Inula Helenium: Reduces blood pressure and the levels of sugar in the blood. In effect, the solubility of oxygen in the blood increases and consequently the amount of the oxygen in the blood rises. This process maintains the vitality and flexibility of the blood vessels. Flexible blood vessels are one of the main factors for maintaining normal blood pressure.
Silybum Marianum: Contains Silymarin, an active material which cleans and rehabilitates the liver. Silymarin reduces fats in the liver and accordingly the liver regains its normal activity and proceeds to naturally reduce the cholesterol level in the blood. This process prevents arteriosclerosis, which is one of the causes for high blood pressure. By treating it with the Silybum Marianum plant we can prevent high blood pressure. The components of Silymarin also assist in protecting the normal function of the kidneys, which is as well an important factor for keeping a normal blood pressure.
Lemon Verbena: A soothing plant that has the taste of lemon. Used in order to add flavor to the formula.
Hibiscus- Contains Ascorbic Acid and Glycolic Acid. It also is used as a natural flavor.
The following is a summary of studies on the hibiscus plant also found in Preshonit Tea
Hibiscus and its effect on blood sugar levels, blood pressure and cholesterol : Scientific studies
Hibiscus, scientifically known as Hibisgus Sabdari, is a perennial shrub that includes over 200 species of plants with a wide and spectacular variety of colors, growing in warm, tropical and sub-tropical climates. It is the national flower of Haiti, Malaysia and South Korea, and many around the world use the various parts of the plant in a variety of dishes, beverages and especially in tea brews. Beyond its good taste, drinking an herbal brew with the hibiscus plant may also have positive health outcomes.
Drinking a hibiscus plant brew was tested in a study published in the Phytotherapy Research. This study is a meta-analysis, i.e., a statistical analysis that integrates data from a number of previous independent studies in order to draw a broader and more certain conclusion from them. The study examined the effect of drinking an hibiscus brew on blood lipid profile, fasting blood sugar and blood pressure, in 7 clinical studies that included a total of 362 subjects. The findings of the study showed that the hibiscus treatment caused a substantial and statistically significant decrease in sugar levels and systolic and diastolic blood pressure. In addition, the findings showed that the hibiscus treatment brought about a large decrease in LDL (low-density lipoprotein) values known as "bad cholesterol", although this effect was not statistically significant. Based on these findings, the researchers concluded that hibiscus consumption has a beneficial effect in controlling blood sugar levels and blood pressure values. 
Another study published in the journal Fitoterapia reviewed findings from controlled clinical trials that examined the effect of the hibiscus plant on a wide range of risk factors associated with cardiovascular disease. First, the researchers found that the hibiscus leaves are used in at least 10 countries around the world with no evidence of side effects. Second, findings from randomized controlled trials show that hibiscus treatment lowers systolic and diastolic blood pressure levels in people with hypertension. Third, in more than half of the randomized controlled trials, hibiscus leaves were also found to be effective in lowering bad cholesterol (LDL) and triglyceride levels, and in raising good cholesterol (HDL) levels. The most common explanation for these effects of the hibiscus plant is that it acts as an antioxidant and reduces the oxidation of bad cholesterol. Based on all of these findings, the researchers concluded that the hibiscus plant is a promising treatment for high blood pressure and cholesterol levels and encouraged further research on the subject.
 Najafpour Boushehri, S., Karimbeiki, R., Ghasempour, S., Ghalishourani, S.S., Pourmasoumi, M., Hadi, A., Mbabazi, M., Pour, Z.K., Assarroudi, M., Mahmoodi, M. and Khosravi, A., 2020. The efficacy of sour tea (Hibiscus sabdariffa L.) on selected cardiovascular disease risk factors: A systematic review and meta‐analysis of randomized clinical trials. Phytotherapy Research, 34(2), pp.329-339.
 Hopkins, A.L., Lamm, M.G., Funk, J.L. and Ritenbaugh, C., 2013. Hibiscus sabdariffa L. in the treatment of hypertension and hyperlipidemia: a comprehensive review of animal and human studies. Fitoterapia, 85, pp.84-94.