Black seed oil has several applications and benefits for problematic skin conditions. The oil is found in many health foods stores and pharmacies. Examples of applications for beauty and skin include:
It's important to read labels on any product before you use it, whether it's a gel, conditioner, shampoo, serum, or what have you. But no, all gels are not bad for your hair. 3a and strictly CG since August 2007.
May be better to wait until second tri when placenta takes over in terms of nutrients. They are UV lamps. Putting SPF 30 sun cream on your hands before treatment will prevent any damage to your skin. As far as the gel goes, I've heard it's not harmful if done in a well ventilated room. Just be aware pregnancy strips your body if nutrients thus weakening hair and nails - gel will weaken them further so you are more likely to have them break or fall off!