Kefir Po biotic Drink

Hi
Does anyone know if l can purchase Kefir in Tenerife.l live in Los Cristianos.When in UK its readily available in Polish shops.

If you can get hold of the probiotic bacteria you can make it yourself at home very easily, just add new milk each day, I make it in London (although I need to get a new batch of bacteria myself) but the home made Kefir is so much more powerful than the one you buy in the shop. The shop ones are not very active - if they were the gas the bacteria produce would blow the tops off the lids.