Debunked: The Breastfeeding 'Facts' That Are Actually Holding You Back

Opinion piece by the Nurture Nest editorial team

Somewhere between the hospital discharge paperwork and your third 2 a.m. Google spiral, you've probably encountered a piece of breastfeeding advice that felt completely authoritative — and was completely wrong. Maybe it came from a well-meaning relative. Maybe it was a viral TikTok. Maybe it was a Facebook group with 200,000 members and zero fact-checkers.

Misinformation about breastfeeding isn't just annoying. It's genuinely harmful. It erodes confidence at the exact moment new mothers need it most, contributes to early weaning that mothers later regret, and in some cases, puts babies at nutritional risk. So let's name the myths, dismantle them with actual research, and talk about why they're so stubbornly persistent.

Myth #1: Breast Size Determines Milk Supply

This one refuses to die, and it's been causing unnecessary anxiety for generations. The belief that small-breasted women simply can't produce enough milk is anatomically incorrect.

Breast size is determined primarily by fatty tissue — not by the glandular tissue responsible for milk production. According to research published in Maternal & Child Nutrition, milk-making capacity is related to the amount of glandular (secretory) tissue, which varies widely among women regardless of overall breast size. A woman with small breasts can have abundant glandular tissue; a woman with large breasts might have relatively less.

That said, breast storage capacity — how much milk the breast can hold between feedings — does vary and can influence feeding frequency. But this is different from total daily production, which, for most women, is more than adequate with proper latch, frequent feeding, and responsive demand.

Why does this myth persist? Partly because we conflate size with function in a culture that's already complicated about breasts. And partly because supply issues do exist — they're just rarely caused by breast size.

Myth #2: If It Hurts, You're Doing It Right (or Wrong) — Depending on Who You Ask

Here's a contradiction that captures how confusing breastfeeding advice can be: some people insist that pain is normal and you just need to push through, while others say any pain means something is wrong. Both extremes miss the mark.

Initial nipple tenderness in the first week or two is genuinely common as your body adjusts. But persistent, sharp, or burning pain is not normal and typically signals a problem — a shallow latch, a tongue tie, a bacterial or fungal infection, or vasospasm.

A 2019 review in the Journal of Human Lactation found that nipple pain is one of the top reasons mothers discontinue breastfeeding earlier than intended, and that many of these cases were addressable with proper lactation support. The takeaway: don't white-knuckle through severe pain, and don't assume something is catastrophically wrong because nursing feels tender in week one. Context matters — and a lactation consultant can help you figure out which situation you're in.

Myth #3: You Need to Drink Milk to Make Milk

This one is almost charming in its logic — and completely unsupported by evidence. Dairy intake has no direct relationship to breast milk production. Your body synthesizes milk from your blood, which is fueled by what you eat overall, not by any single food.

That said, staying well-nourished and hydrated absolutely matters. The Academy of Breastfeeding Medicine recommends that nursing mothers eat a varied, balanced diet and drink to thirst. There's no magic lactation food, despite what the market for lactation cookies and teas might suggest. (More on that in a moment.)

The dairy myth likely originates from older folk wisdom equating milk with milk — the kind of intuitive but scientifically ungrounded thinking that's passed down through generations. It's harmless unless it causes unnecessary guilt in lactose-intolerant or vegan mothers who are already doing everything right.

Myth #4: Lactation Supplements Will Fix a Low Supply

The lactation supplement industry is booming, and we understand why — when supply feels low, you want to do something. But the evidence for most galactagogues (substances believed to boost milk production) is weak at best.

A 2020 systematic review in Breastfeeding Medicine found insufficient evidence to recommend most herbal galactagogues, including fenugreek — which, incidentally, has been shown in some studies to decrease supply in certain women. Oatmeal, brewer's yeast, and blessed thistle face similar evidentiary gaps.

This doesn't mean every supplement is useless for every person. But the more powerful intervention is almost always addressing the underlying cause of low supply — whether that's infrequent feeding, poor latch, hormonal factors, or insufficient glandular tissue — rather than layering supplements on top of an unaddressed problem.

We're not saying skip the lactation cookies if you enjoy them. We're saying don't let them replace working with an IBCLC to figure out what's actually going on.

Myth #5: Breastfeeding Ruins Your Relationship (or Your Body, or Your Sex Life)

This cluster of myths tends to circulate more in certain cultural spaces than others, but it's worth addressing directly because it shapes real decisions.

Does breastfeeding affect your body? Yes — temporarily. Hormonal changes during lactation, particularly elevated prolactin and lower estrogen, can cause vaginal dryness and reduced libido. This is real, it's biological, and it deserves honest conversation rather than shame. But it's also typically temporary, and there are options — including topical estrogen, lubricants, and open communication with a partner — that can help.

Does breastfeeding harm romantic relationships? The research doesn't support this. In fact, the oxytocin released during nursing can support maternal emotional regulation, which has downstream effects on relationship quality. The strain often comes not from breastfeeding itself but from the broader context of new parenthood — sleep deprivation, identity shifts, and unequal labor distribution — which are worth addressing regardless of how you feed your baby.

The framing of breastfeeding as something that damages relationships or bodies reflects a broader cultural discomfort with the functional, non-sexual role of breasts — not an evidence-based concern.

Why These Myths Spread — and Why It Matters

Misinformation about breastfeeding doesn't exist in a vacuum. It thrives in the absence of accessible, high-quality lactation support. When new mothers can't easily reach an IBCLC, they turn to social media, family members, and internet forums — spaces where well-intentioned but inaccurate information spreads rapidly.

The consequences are measurable. Research consistently shows a link between exposure to breastfeeding misinformation and decreased maternal confidence, increased anxiety, and earlier-than-desired weaning. Maternal confidence, it turns out, is one of the strongest predictors of breastfeeding duration. When we undermine it with myths, we undermine the whole endeavor.

This is why access to real, evidence-based lactation support isn't a luxury — it's a public health issue.

What to Do With All of This

When you encounter a piece of breastfeeding advice that makes you feel guilty, confused, or like your body is failing, pause before internalizing it. Ask: Who is saying this? What's the evidence? Does this align with what a certified lactation consultant has told me?

Your instincts about your body and your baby are worth trusting. So is actual science. The two aren't in conflict — but they do require the right information to work together.

At Nurture Nest Lactation, we believe every mother deserves access to honest, evidence-based support — not the myths that make this harder than it needs to be. Explore our resources and connect with a lactation consultant at nurturenestlactation.com.