, one of the uk's strongest & many more times stronger than culinary sage, highest grade extract that has a guaranteed level of 2.5% rosmarinic acid, convenient one-a-day taste-free tablets remember our promise – ‘notice the difference or your money back'this charming kitchen herb has been used by herbalists for centuries for a number of conditions. more recently sage has become popular as a supplement for the menopause a use supported by some studies. interestingly the word 'sage' is also linked to wisdom & this herb has been investigated for its influence on memory. a recent study showed that sage was able to improve alertness & produce a positive effect on mood in some of the participants in the study.nature’s best® sage extract is one of the uk’s strongest & many times more concentrated than culinary sage. we insist on a high-grade sage extract that has a guaranteed level of 2.5% rosmarinic acid (the 'active' compound in sage). remember our promise – ‘notice the difference or your money back’