Please assess the completion status of the following clinical trial:

Trial Title: Efficacy of a Spirulina Supplement for Amelioration of Benign ThYroid Nodules

Study Design Characteristics:
- Allocation: NON_RANDOMIZED
- Intervention Model: CROSSOVER
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: DOUBLE
- Phase: None
- Number of Arms: 2.0

Eligibility Criteria:
Inclusion Criteria:~* euthyroid adults (normal TSH)~* no criteria for malignancy is present (size, fine needle aspiration, lymph nodules)~* no other medication/supplement administered for thyroid, no steroids, beta-blocker~Exclusion Criteria:~* suspicion of malignancy / shown~* autoimmune disease~* abnormal thyroid function~* Wilson disease~* contraception with intrauterine device

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: None
- Healthy Volunteers: f

Study Arms:
- Preparation with Spirulina (Type: ACTIVE_COMPARATOR): 6 weeks bid Preparation with Spirulina
- Placebo (Type: PLACEBO_COMPARATOR): 6 weeks bid Placebo

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