Table 3.
Antioxidant activity of essential oil and hydro-alcoholic extracts of H. officinalis subsp. aristatus (IC50 ± standard deviation and concentration range).
| Extracts and Compounds | DPPH IC50 (μg/mL) | ABTS IC50 (μg/mL) | Concentration Range (μg/mL) |
|---|---|---|---|
| CIV17-EO | / | / | 0.156250–10,000.00 |
| NAV19-EO | / | / | 0.156250–10,000.00 |
| CdG19-EO | 7652.95 ± 478.91 | 518.90 ± 23.79 | 0.156250–10,000.00 |
| Thymol | 357.56 ± 34.70 | 12.01 ± 0.73 | 0.015625–1000.00 |
| CIV17-UAE | 39.31 ± 1.53 | 10.79 ± 1.21 | 0.781250–100.00 |
| NAV19-UAE | 51.71 ± 2.63 | 20.15 ± 0.57 | 0.781250–100.00 |
| CdG19-UAE | 45.86 ± 3.04 | 17.19 ± 0.39 | 0.781250–100.00 |
| Rosmarinic acid | 4.31 ± 0.54 | 1.85 ± 0.03 | 0.781250–100.00 |
| Chlorogenic acid | 7.29 ± 0.17 | 4.00 ± 0.09 | 0.781250–100.00 |
| Caftaric acid | 6.89 ± 0.94 | 3.86 ± 0.09 | 0.781250–100.00 |
| Trolox | 5.97 ± 0.22 | 2.70 ± 0.05 | 0.781250–0.781250 |
EO and hydroalcoholic extracts (UAE) of H. officinalis subsp. aristatus obtained by the sample harvested in: September 2017, Civitaretenga (CIV17); September 2019, Navelli (NAV19); October 2019, Campo di Giove (CdG19).