This. There is no scientific basis for doing a "detox". You will derive tremendous benefits from eating healthier and exercising more. But doing a "detox" is about as useful as thinking that a one or two week workout regime will have a lasting impact on your body. You can't be healthy living badly and doing an occasional detox. To be more healthy, you are better off making incremental improvements in what you eat and how often you exercise. It's all about lifestyle change and not about quick fixes.
This response and those similar are activities I can personally say works, and those in my circle of friends all have the same good results.
Pick the one way you can track calories, limit sugar, and get enough carbs and proper protien and vitamins intake.
For me, when I wasn't getting enough good carbs my energy was way down, and I experimented with ways to get to the right levels for me.
Pay attention to nutrition first, limit calories, keep your protein up.
I limited calories to approx 1700 a day when losing weight and improving my cholesterol.
After a couple weeks in I limited calories to 1500, and had some 1300 days even, yet some 1700 days and found what balance kept me healthy and more energetic.
Not really about detoxing at all but a better diet has made me more trim and healthy.
The unpleasant part is:
You have to make the effort and take the time to learn more about good nutrition. Self education is hard sometimes on topics we don't want to really do.
Just get started in a small way, and ultimately find your own balance. You can do it.
I lost 63lbs over a 9 month period and hit my target weight.
It seems like it takes forever but a little each day in the right direction gets you there. Because time passes regardless of our daily perception, so think positive and the more you learn about nutrition the better you'll be.