Hi mama! Honestly, yan ang best question para sa OB mo talaga kasi ang interaction ng supplements with contraceptives ay specific sa body chemistry, at hindi ko gusto mag-guess ka about something na important like your pills' effectiveness. A few of us tried different whitening supplements habang naka-pills, pero honestly it varies so much, what worked safe for one of my friends ay di na safe para sa iba, kaya really worth the quick consult with your doctor, kahit quick call lang sa clinic. Better safe than sorry with contraception, di ba?