We are what we eat.
This simple saying applies throughout every stage of life. However, as we enter midlife, nutrition becomes even more important.
Perimenopause is a time of profound biological change. It is not simply a transition happening in the reproductive system — it is a whole-body adaptation involving multiple interconnected systems.
As hormone patterns shift, the body’s nutritional needs also evolve.
The nutrients that supported us through our 20s and early 30s may not provide the same level of support for the changing demands of midlife, including:
- Maintaining muscle and metabolic health
- Supporting brain function and emotional resilience
- Protecting bone and cardiovascular health
- Supporting healthy digestion and nutrient absorption
- Providing the building blocks needed for cellular repair and healthy ageing
This is why what we eat when we approach 40s can have a powerful influence on how we experience this transition and how we age long term.
10 Key Nutrients to Prioritise After 35
1. Protein: The Foundation of Midlife Metabolism, Muscle and Vitality
Protein is one of the most important nutrients to prioritise during midlife because it provides the amino acids needed to build and maintain almost every structure in the body, including muscles, enzymes, hormones, neurotransmitters and immune proteins. While protein is important throughout life, its role becomes increasingly significant during perimenopause as changing oestrogen levels, ageing and lifestyle factors can contribute to gradual loss of muscle mass and changes in body composition.
Muscle is more than a source of strength - it is one of the body’s largest metabolic organs. Maintaining healthy muscle supports glucose regulation, insulin sensitivity, energy metabolism and physical resilience. Adequate protein intake also provides amino acids needed for neurotransmitter production, supporting the nervous system and functions such as mood, focus and cognitive performance.
During perimenopause, the body may become less efficient at using dietary protein to stimulate muscle protein synthesis, a process sometimes referred to as anabolic resistance. This means many women may benefit from slightly higher protein intake compared with earlier adulthood, particularly when combined with resistance exercise.
For many women during perimenopause and menopause, a practical target is:
1.0–1.2 g protein per kilogram of body weight per day
Women who are physically active, strength training, or focused on maintaining muscle mass may benefit from:
1.2–1.6 g protein per kilogram of body weight per day
Rather than consuming most protein in one meal, spreading intake throughout the day helps provide a steady supply of amino acids to support muscle maintenance.
Protein-rich foods:
High-quality animal sources:
- Eggs
- Fish and seafood
- Chicken
- Lean meat
- Greek yoghurt
Plant-based sources:
- Tofu and tempeh
- Lentils
- Beans
- Chickpeas
- Nuts and seeds
2. Healthy Fatty Acids: Essential for Brain and Cellular Health
Healthy fats are essential building blocks. During perimenopause, oestrogen fluctuates before gradually declining, influencing brain function, mood and inflammation. Omega-3 fatty acids, particularly DHA (docosahexaenoic acid) and EPA (eicosapentaenoic acid), play complementary roles in supporting the nervous system. DHA is one of the most abundant fatty acids in the brain and a major structural component of neuronal cell membranes. EPA, although present in much smaller amounts, contributes to signalling pathways.
Omega-3 fatty acids contribute to:
- Brain structure
- Cell membrane health
- Healthy inflammatory responses
- Cardiovascular wellbeing
Because the brain is highly dependent on fats, adequate DHA and EPA intake is especially relevant during midlife when many women experience cognitive changes.
Target: 250–500 mg EPA+DHA daily
Food sources:
- Salmon
- Sardines
- Mackerel
- Chia seeds
- Flaxseed
- Walnuts
3. Dietary Fibre: The Foundation of Gut Health
Dietary fibre is more than just a nutrient for digestion; it is fuel for the trillions of beneficial microbes living in our gut. Unlike other carbohydrates that are broken down and absorbed earlier in digestion, certain fibres reach the large intestine, where they are fermented by gut bacteria to produce short-chain fatty acids (SCFAs), such as butyrate.
Butyrate is especially important because it is the main energy source for the cells lining our colon, helping maintain a strong gut barrier and a healthy intestinal environment. SCFAs also help maintain a favourable gut pH, support beneficial bacteria, and regulate communication between the gut, immune system and metabolism.
During perimenopause, fibre becomes increasingly important because the gut microbiome plays a role in the oestrogen–gut connection, influencing how oestrogen metabolites are processed and recycled. A fibre-rich diet supports a healthier digestive ecosystem, which contributes to overall metabolic health and hormone wellbeing.
NZ recommendations:
Women 31+: 25 g/day
A practical midlife target: 30–40 g/day
Food sources:
- Vegetables
- Legumes
- Oats
- Chia seeds
- Flaxseed
- Berries
4. Choline: The Nutrient Connecting Brain and Metabolic Health
Choline is often overlooked, but it plays an important role in midlife health, particularly as women transition through perimenopause.
