By Sanford H. Levy, M.D. http://www.acsu.buffalo.edu/~shlevy
From: http://www.acsu.buffalo.edu/~shlevy/osteo.htm
Industrial chemicals such as hydrazines and hydrazides can interfere with metabolism of vitamins and minerals. (from page three of document)
Widespread industrial use of vitamin B6 antagonists (hydrazines and hydrazides) may mean that consumption of RDA of this vitamin is inadequate for many individuals. (from page 24 of same document)
Note: This would also bring into question spine degeneration issues if you have Osteoporosis (DXA scan reading of less than -2.5) or Osteopenia (DXA scan reading between +1 to -2.5).
This Titan II Veteran has a DXA scan reading of -1.6.