birth control pills Archives - Dr. Alexandra MacKillop /tag/birth-control-pills/ Functional Medicine Tue, 10 Feb 2026 21:41:38 +0000 en-US hourly 1 https://wordpress.org/?v=7.0.4 https://i0.wp.com/alexandramackillop.com/wp-content/uploads/2025/05/cropped-cropped-logo.png?fit=32%2C32&ssl=1 birth control pills Archives - Dr. Alexandra MacKillop /tag/birth-control-pills/ 32 32 245039875 Risk of Blood Clots and Other Dangers of Hormonal Birth Control /how-hormonal-birth-control-impacts-womens-bodies-lesser-known-risks-you-shouldnt-ignore/ Fri, 11 Jul 2025 10:00:00 +0000 / Before I dive into the details of this post, I want to make very clear that this post is not meant to judge or shame anyone for their contraceptive choice. This is a very personal topic, and my goal is simply to present some of the less-talked-about health risks created by hormonal birth control. I […]

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Before I dive into the details of this post, I want to make very clear that this post is not meant to judge or shame anyone for their contraceptive choice. This is a very personal topic, and my goal is simply to present some of the less-talked-about health risks created by hormonal birth control. I am a firm believer in empowering women to make educated and informed health choices that align with their values, and if The Pill helps you live authentically, then I’m all about that. I just want you to have all the information that you rightfully deserve. The purpose of this post is to share knowledge that you may find helpful when considering your own reproductive health, whether you choose to use birth control pills or not.

Please note: When referring to hormonal contraceptives, birth control pills or “the pill” in this post, I am referencing medications containing both estrogen and progesterone analogs (estradiol and progestin).

The menstrual cycle plays a powerful role in women’s health, and not just in terms of fertility. As I often say, our periods tell us way much more about our sense of well-being than whether or not we’re pregnant, and that information is so, so important! If our cycle is out of sync, it’s really important for us to address those concerns early so that the underlying causes–like thyroid, metabolic, adrenal, or other hormone imbalances—don’t worsen and lead to disease.

Masking the Root Cause

Because of their ability to give us early warning signs about our health, our periods are referred to as our “fifth vital sign” along with heart rate, blood pressure, temperature, and breathing rate. When it comes to our cycles, deviations from the norm often signify an underlying health concern that will intensify, eventually leading to a more serious problem. For example, most chronic illnesses that we see today are either triggered or worsened by stress. Even if a person isn’t experiencing a flare up of their chronic symptoms (or maybe they have a genetic predisposition that hasn’t yet manifested), our bodies can send us warning signals that our stress is reaching a critical level through changes to our menstrual cycles. Stress interrupts the delicate web of signals between our brains and the organs that secrete our hormones (sex hormones, thyroid hormones, metabolic hormones, and more) leading to missing, painful, or irregular cycles. (For more about the details of what your period can tell you about your health, check out this post.)

Birth Control Pills Shut Down Our Natural Hormonal Processes

As I explain in my book, Go with Your Flow, the main event of our menstrual cycle isn’t the bleed, but rather it is ovulation–the release of an egg. The first two weeks of the cycle are all about ramping up the hormonal signals (mainly estrogen) required to mature and release an egg so that your body can become pregnant. After ovulation, progesterone takes over, preparing the uterus to become a suitable environment for a growing baby if the egg meets a sperm along its journey through the fallopian tube. As you learned in sex ed, the egg passes through if it isn’t fertilized, and the uterine lining sheds away. This shedding of menstrual blood–your period–marks day one of the next cycle.

Birth control pills are made up of chemicals that resemble estrogen and progesterone, overriding your body’s natural signaling pathways. Their purpose is to prevent the release of an egg while still allowing your body to “go through the motions” (i.e. by thickening and shedding the uterine lining every 28 days.) While it might seem easier to just not have a period at all, the processes that take place during your cycle are about more than fertility, and shutting them down completely would be very dangerous, leading to osteoporosis, heart disease, and other health problems. So in lieu of completely eliminating your period, the pill shuts off the “main event” of your cycle, aka ovulation, while setting up a carefully curated hormonal environment that mimics a healthy period.

Except it isn’t a healthy menstrual cycle because it isn’t a menstrual cycle at all. It’s just a bleed. Without being able to control their own hormonal fluctuations, our bodes lose their ability to communicate with us about our hormonal health status.

