Black seed (Nigella sativa) and blood sugar
What 2 graded rows on black seed (nigella sativa) agree on for blood sugar, and where they differ. Counted side by side, never averaged.
Consensus finder Rows from the Black seed (Nigella sativa) page, reviewed Oct 21, 2026 How it decides
What the rows agree on
Each block and row is one graded row from the Black seed (Nigella sativa) page, with its PubMed record.
Your question
Black seed (Nigella sativa) and blood sugar
2 rows · 1,562 peopleThey agree: both rows found an improvement.
- BGrade B× 1
- DGrade D× 1
- Rows
- 2
- Trials
- 23
- People
- 1,562
- Pooled reviews may count some twice
What the rows share
From the rowsThe best-graded row, grade B, is a meta-analysis of 1,519 people (2026) and found an improvement.
The rows run from 43 to 1,519 people, published from 2021 to 2026: 1 pooled review and 1 single study.
The rows
2 improved- BGrade BFasting glucose and HbA1c in metabolic disease · Improved
Meta-analysis, 22 studies · n 1,519 · 2026 · Adults with metabolic diseases such as type 2 diabetes or obesity, in 22 trials reporting fasting glucose
Not stated in the abstract · Not stated in the abstract
Fasting glucose fell 18.62 mg/dL (95% CI −23.30 to −13.95) and HbA1c 0.56 points (95% CI −0.79 to −0.33) versus control; insulin and HOMA-IR did not change.
Row on the Black seed (Nigella sativa) page · PubMed 41858302 (opens PubMed)
- DGrade DBlood sugar, lipids and blood pressure in type 2 diabetes · Improved
RCT · n 43 · 2021 · Adults with type 2 diabetes
1,000 mg/day · 8 weeks
Fasting glucose, HbA1c, total and LDL cholesterol, triglycerides, waist and blood pressure fell versus sunflower-oil placebo; HOMA-IR and HDL did not change.
Row on the Black seed (Nigella sativa) page · PubMed 34142392 (opens PubMed)