It can be helpful. I tested positive for SIBO and low food map was recommended. Try it and then slowly add in foods you love to see how you feel. What is also very helpful is to go sugar free (if you need a sweetener for tea or coffee or plain yogurt, use organic stevia), also go gluten free. This may help a lot as it did for me and I have permanently done so. Eat only fruits in the berry family. Try also going dairy free for at least two weeks as the fat in dairy can be hard to digest. Then add one product back in and see how your gut reacts. Drinking Kefir is good as are pickles from the refrigerated section of the market. These foods are fermented and good for the gut to build up the good bacteria in your digestive tract. There are also other fermented foods such as kimchi and kombucha if you like the flavor.
Best to you, it’s a journey to find what works and doesn’t as each of our bodies are different.