Renal and Digestive Tolerance of a Food Supplement, Phytalgic, in Elderly Volunteers - A Multicentric Open Trial

Inclusion Criteria: * 70 years old minimum * Satisfying general health judged by principal investigator * Pain and /or stifness associated with arthritis * Regular used of analgesics and/or non-steroidal anti-inflammatory drugs (NSAIDs) * Digestive tolerance biomarkers 1. ASAT : Men \< 150 UI/L - Women \< 100 UI/L 2. ALAT : Men \< 180 UI/l - Women \< 130 UI:l 3. Gamma GT Men \< 180 UI/l - Gamma GT Women \< 100 UI/l 4. Amylase \< 250 UI/l 5. Lipase \< 750 UI/l * Renal tolerance biomarker: Glomerular filtration rate (GFR)superior or equal to 60 mL /min / 1.73m3 - calculated with the "Modification of the Diet in Renal Diseases" formula Exclusion Criteria: * Inflammatory arthritis * Allergy to any constituents of the study drug * Types 2 diabetes * Not legally fit to participate * Any treatment able to modify determined biological parameters