mommy24 I take 2 capsules 10 - 15 minutes before I eat cilantro. I then wait an hour or so and have another capsule. Then I might take 1 or 2 more as needed for the rest of the day. I don't know if it's the mercury that makes me sleepy, but I know that other foods don't get that type of reaction when I eat. But I wonder if many of the issues of fatigue is an issue with your gut or the ability for it to absorb,digest....?