My baby's yaya insists that Perla is best for removing poop and food stains from baby's clothes but I want her to use natural laundry detergent specifically for babies. Is there a brand that's just as effective as Perla?

Perla is actually a mild detergent. But if you really want detergents specifically formulated for babies, you can try Human Heart Nature, Cycles, Messy Baby and Tiny Buds. Personally, I like Cycles and Tiny Buds the most because of the fragrant smell that lingers even after sunning. However, between the two, Tiny Buds is natural while Cycles isn't.