Please assess the completion status of the following clinical trial:

Trial Title: Hyperglycemia and Oxidative Stress in the Human Brain With Diabetes

Study Design Characteristics:
- Allocation: NON_RANDOMIZED
- Intervention Model: SINGLE_GROUP
- Observational Model: None
- Primary Purpose: BASIC_SCIENCE
- Time Perspective: None
- Masking: NONE
- Phase: None
- Number of Arms: 1.0

Eligibility Criteria:
Inclusion Criteria:~* Good health except for having type 2 diabetes~* Being treated with diet, insulin, or oral hyperglycemic agents~* Male or non pregnant female~* Non-smoker~* HbA1c 8 or above~* Able to provide informed consent~Exclusion Criteria:~* Presence of mental illness~* Co-existing chronic inflammatory condition or neurological disease or diseases associated with abnormal glutathione metabolism~* BMI over 35~* Smoker

- Gender: ALL
- Minimum Age: 30 Years
- Maximum Age: 55 Years
- Healthy Volunteers: f

Study Arms:
- Vitamin C (Type: EXPERIMENTAL): 2 gms vitamin C

Based on this trial design, predict the completion outcome and termination type (if applicable).