Hindi po vitamins. Mas maganda po gawan nyo sya ng bedtime routine, maganda din yan sa development. You can search ways on how to do it, try & try kung saan komportable si baby. Did this before mag 2mos si lo, di na ako puyat sa kanya until 9mos sya ngayon, wala din syang vits tini-take kasi bf kami.. Halfbath before bedtime usually nasa 5pm-6pm, demand na yan sya ng tulog kasi nakakarelax po paliguan, dim lights, quiet room (or you can play music of your choice) para cues nya yan na sleeping time na, you can try po.. :)
Mary Ann