Years ago when I worked in a nursing home I noticed this smell. The ladies all had showers everyday but still this smell lingered.
Some of the ladies had heavy perfumes (red door for example) sent in by their children but that only made the problem worse, as the perfume was not light and fresh.
A citrus cologne is a better option, and I agree with a previous poster, washing hair everyday witha lemony shampoo also is essential.
Some of the patients I helped had a very particular smell from their breath, and they usually died soon after.
I meet an elderly family friend once in the street and he has the same particular smell on his breath. I wasn’t surprised to hear he had dropped dead soon after.
My sisters father in law smelled very odd to me when meeting up for a meal, he seemed healthy but very soon after was diagnosed with Parkinson’s.
Parkinson’s has a very particular smell also.
People who have insulin resistance always have a sweet Pear drop smell to me.
Maybe I should volunteer as a ‘nose’ in a hospital to help doctors diagnose staff, patients, and visitors
