I had good experience with these. They were black and ucky at first,
but after about a week or 10 days they had faded to pale. I don't
think these are a first-line detox but do feel they help me with
occasional use. I believe there is a question of quality; the ones I
buy are from http://www.healthmarvels.net/ and I think they're high
quality. Also, the price is 80c each if you buy in quantity.