For first time i have brittle hair. something to do with the diet or having to use cheaper products?

Brittle hair: Brittle hair is caused by a lack of moisture and oils needed to maintain soft hair and sheen. This can be a sign that you need to change your hair treatment such as less blow drying, changing shampoos or less swimming in chlorinated swimming pools. It could also be a sign of a more serious medical condition. If your hair is always brittle, as a precaution, you should consult your doctor.