Mr. Silver,
I don't want to sound like I'm lecturing, but if you and Silver are each drinking 8 cans of Diet Coke a day then you are certainly at risk of depleting nutrients and also increasing bone loss rate- for BOTH of you. Not to mention all the nasty chemicals as opposed to healthy beverages or just water. Do a bit of google research about aspartame/Nutrasweet, for one thing. Things to think about, for sure.
The other factor for bone loss is to make sure you are getting some weight bearing exercise- biking does not prevent bone loss, neither does swimming. Running, brisk walking, weight lifting, aerobics, jump rope, stair climbing....does. Google the latest news articles about how many men Pro cyclists are experiencing bad bone density losses due to not getting any weight bearing exercise. It's an eye opener.
A couple of possible alternatives....try some carbonated water flavored with natural flavors....they have some very tasty ones out now, like natural peach or white grape essence seltzers. These are almost no calories but have little or none of the bad things in them. Another thing is to mix seltzer with a little bit of fruit juice to make a healthy low calorie spritzer to guzzle.
You say you are allergic to tea- I assume you mean regular black tea. Well that still leaves a whole world of other interesting "teas" to try out- health/herb teas, mint, chai, perhaps green teas, fruit or flower teas, spice teas, many dozens of different flavored "teas" that are not black tea at all. You can't be allergic to all those- that would be like saying you're allergic to "plants". Experiment and find some healthy tisane that appeals to you, and starts drinking it, either hot, or iced by the half gallon pitcher. Perhaps buy a variety box of herbal teas to try. They have some wonderful gourmet variety boxes of themn at health food stores. Don't expect or seek to find anything that tastes like Diet Coke. You'd have to think new, different.
And remember that one must cut down on caffeine gradually or else get major painful headaches.
...Just some stuff to consider if you ever want to get away from the Diet Coke....
:)

