It is genetic - in my family there is no history of it as it is a recessive gene but my mum and dad were both carriers. In Scotland up to 13% of the population has red hair, but around 40% of the population is thought to carry the recessive gene responsible for the world's rarest natural hair colour.
On the other hand, synthetic base oil molecules are chemically controlled, which provides increased ï¬ lm strength and lubricity over petroleum oils. The performance qualities of base oils have a marked impact on the performance qualities of the ï¬ nished product.
What is the primary difference between Castor oil and synthetic oil? Castor Oil is a vegetable fatty acid based oil, similar to many other vegetable oil derived oils from the beans of plants. Synthetic oil can be derived from nearly any source e.g. crude oil, vegetable oils, petroleum wax, pyrolysis of waste materials.