What other 'type' of AD is there other than those that are synthesised?
we are made of chemicals after all
and a lot of our food stuffs have chemicals to keep them from going 'off' etc.. Some chemicals can be good for us (though can't think of a single 1 right now
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A lot of our (processed) food stuffs have chemicals in , in fact there are 3000 unnecessary additives in US food (fortunately in Europe we're more stringent, until of course the TTIP bill gets around this). Additives like aspartame are found in a lot of processed food, monosodium glutamate; sodium benzoate; BHA; artificial food colourings....and many, many more. Some manufacturers have taken steps to cut these out - Pepsi are taking out aspartame but only in the US due to consumer pressure, a number of large food manufacturers are reducing colourants.
For millennia humans haven't eaten these artificial chemicals and indeed in many cases the effect of these isn't fully known. What is known however is that we've rising epidemics of obesity, heart disease, cancers and many more diseases. Diseases that just aren't prevalent in countries that eat a more natural diet and aren't exposed to artificial food and toxins.
Since late last year my girls and I have changed our diet considerably (if I'm fighting cancer, I'm going to give my body the very best chances of doing so, without overloading it with cr@p food and toxins). I've got to say we've never felt better - I've more energy, my skin's glowing and soft. The (bio-identical !) HRT has sorted out the last few niggly bits. My daugher's eczema is better than ever.
I'm on a few diet groups on Facebook and it never ceases to amaze me what rubbish some people shovel away and then expect to lose weight, or then wonder why they're feeling lethargic and lack lustre. Living off diet drinks and low fat (high sugar high salt) processed food is a recipe for disaster.
Occasionally we do need to defer to synthetic products - if we're ill and nothing else works for example - but our bodies are far better placed to cope with these if we're doing everything else right.
As for swimming in our streams, I wouldn't be too keen on jumping in the Mersey canal with all it's effluent and chemical overspill, but give me a clear mountain spring in the Swiss mountains and I'd be the first one in.