The study involves the evaluation of 3 groups of subjects (3-arm study). Patients diagnosed with BPPV and "sufficient" serum concentrations of Vitamin D (>30 ng/mL, >75 nmol/L) at baseline may be treated with 2 tablets per day (morning and evening) of Vertistop® L ( Alpha-lipoic acid, carnosine, zinc and curcumin) or untreated, on the basis of the randomization criterion to which they will be assigned. Patients with Vitamin D "deficiency" (<20 ng/mL, <50 nmol/L) or Vitamin D "insufficient" (20-30 ng/mL, 50-75 nmol/L) at baseline, or subsequent follow-up, they will be treated for 2 months with Vertistop® D (alpha-lipoic acid, carnosine and zinc, vitamin D3 and vitamins of the B complex) taking 1 tablet a day (before meals).

The main purpose of the study is to evaluate, over a period of 6 months, the efficacy of Vertistop® D and Vertistop® L supplementation in preventing recurrences of BPPV (Benign Paroxysmal Positional Vertigo), in relation to blood levels of Vitamin D.

Patients will be assigned to one of the three study groups following a randomization list with reference to groups 1 and 2 and according to the serum concentrations of 25(OH) Vitamin D, evaluated at the baseline visit, with reference to group 3.

The determination of the Vitamin D concentration will be requested by the Investigating physician and the report will be evaluated during the randomisation visit (V1), Visit 2, (after 2 months from enrollment/start of treatment), Visit 3 (Follow-up visit up to 4 months from enrollment) and finally Visit 4 (Follow-up visit 6 months after enrollment).

The blood sample and the Vitamin D dosage will be carried out the week before the day of the visit agreed with the Investigator, in a trusted laboratory of the patient, provided that it has the legal authorizations and the analytical methodology satisfactory the measurement intervals reported in Protocol.

Inclusion Criteria:

1. Patients of both sexes, aged between 18 and 85 years, diagnosed with primary BPPV.
2. Patients who have BPPV of the posterior semicircular canal (SPC) geo and apo, lateral semicircular canal (SLC) geo and apo (single-canal, multi-canal).
3. Patients with relapsing BPPV, defined as two or more episodes in the past six months, or three or more episodes in the last 12 months.
4. Patients able to understand and follow the requirements of the Study Protocol and to provide their informed consent.

Exclusion Criteria:

1. Patients under the age of 18.

2. Secondary BPPV. Other causes of possible high recurrence BPPV and/or massive otolithic detachment:

   • Migraine;
   • Meniere's or delayed endolymphatic hydrops;
   • Lindsay Hemenway syndrome;
   • Otological and/or dental implant surgery in the last 3 months;
   • Conclusion within 30 days.

3. Patients with Vitamin D values exceeding 100 ng/mL (>250 nmol/L).

4. Pregnant or lactating women, as reported by the patient.