A single mom in West Virginia grows her own snacks, but it’s not what you think … because she says she’s addicted to eating her own toenails.

TMZ has an exclusive sneak peek from tonight’s episode of “My Strange Addiction” … and it features Janet from Hedgesville, WV … she literally chews her nails off her toes.

Janet says she eats over 60 nail clippings every single week … and sometimes, when her chompers encounter a really crunchy one, she saves it for later in a special jar … getting it extra crunchy.

For Janet, chewing and eating toenails is especially fulfilling after a sweaty workout … she slips off her shoes and puts her foot in her mouth to bite off a salty morning snack.

Seems Janet’s feet are finger toenail-lickin’ good.