I just did a quick check on the Vit C - one thing is does is boost our immune system, which is the last thing we need since we already have an over active immune system. Vit C can also interfere with absorbing other vitamins, B12 in particular. You might not want to take the big dose for long without talking to your doctor.
those are great tips - you just have to be sure you don't get too much Vit C, which can stimulate the immune system, if I remember correctly. I'm glad your UTIs have improved.
Lemons works well too.
Alex