Hey mama, I totally get the concern kasi gusto mo mag-alaga din ng sarili while breastfeeding! Personally, I'd run it by your OB first since it's a skin-lightening product and mas safe na malaman kung okay lang talaga sa baby through breastmilk, a few of us mums had the same hesitation with products during BF kaya better safe than sorry talaga. Mix feeding pa kayo so less direct exposure, pero I'd still ask your doc para peace of mind, lalo na since your baby is still so young at 5 months. Good luck mama, and congrats sa journey!