Choline is an essential nutrient needed to produce acetylcholine, a neurotransmitter involved in memory, learning, focus and communication between nerve cells. Oestrogen is closely connected with the cholinergic system, as it influences the production, release and function of acetylcholine in the brain. As oestrogen levels fluctuate and eventually decline during the menopausal transition, supporting the nutrients involved in brain signalling becomes increasingly important for maintaining cognitive function and mental clarity.
Beyond the nervous system, choline also supports metabolic health by contributing to the formation of phosphatidylcholine, a key component of cell membranes, and helping the liver package and transport fats. This makes choline an important nutrient for supporting both brain resilience and healthy metabolism during midlife.
Recommended intake for women:
425 mg/day, potentially higher for women experiencing perimenopausal symptoms like brain fog
Food sources:
- Eggs
- Salmon
- Soybeans
- Chicken
- Beans
5. Vitamin D: Supporting Bones, Muscles, Mood and Immunity
Vitamin D becomes increasingly important during midlife because it plays a role far beyond bone health. Often referred to as the “sunshine vitamin”, vitamin D is produced in the skin when exposed to sunlight and then converted in the body into its active form, where it functions more like a hormone by influencing the expression of hundreds of genes.
As we age, our ability to produce vitamin D from sunlight naturally declines due to changes in skin structure, reduced efficiency of vitamin D synthesis, lifestyle factors and less sun exposure. This makes maintaining adequate vitamin D status increasingly important as women enter perimenopause and menopause.
Vitamin D supports calcium absorption and bone mineral maintenance at a time when declining oestrogen can accelerate bone loss. It also contributes to muscle function, immune regulation and normal nervous system function, with vitamin D receptors found throughout the brain where it may influence neurotransmitter activity and mood regulation. Ensuring adequate vitamin D intake helps support the body’s adaptation through midlife, contributing to healthy bones, physical resilience, immune balance and overall wellbeing.
NZ recommendation:
Women 19–50: 5 μg/day
Women 51+: 10 μg/day
Sources:
- Sun exposure
- Fatty fish
- Egg yolks
- Fortified foods
6. Vitamin K: Supporting Healthy Calcium Balance
Vitamin K becomes increasingly important during midlife because it helps the body use calcium effectively. While vitamin D supports calcium absorption from the digestive system, vitamin K activates specific proteins that help direct calcium into bones, supporting healthy bone mineralisation. This relationship becomes especially relevant during perimenopause and menopause, as declining oestrogen can increase bone turnover and accelerate bone loss.
Among the different forms of vitamin K, vitamin K2 as menaquinone-7 (MK-7) has attracted particular interest because it is highly bioavailable and remains active in the body for longer compared with some other forms of vitamin K. MK-7 activates osteocalcin, a protein involved in binding calcium within bone, and matrix Gla protein (MGP), which helps regulate calcium movement in soft tissues. Through these pathways, vitamin K2 contributes to maintaining healthy bones and supporting normal calcium metabolism.
NZ recommendation:
Women 31+: 60 μg/day
Sources:
Vitamin K1 (phylloquinone):
- Kale
- Spinach
- Broccoli
- Other green leafy vegetables
Vitamin K2 (menaquinones):
- Natto (fermented soybeans)
- Certain fermented foods
- Some aged cheeses
7. Vitamin B3 (Niacin): Supporting Cellular Energy and Healthy Ageing
Vitamin B3, also known as niacin or niacinamide, plays a fundamental role in how our cells create and use energy.
At the heart of Vitamin B3’s importance is its role in producing NAD⁺ (nicotinamide adenine dinucleotide), a molecule found in every cell of the body that is essential for cellular energy production. NAD⁺ acts like a cellular “energy currency”, helping convert nutrients from food into energy that our cells can use. It also plays an important role in:
- Mitochondrial function (the energy centres of our cells)
- Cellular repair processes
- DNA maintenance
- Healthy ageing pathways
As we age, NAD⁺ levels naturally decline, which has attracted significant scientific interest because of its connection with cellular resilience, metabolism and longevity.
The NZ recommended dietary intake (RDI) for adult women is approximately:
14 mg niacin equivalents (NE) per day
The body can also produce small amounts of niacin from the amino acid tryptophan.
Sources:
- Chicken and turkey
- Salmon and tuna
- Lean meat
- Peanuts
- Mushrooms
- Whole grains
- Legumes
8. Magnesium: The Mineral of Metabolism and Relaxation
Magnesium is one of the most important minerals for midlife health, yet many women do not consume enough through their diet. It is involved in more than 300 biochemical reactions throughout the body, including those responsible for energy production, muscle function, nerve signalling and glucose metabolism.
