I am trying to take sage oil capsules as a treatment for memory loss. The capsules are 50mg, but they do not come with any recommendation about what the correct dose is. Will sage oil help memory loss?

Dr Fred Kavalier answers your health question:

In 2003, scientists at Newcastle University found that sage had a beneficial effect on memory. They used capsules that contained 50 microlitres of sage extract in sunflower oil. Have a look at the label on your capsules to get a dose similar to this. A few patients may develop raised blood pressure when taking sage, so if you have high blood pressure, avoid sage.

Please send your questions and suggestions to A Question of Health, 'The Independent', Independent House, 191 Marsh Wall, London E14 9RS; fax 020-7005 2182 or e-mail to health@independent.co.uk. Dr Kavalier regrets that he is unable to respond personally to questions.