It could be their diet causing the problem. I worked with a woman who was very well groomed, and, AFAIK, showered regularly. However, her family’s diet apparently included enough garlic to choke a Gilroy farmer.
In spite of her bathing and grooming habits, she almost always reeked of garlic, practically oozing from her pores. We worked in the same group, but not she and I sat far enough away from each other that the odor seldom bothered me. Still...!
On the plus side, garlic repels parasites, so they’ll not be carrying ticks or fleas.
Had an ex-SIL who was/is a hippie/enviro nut/natural type who cooked with lots of garlic...LOTS...In everything...
She was a sweet kid, took care of herself, but she always smelled like a freshly crushed garlic clove...Clothes, breath, hair...
“Oozing from pores” describes it very well...
Eating large amounts of garlic (or any other strong smelling stuff) will make itself known on your body. Years ago, I worked at a daycare, and a little boy and his parents all reeked of what I later identified as transmission fluid. I’m guessing the husband must have worked around the stuff, and the mom must have washed all their clothing together. It was so strong, I could hardly breathe around it. When people are immersed in any odor, their sense of smell becomes accustomed to it, and they, themselves, can’t smell it anymore.