Nope, I don't think taking baking soda the same day as a meth drug test will do you any good.
Firstly, you've left it too late to detox.
Secondly, there is nothing to suggest baking soda has any impact on drug tests. It's just a rumour.
will taking 5 spoons of baking soda 3 hours before my meth test today give me negative test?