Herbal Galactagogues: What the Evidence Says (And What Your IBCLC Can and Cannot Tell You)
If you've ever Googled "how to make more breast milk," you've almost certainly encountered a dizzying array of teas, capsules, cookies, and supplements all claiming to boost your supply. Fenugreek, blessed thistle, goat's rue, moringa. The list goes on and on... As an IBCLC, I get asked about these products constantly and I want to give you the most honest, evidence-based answer I can, including a candid explanation of what I, as a lactation consultant, am and am not able to advise you on.
First: The Most Important Thing About Milk Supply
Before we talk about any herb, I need to say this clearly: the single most effective way to increase milk production is frequent, thorough, and effective milk removal from the breast. Whether that's a well-latched baby nursing on cue, effective pumping, or a combination, no galactagogue (herbal or pharmaceutical) can substitute for this fundamental principle.
The Academy of Breastfeeding Medicine (ABM), whose clinical protocols are widely regarded as the gold standard in lactation medicine, states explicitly that galactagogues should never be used to replace normal breastfeeding management by a breastfeeding specialist (IBCLC). If you're concerned about your supply, the first step is always a thorough assessment of latch, feeding frequency, breast drainage, and any underlying medical factors, not reaching for a supplement as a first line of defense.
What Is a Galactagogue?
A galactagogue (sometimes spelled "galactogogue") is any food, herb, or drug believed to assist in initiating, maintaining, or augmenting breast milk supply. Herbal galactagogues have been used across cultures for centuries. In the United States, over a quarter of breastfeeding mothers report using herbal supplements to support their supply, most commonly fenugreek, blessed thistle, and fennel.
What Does the ABM Say?
ABM Clinical Protocol #9: Use of Galactogogues in Initiating or Augmenting Maternal Milk Production (Second Revision, 2018) is the key reference document. Its conclusions are measured and important:
Many herbal remedies have a long history of traditional use to support milk supply, and traditional use suggests some degree of safety and possible efficacy.
However, the mechanism of action for most herbal galactagogues is unknown and most have not been rigorously scientifically evaluated.
High-quality evidence (meaning large, well-designed, placebo-controlled randomized trials) is largely lacking for herbal galactagogues.
Herbal supplements are not well regulated in the United States. Products may vary significantly in potency, purity, and actual ingredient content and some have been found to be contaminated.
The ABM does not endorse or recommend any specific galactagogue at this time, citing the absence of sufficient evidence on safety and efficacy.
Clinicians are advised to use an overall risk-to-benefit approach, discuss drug/herb interactions, and ensure informed consent.
This does not mean herbs are useless or dangerous, it means the evidence base is limited and that caution is warranted.
Common Herbals and what we know
1. Fenugreek (Trigonella foenum-graecum)
Fenugreek seed is the most widely used herbal galactagogue in the United States and is on the FDA's "Generally Recognized As Safe" (GRAS) list as a food additive. It is hypothesized to work through phytoestrogenic compounds and effects on sweat glands (mammary glands are modified sweat glands).
What to know:
May cause urine and sweat to smell like maple syrup, which can also affect a nursing baby's odor — this is harmless but notable.
Can lower blood sugar — relevant for people managing diabetes or hypoglycemia.
Can lower cholesterol.
Do not use if you are taking anticoagulant medications (blood thinners such as warfarin), as fenugreek may potentiate their effects.
Because fenugreek belongs to the Fabaceae (legume) family alongside peanuts, soybeans, chickpeas, and green peas, individuals with allergies to these foods should exercise extreme caution or avoid fenugreek entirely, as cross-reactive allergic reactions — including anaphylaxis — have been reported.
Avoid during pregnancy — fenugreek has uterotonic properties.
Some research suggests fenugreek may decrease supply in a subset of users, so monitoring is important.
2. Blessed Thistle (Cnicus benedictus)
Blessed thistle is frequently combined with fenugreek in commercial lactation supplements. It is often marketed alongside fenugreek, though it is an entirely different species from milk thistle.
What to know:
Evidence is based primarily on traditional use; no rigorous randomized controlled trials exist.
Generally considered safe at recommended doses.
May cause GI upset in larger doses.
Avoid in individuals with allergies to plants in the Asteraceae/Compositae family (daisies, ragweed, chrysanthemums, chamomile, echinacea).
3. Goat's Rue (Galega officinalis)
Goat's rue is popular in France and across Europe and is of particular interest because it is also believed to stimulate breast tissue growth. This makes it a frequent recommendation in the lay literature for people with insufficient glandular tissue (IGT), hypoplasia, or who are inducing lactation after breast surgery or for adoption. Notably, the drug metformin was originally derived from a compound in goat's rue (galegin).
What to know:
May be particularly relevant for low milk production related to insulin resistance, PCOS, or gestational diabetes— conditions with underlying metabolic factors affecting supply.
Can lower blood sugar — use with caution in individuals with diabetes or those on blood-sugar-lowering medications.
May inhibit platelet aggregation — do not take within two weeks before surgery.
Related to peanuts (legume family) — those with peanut allergy should use with caution.
Evidence remains largely anecdotal and traditional.
4. Milk Thistle / Silymarin (Silybum marianum)
Milk thistle (not to be confused with blessed thistle — they are entirely different plants) has been used historically across Europe as a galactagogue. In one study, milk thistle tea significantly increased milk yield compared with placebo, though this remains a limited evidence base.
What to know:
Silymarin is the active compound; it is best known as a liver-protective agent.
May lower blood sugar — monitor accordingly.
