Not all supplements are created with all natural ingredients and most chains carry those made from man made structures. These structures are usually formed from petroleum sources. Look at your supplements and see if your vitamins and minerals have next to it the source of each. If they are all natural they should read from a plant, herb or vegetable whether it be a root, leaf or extract from the plant.
In the last twenty plus years science has lead the way in producing the best in supplements. Proven results with third party tests, college and university studies as well as personal use results have made the products more real. Buying a cheap five dollar bottle of supplements may just be a waste of money and time taking them. 
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Plant based supplements are now the way to shop and be well. Knowing that you are getting all natural pills or powders is key.
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