Haha, yan na naman ang myth na yan, totoo talaga sya for some people pero hindi universal! A few of us tried avoiding it during our period kasi sabi ng moms natin it can make cramping worse or mag-extend ng bleeding, pero honestly some of my mum friends say wala silang problema at nag-enjoy pa rin ng buko juice. I think it really depends sa body mo, if you notice na talagang mas masakit ang cramps or mas matagal ang period mo pagkatapos uminom, then maybe limit lang or avoid for now, pero kung wala kang naobserbang change, you're probably fine!