This potent, immune-boosting superfood can help you lose weight by satisfying your appetite with nutrients instead of empty calories. Says a 2017 study published in the journal ‘BMC Complementary Medicine and Therapies’, 64 overweight people received 500mg of spirulina twice every day for 12 weeks at the end of which their body weight and BMI was much lower. Moreover, their appetite was significantly reduced. Spirulina as a fat-buster has been much studied and different theories are offered: One theory is that its high content of phenylalanine affects the hypothalamus, the nerve cells that, when activated, produce hunger. Another theory is that spirulina raises blood sugar levels enough to cause the hypothalamus to suppress hunger pangs. Widely available online in the form of powder or capsules, spirulina has been recommended for the prevention of obesity and obesity-related disorders.