Because of the way that the false periods induced by birth control pills so closely resemble healthy cycles, the pill is often prescribed for reasons other than contraception. Patient suffering from hormonal acne, PMS, painful periods, PCOS, and other women’s health conditions are often given birth control pills because it seems to solve these problems. But the root cause of these issues goes much deeper, and the pill simply masks over the real issue. It’s kind of like breaking your toe and “curing” the problem by chopping off your whole leg. It completely misses the point. Your toe stops hurting, but only because you don’t have one anymore! The same is true of using the pill for non-contraceptive purposes. Your period seems normal but only because you aren’t really having your cycle anymore! As a result, the underlying cause is left to fester, and often returns with a vengeance as soon as you come off the pill.

Health Risks

In addition to masking over our health problems, the pill often outright creates health risks of its own. Here are just a few:

  • Infertility: Despite being often marketed as a “fertility drug,” the pill does not support the optimal function of the female body. It actually does the opposite, by shutting off reproductive function and inhibiting ovulation. Unfortunately, many women struggle with fertility problems even after they discontinue use of the pill. It’s not as if ovulation magically starts up again after being chemically prevented. It takes time for the body to re-learn how to secrete hormones in a balanced and functional way. Sometimes, the body can’t reach that place post-pill on its own without medical support.
  • Hormone Imbalances: Even if ovulation resumes, many women find that they struggle with metabolic, thyroid, adrenal, or other hormonal imbalances outside of fertility upon coming off the pill. As I describe in this post, our various hormonal systems are all interrelated, so when we so drastically interfere with one aspect of the HPATG axis (as is the case with the pill), other bodily systems can become imbalanced too. Symptoms like fatigue, weight gain, thinning hair, insomnia, and more can all point back to hormonal contraceptive use, or discontinued use.
  • Blood Clots: A widely known fact in the medical community that is seldom talked about in a clinical setting is that oral contraceptives containing estrogen or estrogen analogs increase the risk of blood clots forming, even in otherwise healthy women with no underlying conditions. While certain factors increase risk of this phenomenon (smoking, being over 35 years of age, prolonged inactivity, and family history), the likelihood of blood clots goes up dramatically for all women. These blood clots form in deep veins of the body (most often the legs), and if they break off, they can become lodged in the heart (causing a heart attack), lungs (causing a pulmonary embolism) or brain (causing a stroke). This risk is increased even if a woman follows a healthy lifestyle. [Note: Blood clots from using oral contraceptives is often presented as a low risk, but it’s not really that low. Different sources say different things, but it’s typically discussed about as being about 1/1,000, or 0.1%. Let’s add some context…the CDC estimates that 28% of US women are currently using oral contraceptives, which is about 10.6 million women. I’ll let you do the math, but 0.1% of 10.6 million isn’t a small number—and it seems even larger when it’s someone you know. I personally know of three women in from my own personal life (not even counting patients) who experienced this in their twenties.]
  • Heart Disease: Long-term exposure to hormonal analogs like those found in the pill act like a biochemical source of stress in the body. These chronic stress exposures alter the metabolism of lipids and carbohydrates in the body, raising blood cholesterol and triglycerides and increasing risk of chronic disease, especially heart disease in women. Once again, this is true even for otherwise healthy individuals.
  • Increased risk of some cancers—namely breast and cervical cancer. Breast cancer is the number one most common type of cancer among women, and cervical cancer is the fourth most common type of cancer in women, worldwide.
  • Insulin Resistance: One of the ways that oral contraceptives affect metabolism is by increasing blood glucose levels and subsequent insulin secretion. With time, this can increase risk of insulin resistance and the development of metabolic syndrome and/or diabetes.
  • Gallbladder and Liver Dysfunction: Part of the role of the liver and gallbladder in our health is to detoxify our bodies from old, broken down hormones, red blood cells, and other waste products. This is a natural and normal process, but sometimes it can become overloaded if the amount of waste buildup is higher than the normal capacity of these organs. Sex hormones like estrogen are one of the major substrates of the liver and gallbladder, and can “clog up” the system leading to low-grade damage. Some women who experience this manifest skin reactions like itching, rashes, or yellowing of the skin (jaundice).

Female Empowerment

It still blows my mind that so many important women’s health topics are still taboo. Sure, sex is a private matter, but healthcare information shouldn’t be limited or kept secret. As women, we deserve to understand our bodies, including the implications of the medical interventions we receive. Ovulation and menstruation are normal and necessary parts of a healthy woman’s body if she is of reproductive age, and these functions (or lack thereof) give us valuable insight into our well-being. They don’t need to be shut off, and we don’t need to be quiet about it.

