1) Maca and general studies
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3184420/?tool=pubmed

2) Maca and Athletic Performance
http://www.ncbi.nlm.nih.gov/pubmed/19781622

3) Maca and Bone Health
http://www.ncbi.nlm.nih.gov/pubmed/20616517

4) Maca and Brain Function
http://www.ncbi.nlm.nih.gov/pubmed/20633111

5) Maca and Emotions (Depression & Anxiety)
http://www.ncbi.nlm.nih.gov/pubmed/18784609

6) Maca and Reproductive Health Function
http://www.ncbi.nlm.nih.gov/pubmed/20452008
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2928177/

7) Maca and Memory
http://www.ncbi.nlm.nih.gov/pubmed/21780878

8) Maca and Menopause
http://www.ncbi.nlm.nih.gov/pubmed/21840656

9) Maca and Prostate
http://www.ncbi.nlm.nih.gov/pubmed/21762188

10) Maca and Skin Protection
http://www.ncbi.nlm.nih.gov/pubmed/21781063