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Spirulina may be helpful for sleep

An RCT in patients with ulcerative colitis1 randomised patients to two 500 mg tablets per day of spirulina (Arthrospira platensis) or placebo for 8 weeks.

There were 40 patients in each group and significant benefits were found in reduced sleep disturbance and improved stress status and quality of life.

There was no benefit in anxiety, depression, fatigue scores or blood pressure.