Generally well-tolerated.
Avoid in individuals with allergies to the Asteraceae family (ragweed, daisies, marigolds).
5. Moringa (Moringa oleifera)
Moringa is native to India, Pakistan, and Bangladesh and has significant cultural use as a galactagogue across South and Southeast Asia. It has gained considerable commercial popularity in recent years in the United States.
What to know:
Some small studies suggest a possible benefit, particularly when started shortly after birth.
High in nutrients, including iron, calcium, and vitamins.
Generally considered safe.
Avoid the root and root bark during pregnancy (these parts may have uterotonic effects); the leaf form used in supplements is generally considered safer.
6. Fennel (Foeniculum vulgare)
Fennel seeds have a long history of traditional use as a galactagogue across Mediterranean and Middle Eastern cultures.
What to know:
Contains phytoestrogenic compounds (anethole).
May affect levels of certain medications — can decrease levels of ciprofloxacin and interact with other drugs including fluconazole and erythromycin.
Avoid in individuals with estrogen-sensitive conditions.
Safety data in lactation is limited; the small amounts used in culinary settings are generally considered safe, but concentrated supplement forms require more caution.
7. Other Herbs with Traditional Use
The ABM Protocol also lists oats, alfalfa, dandelion, anise, basil, marshmallow root, seaweed, nettle leaf, and many others as having traditional galactagogue use across cultures. The evidence for all of these is limited to traditional use and small or poorly designed studies. This does not mean they are ineffective — it means that robust clinical evidence is not yet available.
Important Safety Reminders for All Herbal Products
Regardless of the specific herb:
Herbal supplements are not FDA-regulated in the same way as pharmaceuticals. Potency, purity, and even actual ingredients can vary significantly between brands.
"Natural" does not mean safe for everyone. Every herb has the potential for drug-herb interactions, allergic reactions, and contraindications in certain health conditions.
Always inform your healthcare provider (your OB, midwife, or primary care provider) before starting any herbal supplement, especially if you have a chronic medical condition or take prescription medications.
Monitor your baby. If you start any new supplement, watch your infant for any changes in behavior, stool, or feeding patterns.
A Critical Note About IBCLC Scope of Practice
This is where I want to be especially transparent with you, because it matters.
IBCLCs are not licensed to prescribe, diagnose, or recommend specific medications or herbal supplements.
According to the IBLCE Scope of Practice (2018), IBCLCs have a duty to provide evidence-based information regarding the use of medications, herbs, and supplements during breastfeeding and their potential impact on milk production and child safety. This is an important distinction:
✅ What I CAN do: Provide you with evidence-based information about how herbal galactagogues work, what the research does and doesn't show, what contraindications exist for certain health conditions, and what the ABM recommends.
✅ What I CAN do: Help you understand and evaluate the available literature so you can make an informed decision.
✅ What I CAN do: Identify that your particular situation — such as a history of PCOS, a thyroid condition, or a prior breast surgery — may be relevant to a conversation with your physician about galactagogues.
✅ What I CAN do: Refer you to appropriate resources (your OB, midwife, naturopathic doctor, or functional medicine provider) who are qualified to make personalized recommendations.
❌ What falls outside my scope: Diagnosing the medical cause of your low supply, prescribing herbal or pharmaceutical galactagogues, or recommending a specific product for your specific health condition.
This isn't a cop-out — it's an ethical and professional commitment to your safety. When I stay in my lane, I protect you from receiving advice that requires a full medical history and clinical license to give responsibly.
The best care for complex milk supply situations is collaborative: your IBCLC working alongside your OB, midwife, or other healthcare provider to create a plan that addresses all the factors involved.
The Bottom Line
Herbal galactagogues have centuries of traditional use and an understandable appeal, they feel accessible, natural, and empowering. The ABM acknowledges this history while honestly noting that robust clinical evidence remains limited, regulation of supplements is inconsistent, and no specific herbal galactagogue can be broadly recommended at this time.
If you are considering herbal galactagogues:
First, work with your IBCLC to optimize latch, feeding frequency, and breast drainage — these are foundational.
Discuss your full medical history with your healthcare provider before starting any supplement.
Be aware of contraindications relevant to your personal health situation.
Use reputable brands that undergo third-party testing for purity and potency.
Monitor and reassess. If you don't see a meaningful change within 2–4 weeks, the supplement may not be the right fit — or the underlying cause of low supply may need further investigation.
You deserve honest, evidence-based support and that starts with a conversation, not a supplement.
Have questions about your milk supply or want to explore what might be contributing to low production? I'd love to help: Hello@KindredMilk.com
References & Resources
Academy of Breastfeeding Medicine. ABM Clinical Protocol #9: Use of Galactogogues in Initiating or Augmenting Maternal Milk Production, Second Revision 2018. Breastfeeding Medicine, 2018.
IBLCE. Scope of Practice for International Board Certified Lactation Consultant (IBCLC) Certificants. December 2018.
Ryan R, et al. Use of galactagogues to increase milk production among breastfeeding mothers in the United States: A descriptive study. J Acad Nutr Diet. 2023;123(9):1329–1339.
LactMed — Drugs and Lactation Database, U.S. National Library of Medicine. https://www.ncbi.nlm.nih.gov/books/NBK501922/
Hale TW. Medications and Mothers' Milk. Current edition.
Marasco L, West D. Making More Milk: The Breastfeeding Guide to Increasing Your Milk Production. 2nd ed. 2020.
This blog post is for educational purposes only and does not constitute medical advice. Please consult your healthcare provider before starting any supplement.