Vagnerova specialises generally in geriatric nutrition, especially nutrition issues in sarcopenia, geriatric frailty, palliative care, cachexia and wound healing. She also co-works on a stroke unit (ICU), neurology and post-stroke rehabilitation department, which are closely connected to geriatrics.

Since 2019, Vagnerova is an assistant professor at the Geriatric Clinic in Prague and lectures in clinical nutrition at the Charles University First Faculty of Medicine. Vagnerova is, furthermore, a member of the Executive Committee at the Czech Association of Dietitians.