Please assess the completion status of the following clinical trial:

Trial Title: Ca:Mg Ratio and Cognitive Function

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: PREVENTION
- Time Perspective: None
- Masking: TRIPLE
- Phase: None
- Number of Arms: 2.0

Eligibility Criteria:
Inclusion Criteria:~1. Participants from our parent study (Personalized Prevention of Colorectal Cancer Trial, NCT#01105169, IRB#100106);~2. Participants who completed the MoCA~Exclusion Criteria:~1. Participants did not provide their blood samples in the parent study.

- Gender: ALL
- Minimum Age: 40 Years
- Maximum Age: 85 Years
- Healthy Volunteers: t

Study Arms:
- magnesium treatment (Type: ACTIVE_COMPARATOR): Participants will be assigned to magnesium glycinate
- placebo (Type: PLACEBO_COMPARATOR): Participants will be assigned to placebo group

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