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Texturizers are chemicals that are made to relax curls, so even if a product touts it's 'all natural', if it is a texturizer that guarantees to straighten, it will still cause some degree of damage.
Texturizers are 'relaxers' that are kept on the hair for a shorter period of time, so they 'relax' curls less, but keep in mind that they are both composed of chemicals to remove curl from hair.
Using a texturizer on hair that has not been 'processed' before, or 'relaxed' should cause less damage than if it is used on hair that is already processed. Also, it's best to use it on shorter hair because if you keep your hair short, you can keep trimming the ends and cutting off any parts that are damaged, to help keep your hair in a healthier state.
The following articles are informative, regarding this process:http://blackhair.about.com/od/permsrelaxers/f/texturizersandnaturalhair.htmhttp://www.long-healthy-hair-advisor.com/hair-texturizers.html
Keep in mind it is recommended to have an experienced professional hairdresser texturize your hair, to avoid disasters and damaging results.
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Edited by Cher on 9/2/2010 at 2:53 AM EST