A lot of women are not entirely satisfied with their breast size and would like to change it. The majority of these are looking to go bigger rather than smaller. And because few people are willing to have surgery to fulfil their dreams, some resort to products with fake promises, as in foods, creams, and supplements.

Recently, we’ve seen a surge in articles about soy products claiming that soy milk has the potential to increase breast size. We went on to find out whether there is any truth to it. Are there any benefits of soy milk for breast enlargement or is it all a myth? Read on for the answers.

What are the Breasts Made of?

close-up of female bosom in cup size d lingerie

Let’s start off with the anatomy of the breasts. A woman’s breast is made not only of fatty tissue but also of two more components. One of them is called fibrous tissue which holds everything together. Then, we have glandular tissue which is in charge of milk production. It consists of glands that make milk (lobules) and ducts – tiny tubes that carry the milk from the lobes straight to the nipple.

The proportion of fibrous tissue and glandular tissue as compared to the amount of fat tissue available is what forms breast density. The bigger it is, they say, the greater your risk of cancer. Younger women are more likely to have dense breasts but that doesn’t mean that everyone will develop any diseases over time. The only way to find out where you fall on that chart is to have a mammogram. This is an X-ray of the breasts. Mammographic densities are divided into several groups to denote how likely a woman is to develop tumours in her breasts.

Can Soy Milk Increase Your Breast Size?

We are sorry to break it to you, but… not really. There is no definitive data that prove this method actually works. The majority of scientific studies focus on other aspects of soy foods in general. For instance, some randomised controlled trials on the risk of breast cancer cells and isoflavones (present in soy products) show the latter can slightly increase breast density in pre-menopausal women. Now, this doesn’t necessarily translate into bigger breasts, so don’t get under the impression that isoflavones are the key to more cleavage.

Besides, it was already mentioned that higher breast density could elevate the risk of breast cancer cells. This is not to say that soy consumption will cause problems. Interestingly enough, the results disclose that intake of soy isoflavones may lower breast cancer risk. Asian populations that have a high intake of soy foods score 3-fold lower rates of breast cancer. It has to be reiterated, these studies are scarce and not conclusive.

As with everything, more data is needed on both findings.

Health Benefits of Soy Milk and Soy-Based Food Items

Although science has been silent about the potential breast augmentation properties of soy products, it has to be said that soy has many positive effects on the body in general. Hence, it may be worthwhile to add it to your diet. Here are some of the advantages:

  • Soy foods are abundant in omega-3 fatty acids, which lower blood pressure, decrease the chance of stroke and heart attack, reduce the likelihood of abnormal heart rhythm, and lower triglycerides.
  • They contain vitamin B6 which is important for the immune system
  • They have healthy protein which helps to build muscle and support organs
  • Soy foods contain small amounts of magnesium which supports nerve function

Without a doubt, soy milk can be a perfect replacement for dairy milk (and other dairy products for that matter), as well as animal-based products. This applies especially if you are concerned about bad cholesterol. It is a fantastic addition to your diet as a whole because of its health benefits.

Why is Soy Milk Touted to Affect the Size of the Breasts?

What makes people think soy milk can be a natural breast enhancement product? Well, soy is rich in isoflavones, a type of phytoestrogens. What is that, you would ask? These are naturally occurring molecules that can mimic estrogen in the body. As you know, the latter substance is a hormone responsible for the growth of milk ducts and breast tissue. It’s part of the breast developmental stages alongside the growth hormone and plays a crucial role in human life.

Due to this, a lot of people are prone to believe that more phytoestrogens in the diet equals more hormones in the body and therefore leads to bigger boobs. That is not the case. When you become an adult, high estrogen levels have no impact on the breast size.

Some research suggests that the estrogen-like activity of isoflavones is not as potent as body estrogens, for which reason it does not increase estrogen levels but it can help regulate them if they go astray. In other words, soy isoflavones could act as a breast cancer prevention technique.

Other studies indicate that phytoestrogens can affect human biochemistry. Male transgender patients are given estrogens, the purpose of which is to spur some breast growth. Yet, medical literature does not support the theory that estrogens indeed increase breast size. One thing is for sure – more research is needed.

