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| - Last Updated on November 29, 2024 by Dr Priyamvada
Quick Take
A social media post claims that sniffing rosemary can increase memory by 75%. Our fact check reveals this claim is mostly false.
The Claim
According to a post on Pinterest, “Scientists found sniffing rosemary can increase memory by 75%. Rosemary helps break down a brain chemical called ‘acetylcholine,’ which improves communication between nerve cells.”
Fact Check
Does rosemary improve memory?
Not really. While there is some evidence suggesting that rosemary might have cognitive benefits, the idea that it can boost memory by 75% is highly exaggerated. Some studies have found that rosemary can have a small effect on cognitive performance or short-term memory, but the impact is far from dramatic. Research has shown that the scent of rosemary might improve alertness or mental clarity, but nothing close to the dramatic 75% increase suggested in the claim.
We got in touch with Dr Sreenivas Meenakshisundaram, Consultant Neurologist, MGM Healthcare, Chennai, for his expert take on rosemary for memory boost. He says, “Rosemary has been called a memory herb for a long time. However, there has been little scientific evidence to support this claim. Multiple studies in animals, including rats, mice, and zebrafish, have shown improvements in cognition with regular intake of rosemary.”
Dr Meenakshisundaram adds, “But, these studies are small, and the effects are subtle. While this is a promising finding, we need to replicate these results in humans to be confident of any meaningful clinical benefit. It’s also fascinating that compounds from rosemary can enter the bloodstream through inhalation, but we still need larger, more rigorous research to confirm its true impact. For now, think of rosemary as a pleasant and aromatic herb that might give a small cognitive lift, but it’s no substitute for proven methods like staying mentally active, exercising, and eating a balanced diet.”
We have previously debunked a similar claim suggesting that dates boost memory.
Can rosemary impact acetylcholine?
Yes, it does, but not in the way the claim suggests. Rosemary contains compounds like rosmarinic acid, known for their antioxidant properties, which may support brain health. Rather than breaking down acetylcholine (as the claim suggests), rosemary helps prevent its breakdown. Acetylcholine is crucial for memory and concentration. Studies show that inhaling rosemary oil may help maintain acetylcholine levels. In one experiment, individuals exposed to diffused rosemary oil performed better on cognitive tasks, with improvements in speed and accuracy linked to longer exposure. Compounds from the oil were also detected in their blood, indicating absorption through inhalation. Additional research suggests rosemary may enhance brain function in older adults, including those with dementia or Alzheimer’s disease.
Is there scientific evidence behind this claim?
Yes, but it’s limited. Some small-scale studies have shown that the scent of rosemary might have a mild positive effect on cognition.
A 2022 review of studies found that rosemary extract improved cognitive performance in both healthy and cognitively impaired animals. Although variability in the results suggests more research is needed.
Similarly, a 2018 study with 79 students revealed that rosemary enhanced image and numeric memory, while lavender boosted image memory but weakened number recall. However, the small sample size means the findings cannot be applied broadly.
In a 2012 study with 28 older adults (average age 75), dried rosemary leaf powder was found to improve memory speed at a low dose (750 mg), while a higher dose (6,000 mg) impaired cognitive function. This suggests that low doses of rosemary could benefit memory, but further research on long-term effects is needed.
Lastly, a 2009 study with 144 participants showed that rosemary essential oil improved overall memory quality and secondary memory factors, although it slowed memory speed. Participants exposed to rosemary also felt more alert compared to the control group, indicating a positive impact on cognitive performance and mood.
However, these studies are small, so they don’t provide strong evidence for the claimed 75% boost in memory. The scientific community still needs to conduct more studies to confirm these results. Rosemary may improve memory and mood, especially at low doses, but high doses could harm memory. Further research is necessary to fully grasp these effects.
Are there better ways to improve memory?
Yes, there are many more reliable and scientifically supported ways to improve memory. Practices like regular physical exercise, a healthy diet rich in brain-boosting nutrients (like omega-3 fatty acids and antioxidants), quality sleep, and mental exercises (such as puzzles or learning new skills) have proven effects on memory and cognitive function. In comparison, while rosemary may offer some mild benefits, it is not a miracle solution for memory enhancement.
We reached out to Dr Kunal Bahrani, Director & HOD Neurology, Marengo Asia Hospitals, Faridabad, to learn the proven ways to boost memory. He says, “To improve memory, it’s important to focus on both physical and mental health. Eating a balanced diet with foods rich in antioxidants and omega-3s, along with regular exercise, helps keep the brain sharp. Challenging your brain with activities like reading or puzzles also boosts memory.”
Dr Bahrani adds, “Getting enough quality sleep is key, as it helps the brain store memories. Managing stress through techniques like meditation can also protect memory. By combining these healthy habits, you can improve memory and keep your brain healthy over time.”
THIP Media Take
In conclusion, while rosemary may have minor cognitive benefits, the claim that sniffing rosemary can increase memory by 75% is misleading and mostly false. For real, lasting improvements in memory, rely on proven lifestyle habits like exercise and a nutritious diet.
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