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The purpose of this study is to assess the effectiveness of antioxidant supplementation in idiopathic tinnitus patients.
To investigate this, a double-blind, randomized, and placebo-controlled clinical trial was conducted to assess the impact of a multivitamin-multimineral supplement with phytochemicals combined with a-lipoic acid supplements on serum oxidative stress, serum antioxidant capacity and tinnitus parameters in patients with idiopathic tinnitus.
Subjective, idiopathic, non-pulsatile tinnitus ("tinnitus") is perception of sound without the presence of an external acoustic stimulus. Causes of idiopathic tinnitus remain unknown and the pathological mechanisms are not fully understood. Currently, effective therapies for tinnitus remain limited. Previous research has demonstrated that oxidative stress is possibly involved in the pathogenesis of idiopathic tinnitus and some studies have shown beneficial effects of antioxidant therapy in tinnitus patients. Moreover, many studies have shown the beneficial effect of antioxidant supplementation on the reduction of oxidative stress and the increase of endogenous antioxidant enzymes and antioxidant capacity.
Seventy patients with idiopathic tinnitus were enrolled based on certain inclusion and exclusion criteria. Subsequently, they were informed regarding the aims, methods, anticipated benefits, and potential hazards of the study, and were provided with the information leaflet of the study. Each patient who agreed to take part in the study, signed an informed consent form, a copy of which was given to them.
Participants were allocated to either antioxidant or placebo group. Randomisation was conducted by someone who was not involved in the study and blinding was strictly maintained to researchers and participants.
The antioxidant group received one multivitamin and multimineral tablet with grape seed extract once a day together with one tablet of alpha-lipoic acid twice a day, whereas the placebo group received identical placebo tablets. The intervention lasted 3 months. Both groups kept their usual medical treatment and their diet and exercise habits stable during the intervention.
Patients were assessed after randomisation according to the following tools:
- Medical history
- Audiometric and Tinnitus assessment: Basic audiometric tests, pitch match, loudness match, minimum masking level (MML)
- Tinnitus questionnaires: Tinnitus Handicap Inventory (THI), Tinnitus Functional Index (TFI) and Visual Analogue Scale (VAS)
- anthropometrics: body weight , height, Body Mass Index, waist and hip circumferences
- Nutrition and physical activity evaluation
- Adherence to the Mediterranean dietary pattern (MedDietScore)
- Psychological assessment
- Biochemical measurements: Complete blood count, lipid profile, glucose, electrolytes, liver enzymes, thyroid hormones
- Vitamin laboratory tests
- Oxidative stress assessment in serum samples: Total Antioxidant Capacity (TAC), Superoxide Dismutase (SOD) activity and Oxidized LDL are quantified.
Compliance and any side effects were checked with a weekly telephone contact with the patients. The consumption of tablets was checked with a diary completed by patients. At the end of the intervention, all baseline parameters were assessed.
General Hospital of Athens "Hippocratio", Department of Otorhinolaryngology
National and Kapodistrian University of Athens
Published on BioPortfolio: 2019-10-01T07:54:56-0400
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