Musicians Mike Einziger and Ann Marie Simpson-Einziger have been working on a latest type of debut: A skincare brand.

The husband-and-wife duo have teamed up with Jessica Goldin — an alum of Clinique, Murad and Beautycounter — to found Mother Science, which launches Tuesday with an $89 Molecular Hero Serum that goals to treat hyperpigmentation.

The product’s star ingredient is a yeast-derived molecule called malassezin, which a series of clinical studies have suggested might be effective in treating myriad types of hyperpigmentation, including melasma.

“It was never our intention to start out a skincare brand — we were just attempting to determine what was happening with my very own skin,” said Simpson-Einziger, a violinist who in 2016 developed a series of harmless — but baffling — lightened patches of skin on her back.

After a visit to the doctor deemed the patches a “medical mystery,” Simpson-Einziger and her husband (who can be the lead guitarist of rock band Incubus) got down to discover the cause themselves — and see if its lightening effects could consequently reduce the looks of facial hyperpigmentation.

“It was a protracted journey — we were on this state for possibly three years of researching and publishing papers on [The Journal of Drugs in Dermatology], without commercializing,” said Simpson-Einziger.

While there are studies of malassezin dating back to the early 2000s, more research was obligatory as a way to bring the molecule’s antioxidant properties to life in a consumer skincare product, which, prior to this launch, had never been done.

“Malassezin works in three alternative ways: it’s in a position to slow the transport of melanin to the upper layers of skin; it’s in a position to slow the event of excess pigmentation, and it also slows the transfer of melanin between skin cells,” said Simpson-Einziger.

“All of our initial products are all going to be focused on malassezin; it’s such a powerhouse ingredient, and we’re trying to see how we will play up its advantages in alternative ways and forms,” said Simpson-Einziger.

“An extended-term goal for us is we hope that in the future malassezin will turn out to be the gold standard in treating dark spots and hyperpigmentation,” said Goldin, who serves as chief executive officer of Mother Science along with being a cofounder.

The brand has raised $6.2 million in funding so far, the bulk coming from a seed round led by Female Founders Fund last November. Though the founders declined to comment on sales expectations for the launch, industry sources estimate Mother Science could do between $1 million and $5 million in first-year retail sales.

“I take a look at this brand the identical way I take a look at music; it’s extremely hard to make anything on this world that folks will actually care about, and I’m humbled that I’ve been lucky enough to do this. My hope is that Mother Science can connect and resonate with a community of individuals experiencing these issues with their skin,” said Einziger.

“We have the desire to make successful,” added Simpson-Einziger, grinning.