STRONG BLACK SEED OIL (100 mL with packaging) is 100% PURE POTENT BLACK SEED OIL FOR BOOSTING IMMUNITY - We\'re proud to offer the highest quality black seed oil anywhere in the world. Our oils purposely come in brown glass bottles, unlike some manufacturers who use plastic bottles. This helps to keep the temperature down and the light out. Typically, our STRONG oil is 4.3% to 4.9% of volatile oil, which is potentially 3-4 times more powerful than most oils in the market, and it also contains 2% thymoquinone which is twice as much as any other oils in the market.