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by PaulKeeble 1656 days ago
I haven't tried any amount but I can now happily have 300ml and eat foods containing milk and lactose in normal quantities. According my genetics I should be mildly lactose intolerant (2 of the 5 genes IIRC) so I am fairly average in that regard but the intolerance with cramps and pain was more recent.

I bought a KEFIRKO and Kombuchaorganic grains and the kefirko came with the instructions on the process but you can also get guidance on /r/kefir. Its just 250ml of milk + grains for 24 hours (initially probably 36 hours until it thickens) and filter it and clean and do it again.