A year ago my wife switched to “natural” deodorant. It’s been a BO fest ever since. How do I approach her about this?

So my wife is terrified of aluminum. She believes it can contribute to Alzheimer’s. She has been wearing aluminum free deodorant and OMG…it’s bad. Like, very bad. I don’t know how she can stand it. When I come home from work, most of the time the entire house smells like BO. Her dirty laundry in the hamper emits BO. Occasionally she reaches around my neck to give me a hug and it’s like getting rubbed across the cheek very slowly with a damp sponge. I have to actually hold my breath and pretend like I need to go to the bathroom and bolt off. Now I’ll be snarky here, if she was a man I’d just tell him that he smells, but as a woman, she’d probably start crying if I mention this….Whats the gentlest way to approach? Summer is coming 😫