Table of Contents
Table of Contents
As a physician, I often tell my patients that entering their 40s can feel like crossing a new health milestone. Hormonal shifts, a slowing metabolism, and changing nutrient needs all start to play a role in how you feel, and, if you’re like me, your body could use some extra support. That’s where smart supplementation comes in.
Supplements tailored for women over 40 help bridge nutritional gaps in our diets, support bone health, protect heart and brain function, and help us maintain steady energy levels. With perimenopause and menopause on the horizon, here are the top supplements I recommend for women in their 40s, including tips on how to take them for maximum absorption, to help you thrive and maintain vibrant health.
Vitamin B12 is crucial for healthy nerves, supports red blood cell formation, and helps keep your energy levels up. Levels of this important vitamin tend to decline as we get older, in part due to autoimmune conditions, gastrointestinal disorders, and increased use of medications that interfere with absorption.1 Women with restricted diets, including those following vegetarian or vegan diets, are also at increased risk of not getting enough.
Natural sources of B12 include animal-based foods such as eggs, fish, poultry, and dairy. If you follow a plant-based diet, fortified cereals or nutritional yeast can help, though supplements are often necessary. Interestingly, vitamin B12 in dairy products is about three times more readily absorbed than in meat, fish, or poultry. And B12 from supplements is about 50% more bioavailable than from food.
Women over 40 need 2.4 micrograms of vitamin B12 daily. Those who are pregnant or breastfeeding need more, 1.6 and 2.8 micrograms, respectively.2 You don’t need to worry about taking too much vitamin B12, since your body removes any excess you consume (bright yellow pee, anyone?).
Calcium is one of the most important supplements for women over 40. It supports strong bones and teeth, helps regulate muscle function, and contributes to nerve signaling.
As estrogen levels fluctuate and eventually decline during perimenopause and menopause, calcium loss accelerates, increasing the risk of osteoporosis. In fact, women lose about 2% of their bone density every year starting one to three years before menopause, resulting in a total loss of about 10 to 12%.3
Dairy products, leafy greens (like spinach and kale), sardines with bones, and calcium-fortified plant milks and juice are great dietary sources. For women who struggle to meet their daily needs through food, supplements can help maintain optimal bone density.
There are many forms of supplemental calcium, including calcium citrate and carbonate. I often recommend calcium bisglycinate as a highly absorbable form. Always take calcium supplements with a meal and take no more than 500 milligrams at a time to increase absorption.4
Women in their 40s need 1,000 milligrams daily.4
Often called the “sunshine vitamin,” Vitamin D plays key roles in women’s health, including calcium absorption, immune function, and mood regulation. Due to its role in calcium absorption, getting enough vitamin D is crucial for maintaining strong bones in women over 40. In fact, osteoporosis is particularly common in menopausal women with low vitamin D levels.3
While sunlight is the best natural source, foods like fatty fish (including salmon and rainbow trout), mushrooms exposed to ultraviolet light, egg yolks, and fortified foods provide some vitamin D. Still, many women need vitamin D supplements to maintain healthy levels, particularly those who are older, live in colder climates, cover their skin, or have darker skin.
Women in their 40s should get at least 15 micrograms, or 600 international units (IU), daily. If you take a supplement, choose vitamin D3, which is more effective at raising blood levels than vitamin D2.5
If you often feel tired, experience muscle cramps, have migraine, or struggle with sleep, magnesium may be your missing mineral. This nutrient supports over 300 biochemical reactions in the body, including nerve and muscle function, energy production, and mood balance. And research suggests most of us aren’t getting enough from our diets.6
Good dietary sources include nuts, seeds, beans, spinach, and dark chocolate. However, since most women don’t meet their body’s needs through food alone, magnesium is one of the best supplements for women over 40. Magnesium supplements come in a variety of different forms, but I often recommend magnesium glycinate for promoting relaxation, better sleep, and reduced migraine frequency without the gastrointestinal effects that are more common with some other forms.
Women over 40 should aim for at least 320 milligrams of magnesium daily. Pregnant women need more, 360 milligrams.6
Potassium is an essential mineral that helps regulate blood pressure, balance fluids, and support heart health. Women in their 40s, particularly those managing high blood pressure, benefit from ensuring they’re getting enough.
Research shows most of us don’t meet our recommended potassium intake. And not getting enough potassium can lead to high blood pressure, increased kidney stone risk, and decreased bone density.
