Actually, you are probably doing the right thing by splitting it up, but despite your efforts your body is still not absorbing most of it.

May I suggest a liquid vitamin? Again, you would want to drink this at night before bedtime or add it to some water that you would drink throughout the day-as you were trying to do with the pill. Much more would be absorbed by your body and you will feel the effects that it is working.
If I have been of help, please let me know.