Magnesium is required for the formation and use of ATP (adenosine triphosphate), the primary energy molecule that powers our cells. During perimenopause, many women experience changes in sleep, stress resilience, muscle recovery and energy levels, making magnesium’s role in nervous system regulation and cellular metabolism particularly relevant.
Magnesium also contributes to normal muscle relaxation, electrolyte balance and the regulation of neurotransmitters involved in calm and relaxation. Adequate magnesium intake supports the body’s ability to adapt to the changing demands of midlife.
Recommended intake for women 31+: 320 mg/day
For women approaching menopause: increase to 320 - 400 mg/day
Sources:
- Pumpkin seeds
- Almonds
- Dark chocolate
- Spinach
- Legumes
9. Iron: Particularly Important During Perimenopause
Iron is an essential nutrient for energy, but its importance changes significantly during the menopausal transition. Iron forms part of haemoglobin, the protein in red blood cells responsible for transporting oxygen throughout the body. It is also required by mitochondria, the energy-producing structures inside cells, to create ATP efficiently.
During perimenopause, women who still experience menstruation, particularly those with heavier or longer periods, may have increased iron losses and a higher risk of deficiency. Low iron stores can contribute to fatigue, reduced exercise capacity, difficulty concentrating and feeling physically depleted. However, once menstruation stops, iron requirements decrease significantly because monthly blood loss is no longer occurring.
When it comes to iron, more is not always better. The body tightly regulates iron because excess free iron can promote oxidative stress and cellular damage. Effective iron nutrition depends not only on how much iron we consume, but also on how well it is absorbed, transported and utilised by the body.
For this reason, the best approach is to prioritise highly bioavailable food sources of iron, particularly heme iron from animal foods, which is more readily absorbed by the body. Plant-based sources such as legumes, whole grains and leafy greens can also contribute iron intake, especially when combined with vitamin C-rich foods to improve absorption.
Iron supplementation should be approached thoughtfully, particularly for women after menopause when iron requirements decrease. If supplementation is needed, factors such as the form of iron, dose, tolerability and evidence for absorption and effectiveness should be considered. Testing iron status, including markers such as ferritin, can help guide appropriate decisions rather than supplementing unnecessarily.
Recommended intake:
Premenopausal women: 18 mg/day
Postmenopausal women: 8 mg/day
Sources:
- Red meat
- Seafood
- Lentils
- Beans
- Pumpkin seeds
10. Antioxidants: Supporting Cellular Health and Healthy Aging
Every cell in the body produces reactive oxygen species (ROS) as a natural by-product of energy production. In healthy amounts, these molecules play important roles in normal cellular signalling.
However, as we age, the balance between oxidative stress and the body’s natural antioxidant defence systems can become more challenging to maintain. Antioxidants help protect cellular components, including DNA, proteins and cell membranes from excessive oxidative damage. During midlife, supporting antioxidant defence becomes increasingly important because ageing, lifestyle factors, environmental stressors and hormonal changes can influence cellular resilience.
A diet rich in colourful plants provides a wide range of antioxidant compounds, including polyphenols, carotenoids and vitamins C and E, which work together to support cellular protection, healthy inflammation balance and long-term vitality.
Important sources:
- Berries
- Green tea
- Colourful vegetables
- Herbs and spices
A diverse plant-rich diet provides thousands of naturally occurring protective compounds.
Frequently Asked Questions About Perimenopause Nutrition
1. Should I eat fewer calories during menopause?
Not necessarily. The focus should shift from restriction to nourishment. Prioritising protein, fibre and nutrient density is often more valuable than simply eating less.
2. Do I need to avoid carbohydrates during perimenopause?
No. Quality matters more than elimination. Choose whole grains, vegetables, legumes, fruit. Pair carbohydrates with protein and healthy fats.
3. Can food balance my hormones?
Nutrition cannot replace hormones or stop natural hormonal changes. However, nutrients support the systems involved in hormone production, metabolism and communication.
4. Should every woman take menopause supplements?
Not necessarily. Food comes first. Supplements may help fill nutritional gaps when dietary intake is insufficient.
5. What is the most important nutrient after 35?
There is no single answer. However, protein is one of the most important priorities because muscle health influences metabolism, energy and healthy ageing.
Final Thought
Perimenopause is not a sign that your body is breaking down.
It is a transition where your body requires a different kind of support.
The choices you make today — the food you eat, the nutrients you provide, and the habits you build — become the foundation for your future health.
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Disclaimer - This content is for general informational purposes only and is not intended to imply benefits of any specific product.