Roughly speaking, one gram of soy protein contains about 3.5 mg of isoflavones. Thus, one serving of some soy products like soymilk and tofu provides the body with 25 mg isoflavones. Other soy products worth noting are soybean sprouts, soy nuts, edamame, natto, tempeh, miso, and soy sauce.

A moderate intake of soy products will be beneficial and will not hurt your health in any way. But to be honest, it also isn’t likely to change your breast size that much. So, if you are only downing vanilla soy milk and stacking on soy-based foods because of these alleged effects, don’t bother.

Here are a few things to keep in mind:

  • Soy foods should be used carefully by pregnant women and by women who are nursing or trying to become pregnant, and their babies should not be fed soy formula.
  • Individuals who have high cholesterol, especially those with poor bone health, could see some modest benefits from soy foods.
  • The average consumer should not be alarmed by soy products, but this is not to say that soy-rich diets will cure all ailments.

Do Other Foods High In Phytoestrogens Help with Breast Size?

Phytoestrogens from other sources work in pretty much the same manner as those in soy. They can affect human biochemistry (decrease certain hormones) and have positive effects in people with a serious estrogen deficit like premenopausal women. Thus, it’s not impossible for these substances to act on the breast size to a small – and often insignificant – extent. For instance, they may make your breasts appear as full as they are when you are on your period, and that’s all. But then again, there is no data on whether these effects are long-lasting.

Foods that come with phytoestrogens include green beans, raspberry, watermelon, dried prunes, green tea, black tea, walnuts, red wine, white wine, and pistachios.

As far as dietary supplements are concerned, there is no evidence of their effectiveness either. Remember that those are marketing tricks and don’t get fooled by fake testimonials. Dietary supplements do not undergo rigorous testing and don’t have to get approved by federal agencies like FDA.

How is Breast Size Determined?

measuring female breast size

Whether you like it or not, breast size is mostly determined by family history. It’s always genes. They impact everything from your eye and hair colour to your predisposition towards some diseases and other stuff. This is something that you have little control over.

As much as you want to make your body produce more breast tissue so that you have bigger cleavage, there is no way to do that. Physical characteristics and bone structure are passed down from generation to generation and there is little you can do about it.

Of course, you should not forget that breast size can fluctuate throughout your life as it is affected by additional factors such as age and weight. Considerable weight gain or loss can impact your bra size the same way they do your whole body. Losing 20 pounds will shrink your chest. Gaining those back will have the opposite effect. As for age, younger breasts are fuller and perkier. Over time, sagging may occur and some of the fullness gets lost. The bigger the breasts, the more likely they are to sag faster.

Since you are not to blame for how big your breasts are, you should not feel embarrassed by it. That being said, if your cleavage makes you sad and impacts the quality of your life, don’t forget that medicine offers different ways of augmenting the bra cup size that have nothing to do with soy intake, dairy milk, supplementing, trying weird food recipes, or increasing hormone levels.

What Are Your Options for Increasing Breast Size?

If you think you’ll do yourself a favour by altering your diet to achieve your bust goals, you are wrong. So far, no diet has been proven to enlarge breasts, even though the market is brimming with products that promise that. All you are going to do is waste your money.

When it comes to natural ways to improving the fullness of your chest, good posture can help. So do exercises that focus on breast and back muscles such as push-ups, chest fly, lat pulldown, and resistance band pulled apart, to name a few. When you train your muscles, they can get bigger and make your breasts appear slightly fuller. Although they will not change in size, they will look different.

If you are not completely content with these options, you can always choose to go the surgical route. The two main mechanisms of breast enlargement are breast implants and fat grafting. The first one uses silicone or saline-filled devices that have different shapes and textures. They enable you to select the size of your breasts so you are happy with the outcome.

Fat grafting, on the other hand, is a less invasive procedure that employs liposuction so it can obtain fat cells from other parts of your body. Later on, these tissues, after being centrifuged, are planted into your chest using injections. The treatment is lengthy and may require multiple sessions until the desired results are achieved. One thing you should know is that there is a limit on how big you can go – the maximum is one cup size. But overall, the breasts look fuller and natural. You can find more info about these techniques on our website (unless you’ve done so already).


  1. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2953939/
  2. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5188409/
  3. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3074428/