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Sage belongs to the Salvia plant family – derived from the Latin word salvere which means, “to heal.” To heal, indeed.

Sage (Salvia officinalis and Salvia lavandulaefolia) is a delicious cooking and culinary herb. But it has also been used for thousands of years for a variety of ailments.

This beautiful plant with its blue flowers grows wild in many continents. This includes North America. But it is native to the Southern Europe and the Mediterranean region.

Sage used for numerous conditions

For thousands of years, sage has been used in Greek and European medicine to treat a myriad of conditions. These range from intestinal problems to lung and airway conditions, heart disease and circulation problems. It has been used to treat inflammatory issues and low immune function. Sage has also been used to treat oral, sinus and lung infections. We have discussed evidence for sage essential oil for tonsillitis.

Traditional uses for sage have also uncovered another benefit: The ability to boost moods and increase memory and cognitive skills. This benefit isn’t just after weeks or months of dosing: It also occurs within hours of consuming the sage.

This last benefit of sage has been the subject of intense research over the past decade. With proven results.

Sage’s cognitive benefits

In 2016, scientists from Australia’s Murdoch University investigated the evidence for sage’s ability to boost cognition.

Sage has been tested in a number of laboratory situations, on both cells and animals. Human studies and laboratory research have revealed that sage exhibits several important brain benefits:

• Strong anti-inflammatory. This helps protect the brain against free radical damage and oxidative stress.

• Blocks and repairs damage to brain cells related to the formation of amyloid-beta plaque.

• A potent inhibitor of cholinesterase.

• Helps protect brain cell health by maintaining higher levels of brain-derived neurotrophic factor (BDNF).

Studies on single and long-term dosing

The discovery of these benefits have led scientists to test sage using human clinical research.

In a study from the UK’s Northumbria University, researchers gave 24 volunteers single doses of either sage essential oil or a placebo. The sage was given in either 25 or 50 microliter doses.

The researchers found that the sage essential oil doses resulted in an immediate cognitive boost for the subjects. They scored higher on mood ratings and cognitive task tests.

The researchers concluded:

“The results showed that administration of sage resulted in a consistent improvement for both the 25- and 50-microl dose on the ‘Speed of Memory’ factor. There was also an improvement on the ‘Secondary Memory’ factor for the 25-microl dose. Mood was consistently enhanced, with increases in self-rated ‘alertness’, ‘calmness’ and ‘contentedness’ following the 50-microl dose and elevated ‘calmness’ following 25 microliters. These results represent further evidence that Salvia is capable of acute modulation of mood and cognition in healthy young adults. The data also suggest that previous reports of memory enhancement by Salvia may be due to more efficient retrieval of target material.”

Another clinical study tested 42 men and women with mild cognitive impairment. They were given 60 drops of a sage extract or a placebo for four months. After the four months, the patients scored significantly higher on cognitive testing (ADAS-cog tests). The researchers also found the daily sage supplementation improved the moods and reduced agitation among the patients.

The researchers concluded:

“The results of this study indicate the efficacy of S. officinalis extract in the management of mild to moderate Alzheimer’s disease. Moreover, S. officinalis may well reduce agitation of patients but this needs to be confirmed.”

Researchers from New Zealand’s University of Otago tested Alzheimer’s patients with sage essential oil for six weeks. The researchers found the sage improved attention spans and reduced neuropsychiatric symptoms among the patients.

Getting the dose right

Researchers from Australia’s Swinburne University in Melbourne tested 20 adults who were over 65 years old. With periods in between, they were given different doses of the sage extract and tested for memory efficiency and cognitive function. The researchers found that those who received 333 milligrams of the sage extract benefited the most. Doses that were higher or lower also showed benefit, but not as much as 333 milligrams per day.

The researchers reported:

“Compared with the placebo condition (which exhibited the characteristic performance decline over the day), the 333-mg dose was associated with significant enhancement of secondary memory performance at all testing times. The same measure benefited to a lesser extent from other doses. There also were significant improvements to accuracy of attention following the 333-mg dose.”

University of Northumbria researchers also tested 30 healthy young adults. They gave them two different doses of dried sage leaf (300 milligrams or 600 milligrams) or a placebo. They were given mood assessment testing and cognitive tasking before and after one and four hours after a dose on three separate occasions.

The researchers found that both doses of dried sage leaf significantly boosted memory, mood and cognitive testing. Significantly, they found the volunteers had significantly better alertness, and were able to multitask better. Those taking the sage performed significantly better on Defined Intensity Stress Simulator (DISS) testing. DISS tests multitasking under stress. Those given the sage were calmer and more contented after the doses. The 600 mg dose resulted in better improvements.

The researchers reported:

“The results confirm previous observations of the cholinesterase inhibiting properties of S. officinalis, and improved mood and cognitive performance following the administration of single doses to healthy young participants.”

Sage aromatherapy works too

Researchers also tested 135 healthy adults were given sage aroma or no aroma and tested for cognition and memory. They also compared the effects of Salvia lavandulaefolia and Salvia officinalis. The study found both sage species resulted in improvement. However, the S. officinalis aromatherapy was better at boosting cognitive testing scores among the volunteers.

The researchers reported:

“Data analysis revealed that the S. officinalis aroma group performed significantly better than the control group on the quality of memory and secondary memory primary outcome factors from the test battery.”

The memory-boosting effects of the sage are specifically noted here. But we also find that some of sage’s cognitive tasking and brain protective effects are not as well conveyed from aromatherapy compared to ingesting the leaf or extracts.

Nonetheless, the researchers concluded:

“These findings suggest that the aromas of essential oils of Salvia species reproduce some but not all of the effects found following oral herb administration, and that interesting dissociations occur between subjective and objective responses.”


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