Table 1.
The list of obtained NS preparations and their thymoquinone concentration.
| NS Preparation | Type of extract | Thymoquinone concentration (w/w) % |
|---|---|---|
| Extract 1 | 100% Ethanol | 0.4% |
| Extract 2 | 80% Ethanol: 20% Water | 0.01% |
| Extract 3 | 60% Ethanol: 40% Water | 0.04% |
| Extract 4 | 30% Ethanol: 70% Water | 0.005% |
| Extract 5 | 100% Water | <0.005% |
| Extract 6 | 100% Boiled water (30 min boiling) | Not detected |
| Extract 7 | Super critical fluid (SCF) extract (Sami Labs Ltd., India) | 2.4% |
| Extract 8 | Cold pressed NS oil capsules (The Blessed Seeds, United Kingdom) | 0.6% |
| Extract 9 | Cold pressed NS oil capsules (Sanct Bernhard, Germany) | 0.2% |
| Extract 10 | Cold pressed NS oil capsules (Marnys S.A., Spain) (A licensed herbal product in Saudi Arabia) | 0.7% |
Extracts 1 to 6 are laboratory prepared. Extracts 7–10 are ready-made commercial products.