Table 1. Overview of method section.
SLE: systemic lupus erythematosus; PMC: PubMed Central; MeSH: Medical Subject Heading; MEDLINE: Medical Literature Analysis and Retrieval System Online
| Serial number | Keyword and MeSH combined (last four used to narrow articles) | Database | Studies |
| 1 | SLE/Lupus/systemic lupus erythematosus | PubMed/PMC/MEDLINE | 160,804 |
| 2 | SLE/Lupus/systemic lupus erythematosus | Google Scholar | 672,000 |
| 3 | Curcumin | PubMed/PMC/MEDLINE | 32,744 |
| 4 | Curcumin | Google Scholar | 238,000 |
| 5 | Glutathione | PubMed/PMC/MEDLINE | 175,879 |
| 6 | Glutathione | Google Scholar | 1,080,000 |
| 7 | SLE/Lupus/systemic lupus erythematosus and Glutathione | PubMed/PMC/MEDLINE | 198 |
| 8 | SLE/Lupus/systemic lupus erythematosus and Glutathione | Google Scholar | 18,600 |
| 9 | SLE/Lupus/systemic lupus erythematosus and Curcumin | PubMed/PMC/MEDLINE | 42 |
| 10 | SLE/Lupus/systemic lupus erythematosus and Curcumin | Google Scholar | 9,530 |