Don’t have any experience with this, but I will note that heartburn-type issues are very often due to low stomach acid ironically (which causes the sphincter at the top of the stomach to not close properly so the still-somewhat-acidic juices leak out). Things like PPIs and baking soda will lower the acidity of the stomach, but then you are likely at risk for all of the problems associated with low stomach acid – like vit B12 deficiencies, etc. So I would be careful.