While bananas often come to mind when we think of potassium-rich foods, apricots, lentils, beans, winter squash, prunes, and leafy greens are all excellent sources. Many salt substitutes contain potassium in the form of potassium chloride as a substitute for sodium chloride (table salt) and may contribute significantly to overall potassium intake. Most potassium-containing supplements provide no more than 99 milligrams per serving.
Women over 40 should aim for 2,600 milligrams of potassium daily. Pregnant and breastfeeding women need more, 2,900 and 2,800 milligrams, respectively.7
Heart health becomes increasingly important in your 40s, and omega-3 fatty acids play a vital role in helping to reduce inflammation and maintain cardiovascular wellness. They may also support brain function and mental health.8
Fatty fish (including salmon, sardines, and mackerel), walnuts, chia, and flaxseeds are some of the best dietary sources of omega-3s. Other foods, like certain brands of eggs, yogurt, milk, and juices, have omega-3s added to them. Women who follow vegetarian or vegan diets and those who don’t eat much fatty fish (less than two to three servings per week) should talk with their healthcare provider about supplementing with fish oil or algae-based omega-3s to ensure they meet their needs.
Women over 40 should aim for 1.1 grams of omega-3s daily. Pregnant and breastfeeding women need more, 1.4 and 1.3 grams, respectively.8
Gut health impacts practically everything, from digestion to mood to immune function. As hormonal changes influence gut balance in your 40s, maintaining a healthy gut microbiome becomes especially important.
Probiotics are beneficial microorganisms, including bacteria and yeast, that populate your gut and provide health benefits. They are found naturally in fermented foods like yogurt, kefir, kimchi, and sauerkraut, but can also be taken as a supplement.
Studies suggest that probiotics (especially strains of Lactobacillus) may benefit women throughout their lives, including supporting vaginal, metabolic, and digestive health, promoting menstrual regularity in women with polycystic ovary syndrome (PCOS), and easing peri/menopause symptoms.9,10
If you do only one thing to benefit your health in your 40s, increase your fiber intake! Fiber isn’t just about digestion; it also supports heart health, hormone balance, and stable blood sugar levels.11
Most women in their 40s don’t meet their recommended daily fiber intake of 25 grams.12 Whole grains, beans, fruits, and vegetables are excellent fiber sources. If your intake is low, a daily fiber supplement can help you meet your needs and improve overall health.
Antioxidants are compounds that help protect your cells from oxidative stress, which contributes to aging, inflammation, and chronic disease. Vitamins C and E, selenium, and plant compounds like flavonoids all act as antioxidants.
Berries, green tea, dark chocolate, and colorful vegetables are rich in these nutrients. Including antioxidant supplements in your daily regimen may further support healthy skin, immunity, and vitality.
Yes, hormonal fluctuations during perimenopause and menopause can change your nutrient needs. Calcium, vitamin D, magnesium, and omega-3s become even more important, while some women also benefit from herbal support, like black cohosh or evening primrose oil, to address peri/menopause symptoms. It’s wise to tailor your routine with your healthcare provider’s guidance.
Eating a well-balanced diet is the best way to meet your body’s nutrient needs. But a women’s multivitamin or targeted supplements can help fill potential nutrient gaps in your diet and address nutrient shortfalls based on your individual needs.
Feeling your best in your 40s means addressing your body’s unique and changing needs. A supplement routine that supports bone strength, brain health, digestion, metabolic health, and mood regulation can help you thrive in this decade and beyond.
Before starting any new supplement, I recommend consulting your healthcare provider and getting basic bloodwork done, especially for vitamin D, B12, and iron levels, so you know where you stand. And when choosing supplements, always opt for high-quality, third-party-tested products and follow dosing recommendations carefully.
Remember, supplements work best alongside healthy habits, like a nourishing diet, regular exercise, restful sleep, and stress management. In your 40s and beyond, those daily choices shape your vitality for decades to come!
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This Wellness Hub does not intend to provide diagnosis, treatment, or medical advice. Read more. The content provided on this Wellness Hub is for informational purposes only. Please consult with a physician or other healthcare professional regarding any medical or health-related diagnosis or treatment options. Information on this Wellness Hub should not be considered as a substitute for advice from a healthcare professional. The claims made about specific products throughout this Wellness Hub are not approved to diagnose, treat, cure, or prevent disease.
