Several herbal teas are popular among breastfeeding parents for supporting milk supply, though the evidence behind most of them is modest. Fenugreek tea and moringa leaf tea have the most research backing them as potential galactagogues (substances that promote lactation), while chamomile and lemon balm are commonly chosen for relaxation. Just as important is knowing which teas to avoid, since a few common herbs can actually reduce your milk supply.
Fenugreek Tea: The Most Popular Option
Fenugreek is the most widely used herbal galactagogue worldwide, and it’s the main ingredient in many commercial “lactation teas.” The proposed mechanism involves stimulating the release of prolactin and oxytocin, two hormones central to milk production and letdown. That said, the clinical evidence is mixed. One meta-analysis found a mild galactagogue effect, while another found no good evidence that it works at all.
In a U.S. survey of 122 mothers who tried fenugreek, 43% felt it increased their milk supply, but 5% actually thought it decreased it. A larger Australian survey of 421 mothers rated fenugreek somewhere between “slightly effective” and “moderately effective.” Some evidence suggests fenugreek may work better in the first few days after birth than it does after two weeks postpartum, which could explain why experiences vary so widely.
If you try fenugreek tea, keep in mind that it can cause a maple syrup smell in your sweat and urine, and some people experience digestive discomfort. It also has an unknown long-term safety profile during lactation, so most sources suggest using it for short periods rather than indefinitely.
Moringa Leaf Tea
Moringa leaf is gaining attention as a galactagogue, and it has some of the stronger clinical data available. In a randomized, double-blind, placebo-controlled trial of 88 postpartum mothers, those taking moringa leaf saw a 30% increase in breast milk volume compared to placebo. That’s a meaningful difference, though the study measured output only during the first three days postpartum, so long-term effects are less clear.
Moringa leaves are nutrient-dense, containing iron, calcium, and vitamins A and C, which makes the tea a reasonable choice even apart from any lactation benefit. Moringa tea has a mild, slightly earthy flavor and is widely available as dried leaf tea or powder you can steep in hot water.
Fennel, Blessed Thistle, and Other Common Ingredients
Most commercial lactation tea blends combine several herbs thought to support milk production. Fennel seed is one of the most common additions, with a long history of traditional use as a galactagogue, though rigorous clinical trials are limited. Blessed thistle and goat’s rue appear frequently in blends as well.
One pattern in the research is that combination products tend to perform better in studies than single herbs alone. A trial comparing fenugreek drops to a fenugreek-and-honey combination found the combination produced higher breastfeeding success scores after four weeks. This may reflect genuine synergy between ingredients, or it may simply mean that taste and overall experience matter for compliance. Either way, if you’re choosing a lactation tea, a blend of several traditional galactagogues is a reasonable approach.
Teas for Relaxation While Nursing
Not every tea choice needs to be about milk supply. Stress and poor sleep can interfere with letdown and overall breastfeeding success, so a calming tea has indirect value. Chamomile is one of the most common choices and has a long safety record during breastfeeding when consumed in typical amounts.
Lemon balm is classified as “generally recognized as safe” (GRAS) as a food flavoring by the FDA. No studies have directly measured whether its compounds pass into breast milk, but it has been safely used in combination products given directly to infants for colic and digestive issues. The smaller amounts that would reach an infant through breast milk are generally considered unlikely to cause harm at normal tea-drinking doses.
Teas That Can Reduce Milk Supply
Sage tea is one to avoid if you’re trying to maintain or increase your supply. Sage has a traditional reputation as a lactation suppressant and has historically been used to help with weaning or to manage oversupply. If you’re not intentionally trying to reduce production, skip it.
Peppermint tea in large quantities is also commonly reported to decrease milk supply, though the evidence is mostly anecdotal. An occasional cup is unlikely to cause problems, but drinking it multiple times a day could have a noticeable effect for some people. Spearmint, a close relative, carries similar cautions.
Caffeine Limits for Breastfeeding
If you enjoy black tea, green tea, or matcha, caffeine is the main consideration. Most guidelines suggest a daily limit of 200 to 300 mg of caffeine while breastfeeding. European health authorities recommend staying under 200 mg, while other sources set the ceiling closer to 300 mg. For context, a cup of black tea contains roughly 40 to 70 mg of caffeine, and green tea about 25 to 50 mg, so two to three cups a day typically falls well within safe range.
Mothers who consumed more than 300 mg of caffeine daily reported slightly more nighttime awakenings in their infants, though the difference wasn’t statistically significant in one study. Newborns metabolize caffeine much more slowly than older babies, so if your infant is under three months old, staying on the lower end of intake is a reasonable precaution.
How to Get the Most From Lactation Teas
The honest picture is that no tea is a guaranteed fix for low milk supply. The strongest drivers of milk production are frequent nursing or pumping, effective latch, and adequate calorie and fluid intake. Tea can be a helpful supplement to those fundamentals, not a replacement for them.
If you want to try a lactation tea, give it at least one to two weeks of consistent use before judging whether it’s helping. Track your output with pumping sessions or infant weight checks rather than relying on how full your breasts feel, which can be misleading. Drinking two to three cups per day is the standard recommendation for most herbal lactation blends. And staying well-hydrated in general, whether with herbal tea, water, or both, supports milk production on its own.