Our level of understanding of the female body in science doesn’t require us to subdue our femininity in order to allow us to make family planning decisions in accordance with our values. Likewise, we deserve better medicine—safe and effective, individualized treatment plans that address the root cause of symptoms, whether in terms of our reproductive health or otherwise. If the birth control pill fits your goals and values for your life, that’s awesome! I totally support you. But I also want you to know that if it doesn’t, there are other options for you that protect your health and your values, and which allow you to make informed decisions on behalf of both your family and your own body.

Censorship of these conversations limits a woman’s access to essential information about her sense of well-being. Sexual health isn’t gross or weird, and it shouldn’t be hush-hush. In fact, every single person on earth is only here because of the function of a woman’s reproductive system. The female body is amazing, and each of us should have the privilege of understanding it on a personal level, especially when making the very personal decision about whether or not to use hormonal contraceptives.

I’m Dr. Alexandra MacKillop, a functional medicine doctor, food scientist and nutrition expert.

I specialize in women’s nutrition & hormonal health, addressing concerns like longevity, fertility, postpartum, PCOS, endometriosis, and gut symptoms like bloating, constipation, diarrhea and more.

If you’re looking for a new way to approach your health, I’m here to help you through it.

Don’t miss out! Join the email list.

Love this post Share it!

Want more Grab a copy of my new book, The Postpartum Check-In !

Reminder: The information on this post or anywhere else on this blog or other writing is purely educational, and is not intended to diagnose, treat, prevent, or cure any health condition.

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How to Fix Estrogen Dominance with Functional Medicine /estrogen-dominance/ /estrogen-dominance/#comments Fri, 04 Sep 2020 13:00:00 +0000 / Estrogen dominance is a buzz word in natural health circles. With it popping up in conversations everywhere, you might be wondering what it is, whether you need to worry about it, and how to fix estrogen dominance naturally through functional medicine. If that’s you, you’re in the right place. Women’s health concerns tend to follow […]

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Estrogen dominance is a buzz word in natural health circles. With it popping up in conversations everywhere, you might be wondering what it is, whether you need to worry about it, and how to fix estrogen dominance naturally through functional medicine. If that’s you, you’re in the right place.

Women’s health concerns tend to follow predictable patterns. In healthy women, cyclic changes in sex hormones throughout the month make it possible to track fertility—everything from ovulation, to an expected period, to optimal days for conceiving or avoiding pregnancy. In the same way, dysfunctional cycles tend to follow predictable patterns according to measurable imbalances in estrogen, progesterone, and testosterone. One of the most common hormonal imbalances is estrogen dominance, which can disrupt the natural rhythm of the menstrual cycle.

Whether or not the imbalance clinically correlates to a formal diagnosis—such as endometriosis or PCOS—there’s a lot that can be done to help balance female hormones. Estrogen dominance is one key reason that cycles can get out of sync, and it’s often associated with symptoms like heavy periods, breast tenderness, weight gain and mood swings. Addressing estrogen dominance through lifestyle changes, nutrition, and targeted supplementation can make a meaningful difference in restoring hormonal balance.

Estrogen Dominance and Progesterone

Throughout the female cycle, two hormones tend to be held responsible for triggering key events such as ovulation and the start of a period.

  • In the first half of the cycle, which is classically defined by estrogen dominance, estrogen rises and falls, correlating with a hormonal signal from the brain that triggers the release of an egg.
  • Following ovulation, the ovary produces progesterone, which is responsible for thickening the uterine lining in anticipation of pregnancy.
  • After about seven days, progesterone levels peak and begin to steadily decline; once they drop low enough, the lining starts to shed, signaling the start of a period and another cycle.

However, that delicate balance between estrogen and progesterone can easily become disrupted by other hormonal imbalances such as thyroid hormones, or cortisol—the stress hormone. Often, this leads to a relative excess of estrogen in comparison to progesterone, creating symptoms like hot flashes, moodiness, fatigue, painful periods, and more. We call this estrogen dominance. Long-term elevation of estrogen can also increase risk for cardiovascular disease, breast and ovarian cancers, diabetes, and infertility. If monthly symptoms aren’t bad enough, the long-term risks mean that addressing estrogen dominance is really important for lifelong health and well-being.

