Please assess the completion status of the following clinical trial:

Trial Title: Vitamin D for Chemoprevention

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: SINGLE_GROUP
- Observational Model: None
- Primary Purpose: PREVENTION
- Time Perspective: None
- Masking: QUADRUPLE
- Phase: PHASE1
- Number of Arms: 4.0

Eligibility Criteria:
Inclusion Criteria:~* Between the ages of 30 and 80 years~* Comfortable communicating in English~* Currently has a primary care physician~* Willing to discontinue vitamin D or calcium supplements~* Willing to have all protocol specific tests run~Exclusion Criteria:~* Plans on taking a vacation or travel to a sunny region within 3 months of vitamin supplementation period except for a short period (i.e. 1 weekend)~* Pregnant or breast feeding or planning on becoming pregnant in the following year~* Pre-existing calcium (including hypercalcemia), parathyroid conditions (including hyperparathyroidism), sarcoidosis~* No concurrent active malignancies (other than non-melanoma skin cancer) or previous diagnosis of prostate cancer~* Cognitively impaired~* Active thyroid disease (e.g. Graves, Hashimoto's or thyroiditis)~* History of nephrolithiasis, chronic liver disease, chronic renal disease, or renal dialysis

- Gender: ALL
- Minimum Age: 30 Years
- Maximum Age: 80 Years
- Healthy Volunteers: t

Study Arms:
- 1 (Type: ACTIVE_COMPARATOR): No Vitamin D
- 2 (Type: ACTIVE_COMPARATOR): 1000 IU of Vitamin D
- 3 (Type: ACTIVE_COMPARATOR): 2000 IU of Vitamin D
- 4 (Type: ACTIVE_COMPARATOR): 4000 IU of Vitamin D

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