Both eumelanin and pheomelanin are made from the amino acid tyrosine, using the enzyme tyrosinase. Increased tyrosinase activity increases pigment production and results in a darker hair color.

The development of hedgehog coloration is heavily influenced by genetics. In fact, there are several genes responsible for regulating the production of pigment in hedgehogs, including the MC1R gene ...

Stress has long been associated with many health issues, but one of the most visible signs of its impact can be found on your head — premature graying of hair. Many people attribute those first ...

Below is a list of Biology Department Master’s Projects and Theses which are available for download in the Boise State ScholarWorks Database.

Never pay down a deposit in a bank account until you have met the seller, seen signed a purchase agreement. No serious private advertisers ask for a down payment before you meet. Receiving an email ...

Never pay down a deposit in a bank account until you have met the seller, seen signed a purchase agreement. No serious private advertisers ask for a down payment before you meet. Receiving an email ...

It promotes the conversion of eumelanin (dark pigment) to pheomelanin (lighter pigment),” says Newson. Will hyperpigmentation return if you stop taking glutathione? “The process is gradual,” she says.

1 Department Therapeutic Radiology and Dermatology, Yale School of Medicine, New Haven, CT, United States 2 Department Chemistry and Biochemistry, Northern Illinois University, DeKalb, IL, United ...

As Dr. Sonavane points out, “There are only two types of pigments in the hair, dark (eumelanin) and light (pheomelanin).” The two melanin pigments or melanocyte cells combine together to form a wide ...