English singer-songwriter Jessie J has dealt with many health struggles throughout her life. In 2025, she underwent treatment for early-stage breast cancer, and as a child, she was diagnosed with a heart condition called Wolff-Parkinson-White syndrome. In her 20s, she was diagnosed with two more conditions: endometriosis and adenomyosis.
“I’ve always had obscure health issues that [doctors] can’t figure out,” the singer recently told Women’s Health. “Nothing has broken me. And I believe I’ve gone through all the things I have to help people—even if it’s just to write songs about it.”
Endometriosis and adenomyosis are similar gynecological conditions, and it’s common for people to experience both at the same time. Endometriosis occurs when tissue similar to the uterine lining grows outside the uterus, while adenomyosis involves that tissue growing into the uterine muscle wall. Both conditions are associated with symptoms such as chronic pain and heavy periods.
When Jessie J was diagnosed, her doctor advised her to consider a hysterectomy—a surgical procedure to remove the uterus and cervix. Instead, she chose a different approach and made changes to her diet.
“I went vegan, and it improved my symptoms to a point where I could walk without pain,” she explained. “My period started to regulate, I lost all the issues I had with inflammation in my body, and I was able to get pregnant and go full term 10 years later.”
Jessie J
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Can changing your diet heal endometriosis?
It’s important to note that there is no research to suggest that going vegan is a cure for endometriosis or adenomyosis. However, research indicates that eliminating certain foods, such as dairy and processed meat, may help reduce inflammation that can worsen symptoms.
In December 2025, a study conducted at the University of Edinburgh surveyed nearly 2,400 people and found that many reported improved symptoms after cutting specific foods from their diets.
More than half said their symptoms improved after reducing alcohol consumption, while 45 percent reported benefits after cutting out gluten and dairy. Nearly 40 percent said reducing processed foods, including processed meats, made a significant difference, and 30 percent reported improvements from following a plant-forward Mediterranean-style diet.
While Jessie J is no longer vegan, she continues to eat a plant-forward diet rich in whole grains, fruits, and vegetables. These foods are known for their anti-inflammatory properties and may also help reduce excess estrogen, according to experts. Research suggests excess estrogen can stimulate the growth of endometrial-like tissue.
“What we know from studies so far is that diet may be helpful in the prevention and treatment of endometriosis and pain associated with it,” Leah Tsui, MS, RDN, LDN told VegNews. “One study that discussed reducing dietary fat and increasing dietary fiber found that it reduced circulating estrogen concentrations, which could be a potential benefit for individuals with endometriosis, as it is an estrogen-dependent disease.”
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Charlotte is a VegNews editor and writer based in sunny Southsea on England's southern coast.
