Around 2,000 years ago, Shen Nong first referred to Schizandra as a valuable adaptogenic tonic. Since then, it has remained one of the most popular adaptogenic herbs in China, where it is taken to promote mental function, strengthen the sex organs and beautify the skin.

This ancient Chinese remedy is available in 50mm bottles  for £11.95. Recommended dose is 10 drops (in any drink) before sexual activity. Do not take  more than three times a day.