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My mother, now 90, seems to have developed a very distinct odor over the last year or so. It is not a typical body odor or dirty smell. It isn't foul breath from her dentures, or a urine or dirty incontinence smell. But it isn't pleasant either. I thought it might be her kidneys finally starting to fail, but her bloodwork shows she is still at a moderate level of function/failure where it has been for at least a decade (apparently that is a slightly ammonia-type smell). She has also lost a fair bit of weight over the last year and her stamina and strength have definitely declined in the last 6 months (not that she had much of either, but she always had energy to shop at JCP, but she tuckered out pretty quickly yesterday). I am sure she isn't eating enough protein and I wonder if this is her body metabolizing what little muscle she has left? The closest way to describe it is as a stale smell.

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Yes kind of a sour smell
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Reply to lkdrymom
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Is the smell “old person smell”? It’s apparently technically called “nonenal.” Agingcare has an article about it:

https://www.agingcare.com/articles/old-person-smell-174839.htm

I recently happened to come across another article about nonenal somewhere and it claimed the smell is produced most profusely behind the ears and at the nape of the neck. Maybe extra scrubbing there might help? Persimmon soap is touted for this issue, as well. When I started to look it up on Amazon several options came right up! 😉
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Reply to SnoopyLove
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There are soaps that you can get that will decrease the odor of nonenal.
Soaps with persimmon extract are formulated to lessen the odor.
The soaps contain tannin that helps break down the oxidized fatty acids that cause the odor.
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ShirleyDot Nov 19, 2025
I will look into that soap!
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Yes, my mom developed a stale smell. Once we got her into a care home, she was bathed regularly and her clothes were washed properly and the smell completely went away. Mom was not good about taking her clothes out of the wash and getting them into the dryer and I think they were starting to mildew and she just ignored it. She also was not taking enough showers I'm sure before we had her placed.
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Reply to JustAnon
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Yes! My mom is also 90 and for a couple days, she had a “sulfur” smell around her. From what I could tell, it was coming from her mouth. After the tech couldn’t draw blood for a test on her because she was dehydrated, it clicked maybe that was the reason for the sulfur smell. After that, fluids were pushed and mouth washed thoroughly (more so than usual) and haven’t had that smell since.
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Reply to Elderlymomcare
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I watched a video last week of a husband and wife discussing this very thing. However, they relate it to his dementia, because he is not a senior citizen. They decided to be very public after he was diagnosed with dementia, so they have a YouTube channel called "Living With Dementia." I linked the video with where this topic starts.

https://youtu.be/-6MFBHVVWLY?si=FC7sEHuFnVwOGpHt&t=603
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Angst74 Nov 23, 2025
Thank you for the link. They are an engaging couple, and I've now subscribed to their channel.
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I have noticed that in my 92-year-old mother, too. Just a strange smell. Not urine. Not feces. I thought maybe it was her cancer but form what I've read, that doesn't happen, although I have always had a nose that smells things other don't.
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Reply to pmalemes
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ShirleyDot Nov 23, 2025
I am also a super-smeller: a blessing and a curse!

Her clothes are laundered for her, and she still does some laundry herself, so it is definitely something changing in her body because it is recent. I was just wondering if this was a signal of her demise since it seems new and she feels fine, she's just losing more weight.
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No worries it’s typical as we age. It’s probably Nonenal oil (see below). Arm & Hammer Oxyclean with Odor Blasters laundry detergent should do the trick for her clothes and of course a warm soapy shower/bath now and again. 👍

Nonenal is a chemical compound that is a key cause of the "old people smell," a natural body odor associated with aging. It forms when the skin's natural oils, specifically omega-7 unsaturated fatty acids, are broken down through oxidation, a process that speeds up as the body ages and natural antioxidants decrease. This compound has a distinct greasy, grassy, or musty scent that is not a sign of poor hygiene.
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Reply to MeNDad
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You could be right.
I was curious and once Googled, Old People Smell. Because I was genuinely interested in why older people tend to have this "musty" odor. I thought maybe it was something that happens within the body.
Here's what I learned, and I now understand:
As people age, we tend to be less attentive to hygiene. It could be because of mobility issues, or we are just tired, or lose motivation.
Unwashed hair, unwashed skin, skin oils, sweat, dirt, and especially private parts not cleaned thoroughly. A combination of all of those can present as an odor, which is not obviously identifiable, but now that I think about it, I can see how not thoroughly cleaning can lead to some musty odors. The smell reminds me of a hair grease which was popular in the 50s-60s.
She may be showering, but not thoroughly cleaning, and not daily, so the musty odors develop.
Having some disposable pre-moistened wipes in the bathroom can help.
Cleansing the privates after using the toilet, and using them on especially sweaty areas, such as around the neck and underarms, and breasts for women, can help.
Also, clothes need to be washed after one wearing. If they get in a habit of wearing the same clothes day after day, those clothes are going to pick up all the cooking odors in the air, and sweat and skin oils, and just not smell fresh. For someone in a diaper, anything that is in proximity to the diaper will retain a smell.
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Reply to CaringWifeAZ
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My 90 something year old father had dementia and refused to shower no matter what we did. This went on for over a year. He went into a NH eventually. The smell was musty and sweaty. When the weather was hot it became worse and could make you gag it was so bad.

It was not possible to get the odor out of the house. It just lingered no matter what you did. We sold the house last year but I bet ithe odor is still there and the new owners are wondering what it is.
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Reply to Hothouseflower
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Its an "old persons smell" as MeNDad said. I was told to use deoderant soap on my Mom.
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