Saffron is a spice derived from the stigmas of the flowers of the Crocus sativus, commonly known as the "saffron crocus. Studies have shown various extracts of saffron to be safe and effective for boosting mood, with the additional benefit of calming feelings of anxiety, with minimal side effects. Saffron may enhance libido and improve erectile dysfunction and may be beneficial for those suffering from antidepressant and diabetic-related sexual dysfunction. Saffron may help treat PMS symptoms. A study of women ages 20-45 experiencing symptoms of PMS found that 30 mg saffron daily was more effective than placebo at treating PMS symptoms.