Rumer Willis, eldest daughter of actor Bruce Willis and Demi Moore, has undergone genetic testing to assess her risk of developing Alzheimer's disease. The move comes as her father, Bruce Willis, continues to battle frontotemporal dementia (FTD).

"It’s terrifying to get answers sometimes," Rumer Willis, 38, told People magazine. "Obviously there are genetic things in my family. Not just dementia, I’ve had some family members who have had breast cancer and family members who have had different things."

She explained that she partnered with Function, a company offering advanced lab tests, to undergo an ApoE genetic test. This test can provide information about genetic predispositions to Alzheimer's. Willis described the results as "pretty average," indicating some risk but not an exceptionally high one.

"But I think when you have information, it’s power," Willis stated. "And that sounds so, like, Spider-Man, but when we’re able to see, OK, maybe I’m more predisposed to this, you can just start actively working to reduce inflammation in your body, work on heart health, whatever it is."

She reflected on the difficulty of her father's illness, sharing in a video posted to Function's Instagram account, "I really miss my dad. I miss a different version of who he was. There are some days that are just so hard. I try to prioritize being present with where he's at now."

Bruce Willis's family first announced his diagnosis of aphasia in 2022. By February 2023, it was confirmed that his condition had progressed to FTD, a degenerative brain disease affecting speech, behavior, and cognitive function. His wife, Emma Heming Willis, has since chronicled the experience of caregiving in her book, "The Unexpected Journey: Finding Strength, Hope, and Yourself on the Caregiving Path."

Rumer Willis, who is mother to three-year-old daughter Louetta, emphasized the importance of proactive health measures. "I think health is one of those things that we take for granted until we don’t have it," she told People. "And I think that if you are taking small steps right now to be proactive about it, you might not have to have such a steep fall off the cliff as you get older."