This is one of those internet "tales" that go around every so often -
I found that FDA had responded to this:
              http://www.fda.gov/cdrh/ocd/tamponsabs.html

All you ever wanted to know about the construction and components of
tampons!!!
Marie D. Garland, RN
Tx Department of Health
Bureau of Clinical Nutrition-
Women, Infant, and Children's Program
M-232
1100 W.49th St
Austin, Tx 78759
512-458-7444 ext 3109
FAX: 512-458-7446
email: [log in to unmask]
Visit the award winning TDH website: www.tdh.state.tx.us

"Many things we need can wait, the child cannot.
 Now is the time his bones are being formed,
 his blood is being made,
 his mind is being developed.
 To him we cannot say tomorrow, his name is today."
  --Gabriela Mistral