Despite its long-standing use as a galactagogue, there is little scientific evidence to suggest that it works. Mango Breastfeeding Smoothie to Increase Lactation. Brewer's yeast has a history of use as a galactagogue, which is a food, herb or medication that increases milk supply in nursing mothers. Side Effects of Brewer’s Yeast for Breastfeeding. Brewer’s yeast, as a nutritional supplement is considered to be safe for breastfeeding women. The water will also depend on this as well. A study found brewer’s yeast efficacy ambiguous, as it was with other galactagogues (2) . Brewer’s yeast has been traditionally used as breast milk stimulant. This dough is very dry so adding water helps. This delicious tropical smoothie is your perfect summer treat that will increase lactation quickly with fruits, oatmeal, flax meal, and Brewer’s yeast… all known to increase milk supply! Make sure your Brewer’s Yeast is “Reduced Bitterness” or try using a little more sugar to balance this. *Depending on how low your milk supply is will depend on how much Brewer’s Yeast you should put in. Brewer’s yeast tablets for lactation is equally common and consuming 2 to 3 tablets up to three times a day is quite safe. …and the good thing about adding brewers yeast to your diet is that it's a … It’s a nutritional powerhouse and breastfeeding women all over the world have used it for centuries to increase their milk supply. If you use 4 Tbsp it will be more bitter. As a breastfeeding mom we are constantly on a quest for recipes to boost milk supply naturally. Brewers yeast is a SUPERSTAR in the world of lactation!