“If you want to build a ship, don't drum up people together to collect wood and don't assign them tasks and work, but rather teach them to long for the endless immensity of the sea” -- Antoine de Saint-Exupery
If your goal is to help your husband be healthier, then you must get him to want the change himself, not just beat him over the head with it.
I highly recommend watching a video of Gary Taubes' WHY WE GET FAT lecture (watch it together, I say)
Authors@Google: Gary Taubes - YouTube
And then watch Robert Lustig's Sugar lecture:
Sugar: The Bitter Truth - YouTube
If those two videos make an impact, then perhaps get him to read TPB.