baking soda

i take a half a tsp. in the morning and in the eavning. i have been doing this for 3 days now. on the box it says not to do it for morthan 2 weeks. i found out it was really alkaline so i figured all the better. i am seeing really good results with it and was just wondering what its doing? im getting a little gas now and then, that smells pretty wrotten. any info will be apreciated. thanks