Fucoidan and blood sugar
What 3 graded rows on fucoidan agree on for blood sugar, and where they differ. Counted side by side, never averaged.
Consensus finder Rows from the Fucoidan page, reviewed Oct 21, 2026 How it decides
What the rows agree on
Each block and row is one graded row from the Fucoidan page, with its PubMed record.
Your question
Fucoidan and blood sugar
3 rows · 167 peopleSplit. 1 row found an improvement, 1 found no difference and 1 had mixed results.
- CGrade C× 1
- DGrade D× 1
- ∅No effect× 1
- Rows
- 3
- Trials
- 3
- People
- 167
Where they differ
From the rowsThe best-graded row, grade C, is a randomized trial of 70 people (2025) and found an improvement. 1 row is graded No effect, our grade for adequately powered trials that found no effect.
The row that found an improvement is newer (2025) than the row that found no difference (2019).
1 row with mixed results is left out of this comparison.
The rows
1 improved · 1 no difference · 1 mixed- CGrade CBlood sugar and inflammation in prediabetes · Improved
RCT · n 70 · 2025 · 70 Chinese adults with prediabetes
1000 mg a day · 12 weeks
Glycated serum protein rose less and TNF-α, IL-6 and LPS fell compared with placebo (P < 0.05); Megamonas and Blautia rose and Klebsiella fell in the gut.
- ∅No effectInsulin resistance in obese adults · No difference
RCT · n 72 · 2019 · Obese adults without diabetes in Tasmania (35 fucoidan, 37 placebo)
500 mg twice daily · 90 days
No differences in any 90-day outcome; mean HOMA change was 0 on placebo and -0.1 on fucoidan (p = 0.73).
- DGrade DInsulin secretion, blood pressure and LDL in overweight adults · Mixed
RCT · n 25 · 2014 · 25 overweight or obese volunteers in Mexico (13 fucoidan, 12 placebo)
500 mg once daily before breakfast · 3 months
Diastolic blood pressure (71.7 to 67.8 mmHg) and LDL cholesterol (3.1 to 2.7 mmol/l) fell, while insulin, HOMA beta-cell and HOMA-IR (1.9 to 2.6) rose after fucoidan.