Here's their info on parabens:
Parabens
Parabens have been detected in human breast tissue and, although they cannot yet be conclusively linked as a possible cause of breast cancer, evidence now suggests they can act as oestrogen mimics.
(Byford, J.R., Shaw, L.E., Drew, M.G.B., Pope, G.S., Sauer, M.J., Darbre, P.D., ?Oestrogenic activity of parabens in MCF7 human breast cancer cells?; J. Steroid Biochem. Mol. Biol. 80: 49-60 (2002)
Darbre, P.D., Byford, J.R., Shaw, L.E., Horton, R.A., Pope, G.S., Sauer, M.J., ?Oestrogenic activity of isobutylparaben in vitro and in vivo?; J. Appl. Toxicol. 22: 219-226 (2002)
Darbre, P.D., Byford, J.R., Shaw, L.E., Hall, S., Coldham, N.G., Pope, G.S., Sauer, M.J., ?Oestrogenic activity of benzylparaben?; J. Appl. Toxicol. 23: 43-51 (2003)
Darbre, P.D., ?Underarm Cosmetics and Breast Cancer?; J. Appl. Toxicol., 23:89-95 (2003)
Routledge, E.J., J. Parker, J. Odum, J. Ashby, J.P. Sumpter, ?Some alkyl hydroxy benzoate preservatives (parabens) are estrogenic?; Toxicol. Appl. Pharmacol., 153:12-19 (1998).
In a random check, WEN found preservatives suspected of mimicking the female hormone oestrogen, in 57% of products ? this is especially worrying for women when lifetime increased exposure to oestrogen is linked to a heightened risk of breast cancer.
(WEN research)
One, propyl paraben, has been shown to adversely affect male reproductive functions; at the ?daily intake level? currently acceptable under EC law, it decreased daily sperm production.
(Oishi, S., ?Effects of propyl paraben on the male reproductive system?; Food and Chemical Toxicology, 40: 1807-1813 (2002))