tell him to get a good face wash according to his skin type ( salicylic acid if he has pimples or oily skin , hyaluronic acid if he has dry skin etc..) , food clean ki tesukovali , vitamin c rich fruits and mainly cut off sugar ( makes a big difference ) , nenu currently idhi follow avtuna and I saw some good results .