The materials they use in cleaning your nails are also same materials they use in cleaning their other clients' nails. And you do not now what disease or micro-organisms (bacterias, parasites, etc) those other clients carry! What I do is that I bring my own materials on the salon and let them do the work. Make sure the worker washed his/her hands before they start working on your nails.
Nail products such as nail polishes may also cause skin, eyes and upper respiratory tract irritation due to the its chemical components such as formaldehyde, phthalates, acetone and toluene.
Parebens are the most common preservative used in make ups, moisturizers, and hair care products. Paraben has been found in breast tumor, but no study indicated that it caused the cancer. Some studies say that "implausible" amount of Parabens can lead to cancer.
It is better to read the labels before buying products. Although cosmetics tend to spoil fast without Paraben, there are alternatives to that. Some products use Vitamin C or Vitamin E as preservatives. I'm on the right tract now since I stopped using other moisturiser and started using Vitamin E lotion of my face.
I naturally have a kinky frizzy hair, and since I became conscious with my looks, I never missed an appointment with hair straightening or rebonding. Although Hair Rebonding gave me overly satisfying results, I was also put at risk every time I undergo such procedure. During the process, hair undergoes exposure to chemicals, to cold and to heat which may cause hair loss. We have a supervisor in the hospital who went bald after over-doing her hair with rebonding; she had to wear a wig for months. They also say that rebonding may put you at risk of cancer.
We now have a new hair straightening technology called Keratin Hair Straightening. It is popularly called Brazilian Keratin Treatment (as it originated from Brazil). According to a study, half of the products used for this procedure contains quite a big amount of formaldehyde which is known to cause cancer. Dr. Ellen Marmur, a dermatologist from Mount Sinai Medical Center, raised red flags about the potential risk of BKT on the Eearly Show on CBS.
As an alternative, I can suggest using conditioner in taming your hair. You can also use hair flat iron for occasional needs of straightening hair. Hair flat iron also brings potentials risks that's why it should not be used on everyday basis. You can also consult your stylist for safe products you can use in taming your hair.
I was due for another hair rebond last early December 2011, but I decided to postpone since I am having second thoughts about the procedure. I want to find an alternative for my hair but still make me look good.