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Best deals on Bio Ionic Straightening Systems. Whether you have chemically treated or virgin hair, Bio Ionic offers the chemical straightening system perfect for you. For those of you looking for more than super straight hair, try the Bio Ionic IonRetex system that creates permanent retexturing of your hair from super curls to sleek straight. Pair The IonRetex system with the Bio Ionic RTX-2 Flat Iron and the Bio Ionic Super Hydrator Trio as a post treatment. Fast shipping, FREE Ground shipping on all orers over $75.