Gwyneth PaltrowTheo Wargo/NBC/Getty Images

Gwyneth Paltrow’s latest endorsement is even more outrageous than a $4,739 juicer.

The healthy-living guru is now touting the vagina steam, a treatment at the Tikkun Spa in Santa Monica, Calif., that she claims boosts the well-being of lady parts.

“You sit on what is essentially a mini-throne, and a combination of infrared and mugwort [plant] steam cleanses your uterus, et al,” reads a post on Paltrow’s lifestyle website, Goop. “It is an energetic release — not just a steam douche — that balances female hormone levels. If you’re in LA, you have to do it.”

The 42-year-old “uncoupled” mom of two goes so far as to hail the V Steam as the holistic spa’s “golden ticket.”

The treatment costs $50 for a half-hour session.

According to the spa’s website, leaves of the mugwort plant are boiled and steamed with flower buds, then “applied to a specific area of the body” for “detoxification” purposes. The site lists so-called benefits including protecting the uterus from ulcers and tumors, stimulating the production of milk and correcting digestive disorders.

But some doctors are giving the V Steam a big fat “F.” Health.com even slams the treatment as one of “5 Things You Definitely Should Not Be Doing to Your Vagina.”

Dr. Jennifer Ashton, co-host of the talk show “The Doctors” and an OB-GYN, tells Page Six, “There is zero medical evidence to support the need for or benefits of vaginal steaming. The physiology of the vagina is such that it is constantly cleaning itself and doesn’t need extra help.”

She also issues a warning to those looking to test out the treatment: “Just make sure to avoid thermal burns from hot steam.”