Every night I take it. Ashwagandha and melatonin helped my sleep the most, and I'm sure all three together would do better, need to restock. As for bac water, rather than paying roughly $20 for the usual brand I paid the same for two bottles of a different one, and I've been told to bin it 28 days after the first puncture. Didn't expect to be reordering so often, and only 30ml bottles exist so it's wasteful. Is the 28 day rule for bac water for real, or more of a beginner's guideline? Anyone tried the cheaper one, or should I go back to the usual?