Would taking a bedtime dose of CBD oil cause any issues with absorption of anything, especially Molybdenum which I just started to take before bedtime? The CDB is in an oil base, so this is technically food.

I would try to keep the minerals away from it by at least 30 minutes. Don’t take them at the exact same time. The oil or other ingredients could interfere. Or just take the molybdenum in the morning on an empty stomach when you wake up completely away from the CBD oil. 

Taking them at the exact same time once in a while is likely fine but I just wouldn’t make it a habit.