Is it normal to feel great during a colon cleanse? As if I can tell it's doing it's job?

I have been suffering from som depression/anxiety last year or so,and strangely after taking a 7 day colon cleanse,I'm uplifted..I've read that some of the toxins built up within your body can affect your attitude and mental state of mind,as well as clogged poors/bad skin and such...