Efficacy and Tolerance Evaluation of an Amino Acid Food Supplement

Inclusion Criteria: * female sex, * 35-70 years, * skin phototype II and III according to Fitzpatrick's classification (see par. 8.2.1) * accepting to not change their habits regarding food, physical activity, body cosmetic and cleansing products; * accepting not to expose their body to strong UV irradiation (UV session, or sun bathes) during the entire duration of the study; * accepting to sign the informed consent form. Exclusion Criteria: * Pregnancy; * lactation; * smokers; * alcohol or drug abusers; * skin phototype I, IV, V and VI according to Fitzpatrick's classification * subjects not in menopause who do not use adequate contraceptive precautions in order to avoid pregnancies during the study; * subjects not in menopause who do not accept to perform the pregnancy test at T0 and at the end of the study (T1M); * Body Mass Index (BMI) variation (± 1) during the study period; * change in the normal habits regarding food, physical activity, body cosmetic and cleansing use during the month preceding the test; * sensitivity to the test product or its ingredients (to be assessed by the investigator during the baseline visit); * subjects whose insufficient adhesion to the study protocol is foreseeable; * participation in a similar study currently or during the previous 6 months; * dermatitis; * presence of cutaneous disease on the tested area, as lesions, scars, malformations; * clinical and significant skin condition on the test area (e.g. active eczema, psoriasis, severe rosacea, scleroderma, local infections and severe acne); * diabetes; * endocrine disease; * hepatic disorder; * renal disorder; * cardiac disorder; * pulmonary disease; * cancer; * neurological or psychological disease; * inflammatory/immunosuppressive disease; * drug allergy; * anti-inflammatory drugs, anti-histaminic, topic and systemic corticosteroids, narcotic, antidepressant, immunosuppressive drugs (with the except of contraceptive or hormonal treatment starting more than 1 year before the study); * using of drugs able to influence the test results in the investigator opinion.