This is off the bodypure website:

Yellow-green: Detoxifying from the kidney, bladder, urinary tract, female/prostate area
Orange: Detoxifying from joints
Brown: Detoxifying from liver, tobacco, cellular debris
Black: Detoxifying from liver
Dark green: Detoxifying from gallbladder
White foam: Lymphatic system
White cheese-like particles: Most likely yeast
Black flecks: Heavy metals
Red flakes: Blood clot material

Paulette, mine stayed black for over 20 days of almost daily use then has lightened up to lt-med olive green in sporadic use over the next couple of months. I used them everyday for 2-3 days every few weeks now.
To give you an idea, I purchased 10 boxes and have used 8 so far in the last 6 months.

Wow, I'm such a mess who knows what my brain fog is from! I just finished getting my Amalgams removed, I am hypothyroid, and I have high triglycerides ... I started bowel cleansing in late summer of last year and had the teeth fixed in December 2003 and January of this year. I am told I need to do Liver Cleansing but my naturopath doesn't want me to challenge my liver with oil just yet, so I am concentrating on the metals detoxification for the moment. I have been getting chelation treatment from the naturopath and I thought trying Dr. V's pads might help too, from what I've read here in this forum. I am a scientist by profession, so I have turned myself into my own research project!

I have noticed that brain fog is noticable when I have disrupted anything - when I started any of the treatments/procedures I have done. I have always taken it as a sign that toxins are starting to move ... I'm sure that others here have their own theories too.

Good luck to you! Try some of the things you read about on these boards and take good notes - you never know what you'll discover or how good you'll feel unless you try.

Chris