Before spending money on gas remedies, consider whether the issue is actually gas. Infant fussiness has many causes — overtiredness, overstimulation, hunger, and the normal "witching hour" that peaks around 6 weeks. True colic (defined as crying more than 3 hours a day, more than 3 days a week, for more than 3 weeks) affects roughly 10-25% of infants and resolves on its own by 3-4 months regardless of treatment.
If your baby has additional symptoms — blood in stool, projectile vomiting, poor weight gain, or rash — talk to your pediatrician about cow's milk protein intolerance or other conditions that mimic simple gas. Checking our baby poop color chart can help you identify concerning stool changes. These require dietary changes, not gas drops.
For breastfed babies, the evidence on maternal diet elimination is mixed. The idea that everything a mother eats causes gas in baby is largely a myth, but in cases of true cow's milk protein allergy (present in about 2-3% of infants), a maternal dairy elimination trial under medical guidance can help. If you suspect an allergy, review the common food allergy signs in babies to know what to watch for.