Research
Mixed
Spirulina supplementation significantly reduces body weight, BMI, and body fat percentage in adults, with effects being dose- and duration-dependent.
Take 2 grams or more of Spirulina daily for at least 12 weeks. This intervention is most effective for obese individuals or those over 40. It works best as part of a broader weight management strategy, leveraging its high protein content to aid satiety.
GoodSupportsHIGH confidence
The pooled analysis of 17 RCTs indicated that Spirulina supplementation significantly reduced body weight (BW) (WMD: -1.07 kg; p = 0.004), body mass index (BMI) (WMD: -0.40; p = 0.025), body fat percentage (BFP) (WMD: -0.84%; p = 0.002)... A significant dose–response effect on BMI and intervention dose (Coefficient: -0.17, P = 0.007) and duration (Coefficient: 0.13, p = 0.042).
Why this rating
GRADE assessment rated BW and BFP as 'High' quality and BMI/WC as 'Moderate' quality.
Source
Effects of spirulina supplementation on body composition in adults: a GRADE-assessed and dose–response meta-analysis of RCTs
Mohammadyasin Lak et al. · Nutrition & Metabolism · 2025
Meta-analysis · 17 studiesCited 5×
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