I actually live 35 miles from London, England. Found this site by accident.
I have been taking Maca for 4 weeks. In the UK maca costs around $16 for 500g or 8 ozs of organic powder. Have just finished a cycle and it was 29 days from last one and was normal for me 3-4 days and not heavy. I have found since taking Maca that I have more orgasms during sex - the desire for sex has not increased but the quality has.
I have had acupuncture, homeopathy and herbal mixtures on and off for years - but the best medicine I have found is sex - Tantric Sex.