## 3 Results and Discussion
Comparing the present study with the previous one, where extraction with pure water was not tested [5], it can be seen that the hydration of the _H. perforatum_ sample, during extraction by water, decreases the future re-extraction of tocopherols and tocotrienols. The recovery of all tocochromanols was directly proportional to the concentration of ethanol used; however,  
\begin{table}
\begin{tabular}{l c c c c c c c} \hline \hline \multirow{2}{*}{**Tocols**} & \multirow{2}{*}{ \begin{tabular}{c} **H. _perforatum_** \\ **Powder** \\ \end{tabular}  } & \multicolumn{2}{c}{**H. _perforatum_ Tea Residues Extracted by Different Hydroethanolic (\(\underline{\underline{\mathbf{r}}}\)/\(\underline{\mathbf{\mathbf{v}}}\)) Solutions**} \\ \cline{2-9}  & & **50.0\%** & **60.0\%** & **70.0\%** & **80.0\%** & **90.0\%** & **96.2\%** \\ \hline \(\alpha\)-T & 22.29 \(\pm\) 0.75  & 7.08 \(\pm\) 0.83  & 10.75 \(\pm\) 0.55  & nd & nd & 0.15 \(\pm\) 0.03  & 0.53 \(\pm\) 0.05  \\ \(\gamma\)-T & 5.86 \(\pm\) 0.05  & 0.65 \(\pm\) 0.05  \\ Total Ts & 29.94 \(\pm\) 1.25  & 10.75 \(\pm\) 1.25  & 15.75 \(\pm\) 0.82  & nd & nd & 0.06 \(\pm\) 0.01  & 0.16 \(\pm\) 0.01  & 0.50 \(\pm\) 0.04 [FOOTNOTE:]Footnote : Values are expressed as the means \(\pm\) standard deviations (\(\underline{\mathbf{r}}\) = 3). Different letters in the same line indicate statistically significant differences at \(\underline{\mathbf{r}}\) \(<\) 0.05. [ENDFOOTNOTE] \\ \(\gamma\)-T & 5.86 \(\pm\) 0.05 [FOOTNOTE:]Footnote : Values are expressed as the means \(\pm\) standard deviationsan inhibition of tocochromanol recovery can be clearly observed at a concentration of 90% hydroethanolic solutions, especially fortoctirenols (Figure 3). For each ethanol concentration, the recovery was proportionally higher fortoctirenols than fortocpherols. The same tendency was observed duringtocochromanol extraction from the seeds of different crossbreeds of grape [26]. This phenomenon can be attributed to the relatively higher polarity oftoctirenols (characterized by an unsaturated carbon chain) compared withtocpherols (which possess a saturated carbon chain). The polarity oftocchromanols is further influenced by the number and positioning of methyl substituents on the chromanol ring [26]. This characteristic oftocchromanols explains the highest recovery of the \(\delta\) homologue resulting in 79% of \(\delta\)-T3 and 77% of \(\delta\)-T extractability by the 96.2% hydroethanolic solution. Nevertheless, aspects such as strong binding/interactions of individualtocchromanols in conjunction with the plant matrix, the occurrence oftocchromanol esters, and losses during saponification can affect the obtained differences [26]. Those factors could explain the relatively low recovery of \(\beta\)-T3 and \(\gamma\)-T3 (40% and 38%, respectively) of all tested hydroethanolic solutions. This aligns with the United Nations Sustainable Development Goals (SDGs), particularly Goal 12--Responsible Consumption and Production. According to its definition, sustainable consumption and production is a concept that involves the efficient use of natural resources, minimizing negative environmental impacts and supporting quality of life for both current and future generations. It is based on the responsible creation and use of products, considering their life cycle and striving to reduce waste and pollution [30; 31]. Resource recovery and utilization are essential components of sustainable waste management. Residues from St. John's wort infusions hold significant potential for vaporization through the application of innovative, eco-friendly extraction technologies. These processes facilitate the extraction of valuable lipophilic phytochemicals, which have broad applications in the agro-food and pharmaceutical industries. Ultrasound-assisted extraction (UAE) is an efficient technique for extracting bioactive compounds from plant sources and offers numerous advantages over traditional solvent-based extraction methods [32].