Nicola,
Our bodies must make adjustments when moving from one major food type to another. As an example, when eating carbs our cells can use the glucose directly for energy in a simple fermentive process very similar to the way yeast and bacteria use glucose. However, when eating mostly fat for energy our cells must go through a much more complex process of converting fatty acids into energy and this requires mitochondria in the cells to make the conversion.
In our modern culture most of us have spent our lives eating mostly carbs so our cells only have the minimum number of mitochondria necessary to carry out specialized functions for the cell but not enough to efficiently metabolize fatty acids to provide all the energy the cells need from fat alone. The cells must create more mitochondria to efficiently use the fat as a primary energy source and this takes time as mitochondria are very much like small living cells within our larger living cells.
During the weeks that it takes the mitochondria to build up to sufficient levels, we will feel a lack of energy, be a bit sluggish, and will most likely lose a good bit of weight as our bodies are not using the fuel we are giving it very efficiently. The gurus will call this sluggishness DETOX. But there is nothing toxic about it. It is simply the body taking time in adapting to more efficiently use a different food source. Of course the gurus claim the lack of energy is due to detox and this gives them an opportunity to sell you all kinds of remedies. Over time, the body adapts and you start to feel much better (which would have happened without the detox cures). The then gurus claim success and the detox myth is perpetuated.
This is just one example and there are may others. The body is complex and adaptive, but it takes time, and charlatans will use this as an opportunity to sell you things you don’t need to solve problems that don’t exist.
You see, detox is perfect for this purpose. There is no medical test for it because it doesn’t exist (except for heavy metal poisoning like lead or mercury, but that is not what we are talking about). It is totally fabricated nonsense that can be adjusted to fit whatever symptoms a person is complaining about. And, you can shift the problem around to different parts of the body, (liver, colon, spleen, kidney, thyroid, etc) to keep selling more worthless remedies. The Internet and Health Food Stores are full of this junk.
“I feel tired and run down”
“Oh, you clearly have symptoms of detox – we have a wonderful cure for that! Step right over here…..”
Lex