What Causes Estrogen Dominance?

The production of estrogen from the ovaries is regulated by the hypothalamic-pituitary-gonadal axis, a delicate web of signals between the brain and reproductive organs. The estrogen excess form of estrogen dominance can result from interruptions along the entire axis, whether from a signaling problem at the brain level, or from dysfunction of the ovaries themselves. Many women also experience high estrogen because the pathways involved in the synthesis of estrogen can be interrupted by hormone-disrupting chemicals (such as BPA and plastics), because the precursor hormones are being diverted into the production of other hormones (like cortisol), or because of autoimmune diseases or medication use. Here are a few other reasons for high estrogen and estrogen dominance:

  • Adrenal dysfunction
  • Perimenopause
  • Exogenous estrogen use (such as hormonal contraceptives)
  • Exposure to xenoestrogens (BPA, phtlalates, DEHP, and other chemicals found in plastic; insecticides; food additives such as BHA and those found in red dye)
  • Insulin resistance
  • PCOS
  • Liver dysfunction
  • Hypothyroidism
  • Smoking
  • Use of the fertility drug, Clomid (Clomiphene citrate)
  • Inflammation

Note: I explain the details of what is and isn’t normal and how to explore natural treatment options in my book, Go with Your FlowClick here to learn more.

What to Do About Estrogen Dominance

As with any hormonal imbalance, effective treatment for estrogen dominance starts with identifying the root cause. This is why it’s so important to work with a naturally-minded healthcare provider to review diagnostic tests and lifestyle/history to get to the bottom of the estrogen dominance. If adrenal dysfunction is the driving force behind high estrogen and estrogen dominance, for example, no amount of estrogen-clearing supplements will effectively solve the problem. The adrenal dysfunction needs to be addressed, first!

Once an appropriate diagnosis is made and healing efforts are underway, there are a number of steps that can be taken to help the body clear out excess estrogen, balance out the production of progesterone, and get the hormone levels back to a functional status quo.

Lifestyle Modification for Estrogen Dominance

Gut Health: As with many other areas of health, the gut microbiome plays a huge role in hormonal balance. Not only do the naturally-occurring bacteria and yeast in our digestive tract aid in digestion of food and absorption of nutrients, they also produce a large proportion of the body’s hormones and neurotransmitters. They also are involved in the metabolism and excretion of hormone breakdown products. The group of bacteria responsible for metabolizing estrogen and estrogen breakdown products is called the estrobolome. A disruption in the gut microbiome can easily lead to estrogen dominance.

The more different types of bacteria we have in our gut, the greater the number of functions our microbiome has. (This is why microbial diversity is important.) When our gut diversity is limited, functions such as those carried out by the estrobolome are interrupted. Rather than restricting your diet, as many “estrogen dominance diets” encourage, focus on including as many different types of plant foods and fibers in your diet as you can. No, vitamin powders or fiber supplements aren’t going to do the trick.

Stress: In my clinical experience, the most common cause of hormonal imbalances among women, including estrogen dominance, are related to stress. Whether that source of stress is emotional, relational, physical, nutritional, or otherwise, stress management is key. In an estrogen dominance hormonal pattern, progesterone is also typically low. Progesterone and cortisol a both produced from the same hormonal precursor, called pregnenolone. When stress levels are high, the body allocates its resources towards producing cortisol, which means there aren’t many leftovers for producing progesterone. (This is called pregnenolone steal.) The end result is functionally low progesterone, either creating or amplifying an existing pattern of estrogen dominance.

For more information about lifestyle methods for balancing hormones, check out this post: 5 Ways to Balance Your Hormones, Naturally

Nutrition for Estrogen Dominance

Whenever I talk about diet minutiae with my patients, the emphasis is almost always on adding rather than restricting (except in the cases of allergies/intolerances, of course.) In terms of hormonal balance, research has shown that certain foods help drive or suppress certain dysfunctional hormonal pathways because of the biochemical compounds found in those foods. This is especially true of estrogen dominance.

Flax: When estrogen is metabolized, it converts into one of three breakdown products: 4-hydroxyestrone, 2-hydroxyestrone, and 16-alpha-hydroxyestrone. Each of these metabolites plays an important role in the body, but when levels of 16 and 4 hydroxyestrone get too high, it increases the risk of hormonal symptoms and even the risk of breast cancer. On the other hand, 2-hydroxyestrone has been shown to prevent these negative health effects. The lignans found in flax help drive the metabolism of estrogen down the 2-hydroxyestrone pathway. (In order to access the lignans found in flax, the flax must be freshly ground rather than whole or pre-ground.) Flax is a great solution for estrogen dominance when used appropriately, in the correct context.

