A method and composition useful for improving memory of a subject are disclosed. The method comprises the step of administering the composition to the subject. The composition consists essentially of Cistanche extract and Ginkgo extract (e.g. as actives). In a first general embodiment, the extracts are present in a weight ratio (Cistanche to Ginkgo； or “C:G”) that is >；2.5:1. In a second general embodiment, the extracts are present in a weight ratio that is <；2.5:1. In embodiments of the first general embodiment, the composition comprises about 72-99 weight percent (wt. %) Cistanche tubulosa extract and about 1-28 wt. % Ginkgo biloba extract. In embodiments of the second general embodiment, the composition comprises about 50-70 wt. % Cistanche tubulosa extract and about 30-50 wt. % Ginkgo biloba extract. The Cistanche tubulosa extract is generally obtained from root material and the Ginkgo biloba extract is generally obtained from leaf material. The composition may also include inactives.
