Clinical Trial to Evaluate Magtein in Older Adults

Inclusion Criteria 1. Subject is aged 45 to 70 years 2. Subject weighs between 50 and 100 kg. 3. Subject complains of having changes in their memory and concentration abilities. 4. Subject scores ≥ 12 and ≤ 28 on the Hamilton Anxiety Rating Scale (HAM-A) 5. Subject scores \> 5 on the Pittsburgh Sleep Quality Index (PSQI) 6. Subject scores ≥ 24 on the Mini-Mental State Examination (MMSE) for the purpose of ruling out dementia and Alzheimer's disease 7. Female subject is surgically sterile, post-menopausal or agrees to use an acceptable method of birth control as defined in section 2.6. 8. Subject agrees to stop taking any vitamins, minerals, or dietary/herbal supplements he/she is currently taking at least 7 days prior to randomization and to not take any vitamins, minerals or dietary/herbal supplements other than the study product until after study completion. 9. Subject is willing and able to comply with the protocol including: * attending 4 visits, each of which are about 3 hours long; * not drinking alcohol or exercising for the 24 hours prior to the visits; * and not taking any vitamin, mineral, dietary or herbal supplements throughout the study. 10. Subject is able to understand and sign the informed consent to participate in the study. Exclusion Criteria 1. Subject has any of the following medical conditions: * active heart disease * uncontrolled high blood pressure (≥ 140/90 mmHg) * renal or hepatic impairment/disease * Type I or II diabetes * bipolar disorder * Parkinson's disease * Alzheimer's disease * dementia * unstable thyroid disease * diagnosed major affective disorder * psychiatric disorder (hospitalized in the past year) * immune disorder (such as HIV/AIDS) * any medical condition deemed exclusionary by the Principal Investigator (PI) 2. Subject has a history of cancer (except localized skin cancer without metastases or in situ cervical cancer) within 5 years prior to screening. 3. Subject is currently taking calcium channel blockers, SSRI's or anxiolytics other than benzodiazepines as needed, with "as needed" defined as less than 5 times per month. 4. Subject is currently taking any medications that are known to interact with magnesium (see section 2.5.2). 5. Subject is currently taking antibiotics as the study product may reduce the absorption of antibiotics. A washout period of 2 weeks is allowed. 6. Subject is on an unstable dose of medication (defined as fewer than 90 days at the same dose). 7. Subject is currently taking any medication deemed exclusionary by PI. 8. Subject has an allergy or sensitivity to any ingredient in the test product (see section 3.2.1). 9. Subject exhibits evidence of hepatic or renal dysfunction as evidenced by ALT, AST, AP being ≥ 2 times the upper limit of normal or serum creatinine value ≥ 2.0 mg/dl or other clinically significant abnormal clinical laboratory value per PI discretion. 10. Subject has a history of drug or alcohol abuse in the past 12 months. 11. Subject has begun/stopped smoking ≤ 6 months ago OR has plans to begin/quit smoking. 12. Subject is pregnant, lactating, or planning to become pregnant during the study period. 13. Subject has any condition or abnormality that, in the opinion of the investigator, would compromise the safety of the subject or the quality of the study data. 14. Subject is participating or has participated in another research study within 30 days prior to the screening visit \-