Hi Josiah.
Good to see that others are looking into alkalizing their body for improved health which can only be of help Afibbers.
The obvious answer would be to stop taking either the Vit C, the Betaine? or both and see what happens, I would expect the change in pH , if any, would be apparent within two days.
I have just finished alkalizing test No 3, a 12 day course of taking 1 teaspoon of Baking Soda (Sodium Bicarbonate) at 10am and then again at 10pm. Unfortunately I can't get the MoM to make the Waller Water to aid the alkalizing effect so its Baking Soda for me. This Baking Soda ensures the pH rises rapidly and my early morning urine pH is at 9pH within 3 days and stays there unless I have a few drinks too many on the weekend when it will drop to 7pH or 6pH worst case.
I take 3 to 4 grams of Vit C per day and have done for ages. I also take 1 spoonful of Potassium Gluconate to possibly help offset any unoticeable issues with the sodium in Baking Soda. Note the regimen does not raise my BP one iota.
Alkalizing test No 4 will be changed to 2 TABLEspoon full of Apple Cider Vinegar - apparently very alkalizing - in real orange juice at 10am then 1 teaspoon of Baking Soda at 10pm, this will eliminate 50% of the sodium.
Barry G.