This is just a starting point. I have not dug into it. I saw this in the esteemed medical journal "The Daily Mail" dailymail.co.uk/sciencetech...
"A compound hiding inside rosemary and sage has been turned into a new treatment that may reverse Alzheimer's disease.
Carnosic acid is antioxidant that has anti-inflammatory properties and is found in both of the herbs.
A team from the Scripps Research Institute in California discovered a way of harnessing the acid and using it to significantly lower inflammation in the brains of mice - a key trigger for Alzheimer's.
The drug the team created using carnosic acid, diAcCA, not only extinguished the inflammation but also restored the healthy number of nerve cell connections in the brain that promote learning and memory.
Moreover, scientists said that since carnosic acid is already considered 'safe' by the US Food and Drug Administration, this new treatment will hopefully get fast-tracked to clinical trials - getting it to real Alzheimer's patients sooner."
You can buy Carsonic Acid on eBay.
Not to be confused with L-Carnosine: Carnosic acid and carnosine are both known for their antioxidant properties, but they differ significantly in their structures and mechanisms of action: carnosic acid is a phenolic diterpene found in rosemary, while carnosine is a dipeptide (beta-alanyl-histidine) found in muscle tissue.