Provita Nervine - This safe and non-addictive vegan formula synergistically combines the nervine herb California poppy with Hawthorn berry. Nervines are herbs that specifically helps support the nervous system. One of the most commonly used nervine herb is California poppy. A study carried out in France concluded that there is a complementary effect of California poppy and Hawthorn berry; the study found that anxiety modifies cardiac rhythm which can then be controlled by a good Hawthorn berry source.