Cruciferous Vegetables: Cabbage, broccoli, cauliflower and brussel sprouts sometimes have a bad reputation because of their smell. But those stinky, sulfur compounds (such as indole-3-carbinol and di-indolylmethane) also support the estrobolome in metabolizing and excreting estrogen breakdown products. They also help protect against estrogen-receptor-positive type breast and ovarian cancers, which is an important consideration in women presenting with an estrogen dominance pattern.

Avoid Excess Alcohol: A glass of wine (or beer, or whiskey, or whatever you enjoy) a few times a week won’t harm your health, but drinking above and beyond this inhibits the enzymes responsible for estrogen metabolism, furthering symptoms of estrogen dominance.

Supplements for Estrogen Dominance

Calcium-D-Glucarate (CDG): This supplement inhibits enzymes responsible for reabsorption of partially-metabolized estrogen, helping the body with excretion. Oral doses of CDG have been shown to lower serum estrogen levels and reducing risk of estrogen-receptor-positive breast cancer as well as associated symptoms of high estrogen. CDG also has a concurrent lipid-lowering effect, which is especially beneficial in women whose estrogen dominance is driven by insulin resistance. (In addition to managing blood sugar, insulin drives the production of cholesterol and blood lipids.) Calcium-D-Glucarate is typically used in the range of 1500-3000 mg daily.

DiindolylMethane: This is one of the main compounds found in cruciferous vegetables, responsible for estrogen-detoxifying effects. This supplement is often dosed in the range of 100-400 mg daily. (Fun fact: you can get the same level of DIM by eating cabbage. The equivalent would be 3 cups per day, or 1/2 cup if consuming it cooked, as the cooking process concentrates DIM six-fold.)

Indole-3-Carbinol: This is another compound found in cruciferous vegetables, contributing to the estrogen-detoxifying effect. Research shows that supplementing at levels of 300 mg/day has been helpful in reducing estrogen levels when they are problematically high in the case of estrogen dominance.

Cod Liver Oil: This is one of the best dietary sources of omega-3 fatty acids, especially DHA and EPA which are not found in plant sources. Since inflammation is one of the major drivers of estrogen-dominance patterns (and has a high association with elevated stress levels due to cortisol’s pro-inflammatory effect), supplementing with cod liver oil helps reduce estrogen dominance at the root cause. Supplementation should be in levels of at least 2,000 mg daily, though I often prescribe levels that are twice or three-times this amount in my practice, depending on the patient.

B Vitamins: The metabolic pathway responsible for estrogen breakdown and excretion uses a variety of enzymes which require B vitamins as cofactors in order to function, especially B12 (100 μg), B6 (50-100 mg) and folic acid (800 μg daily). These methylation reactions are also important in supporting the 2-hydroxyestrone pathway in estrogen dominance.

Closing thoughts…

As if the symptoms of estrogen dominance aren’t difficult enough, the journey towards a diagnosis to explain the symptoms, and finding a treatment strategy that works for you in the context of your own life can add enormous loads of stress to an already challenging life experience. There is a whirlwind of information out there, which only adds to the confusion and frustration of trying to manage your health. It can be a lonely and scary place, but I want you to know that you’re not alone. Consider making an appointment with a functional medicine doctor who can deliver personalized care and help you achieve your health goals and keep your estrogen balance in check.

I’m Dr. Alexandra MacKillop, a functional medicine doctor, food scientist and nutrition expert.

I specialize in women’s nutrition & hormonal health, addressing concerns like longevity, fertility, postpartum, PCOS, endometriosis, and gut symptoms like bloating, constipation, diarrhea and more.

If you’re looking for a new way to approach your health, I’m here to help you through it.

Don’t miss out! Join the email list.

Love this post Share it!

Want more Grab a copy of my new book, The Postpartum Check-In !

Reminder: The information on this post or anywhere else on this blog or other writing is purely educational, and is not intended to diagnose, treat, prevent, or cure any health condition.

The post How to Fix Estrogen Dominance with Functional Medicine appeared first on Dr. Alexandra MacKillop.

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