We were instructed to add 1/8 tsp per day divided between bottles. Now that Ellie is close to a year, it was recently increased to 1/4 tsp per day divided between bottles (she'll be on formula for another 6 mos as she's not eating much solid food). When she is eating solid foods, they informed us that she'll no longer require supplementation as she'll crave salt and ingest sufficient amounts on her own....