Micronutrition, Pregnancy and Postpartum: When the Body Is Running on Empty

Growing a baby, breastfeeding, recovering from birth, living on broken nights, carrying an enormous mental load… all of this asks a lot from the body. And sometimes, several months or even years later, some women still feel exhausted, irritable, anxious, or “foggy,” without really understanding why.

What if it wasn’t just “mom life”? What if the body was simply running on empty?

What exactly is micronutrition?

Nutrition is often understood through the main food groups: proteins, carbohydrates and fats. These are macronutrients. They provide energy and help build the body.

Micronutrition focuses on the elements the body needs in smaller quantities, but that play a huge role in how it functions: vitamins, minerals, trace elements, essential fatty acids…

For example: iron, magnesium, vitamin D, vitamin B9, zinc, iodine, omega-3, calcium. These micronutrients do not provide calories, but they are involved in essential functions: energy, immunity, hormonal balance, the nervous system, sleep, mood, recovery, baby’s development, and the prevention of certain deficiencies.

During pregnancy, the body prioritizes the baby

During pregnancy, the body is creating a human being. It therefore mobilizes a huge amount of resources: proteins, fats, carbohydrates, vitamins, minerals…

And in most cases, the baby comes first. The body draws from what it has to support the baby’s development.

That is reassuring for the baby, but it also means that if the mother enters pregnancy with already fragile reserves, or if her needs are not sufficiently covered, she may gradually become depleted, or even deficient.

The tricky part is that the effects are not always felt immediately. A deficiency can show up several months later. And rebuilding those reserves takes time: sometimes 6 months, sometimes 1 year, sometimes longer, depending on the starting point, diet, gut absorption, sleep, stress and the support in place.

This is also why some women collapse in postpartum after having “held it together” during pregnancy.

Postpartum: not just a hormonal drop

After birth, there is of course a major hormonal drop. Estrogen and progesterone fall sharply. Breastfeeding can also affect hormonal balance through prolactin and oxytocin.

But that is not the whole story.

Postpartum often comes after months during which the body has given a lot. Add to that interrupted nights, stress, mental load, sometimes breastfeeding, sometimes closely spaced pregnancies, and sometimes a less regular diet because there is no longer time to take care of yourself.

As a result, some mothers end up with an exhausted nervous system, very low energy, unstable mood, pain, difficult recovery, non-restorative sleep, or a feeling of mental fog.

And no, it is not necessarily inevitable.

Closely spaced pregnancies: a real recovery issue

When pregnancies follow one another closely, the body has less time to rebuild its reserves.

Depending on each woman’s starting point and individual needs, it can take several months, or even several years, to fully recover nutritionally and micronutritionally.

This does not mean women should feel guilty. Many simply never received this information. But it can help explain why some mothers, after several closely spaced pregnancies or a twin pregnancy, may feel completely drained from the inside.

It is not “all in your head.”
It is not necessarily a lack of willpower.
Your body may simply need support.

Key micronutrients during pregnancy and postpartum

This is not about randomly self-supplementing. Every woman is different, and some vitamins or minerals can be problematic in excess. But certain micronutrients often come up when talking about the needs of pregnancy and postpartum.

1. Vitamin B9

Vitamin B9, or folic acid, is well known before conception and in early pregnancy for supporting the baby’s neural tube development.

But it also plays a role in cell division, energy, anemia, and works alongside other B vitamins such as B6 and B12. It is often presented as “useful for the baby,” but it can also be important for the mother.

2. Iron

Iron is essential to prevent or correct anemia. A deficiency can lead to deep fatigue, shortness of breath, low energy and difficult recovery.

But iron should not be taken randomly: too much iron can also be harmful. A blood test and medical advice are essential before supplementing.

3. Vitamin D

Vitamin D is involved in immunity, bone health and overall balance, and works in synergy with calcium and magnesium.

It is often recommended during pregnancy, but it can also be useful to check vitamin D levels postpartum, especially in cases of persistent fatigue.

4. Magnesium

Magnesium is a key micronutrient for the nervous system. It is involved in mood regulation, muscle relaxation, sleep, stress, certain contractions and restless legs.

It is a mineral that is often heavily used during periods of stress, lack of sleep and mental overload. In other words, it can be particularly important during postpartum.

5. Omega-3

Omega-3s are essential fatty acids. They support the proper functioning of the brain, cells, eyes, hormones and nervous system.

They are found in small oily fish such as sardines, mackerel and anchovies, but also in certain oils and seeds such as flaxseed, chia and hemp. Some studies also explore the link between omega-3 deficiency and the risk of postpartum depression. In any case, their role in overall balance is major.

6. Iodine and zinc

Iodine is important for the thyroid, which is highly solicited during pregnancy. Zinc is involved in immunity, healing, the nervous system, fertility and many metabolic functions.

Again, the goal is not to take everything as a supplement, but to understand that these micronutrients are part of a broader balance.

7. Calcium

Calcium is known for bone health, but it is also involved in other body functions. During breastfeeding in particular, needs may be higher.

We often think of dairy products, but calcium can also be found in sardines, sesame, almonds, certain mineral waters and leafy green vegetables.

Why do some women absorb nutrients poorly?

Having a varied diet is not always enough if the body does not absorb nutrients properly.

Nutrient absorption largely happens in the gut. However, stress, lack of sleep, chronic inflammation, ultra-processed foods, pollution or certain digestive imbalances can interfere with this absorption.

That is why a global approach matters. Deep fatigue cannot always be solved with a single supplement. Sometimes it is necessary to look at diet, sleep, stress, digestion, blood tests, pregnancy history, breastfeeding and hormonal cycles.

The body works as a system. When one pillar is weakened, the others can follow.

A “nourishing” diet for pregnancy and postpartum

Pregnant women are often told what they are not allowed to eat. They are told less often what can genuinely support them.

A supportive diet during pregnancy and postpartum starts with simple foundations:

• Half the plate with vegetables and fiber: legumes, root vegetables, squash, leafy greens
• One quarter with protein: eggs, small fish, quality meat, legumes
• One quarter with carbohydrates: choose sweet potatoes, potatoes and whole grains rather than white flours
• Add wherever you can: flaxseeds, chia seeds, sesame seeds, nuts and seeds — in smoothies, salads, yogurts
• Stay hydrated and limit coffee and tea, which can interfere with iron absorption in particular

The goal: follow these guidelines 80% of the time. For the remaining 20%, enjoy yourself without guilt.

Supplements: useful, but not randomly

Today, the supplement market is booming. But not all products are equal.

A supplement can be very useful when it is well chosen, well dosed, well absorbed and adapted to the person’s needs. But it can also be useless if the form is poorly absorbed, if the dosage is too low, or if the combinations are not relevant.

For example, some forms of magnesium are better absorbed than others. Omega-3 supplements should contain sufficient amounts of EPA and DHA. Certain nutrients should not necessarily be taken together. Iron, in particular, needs to be carefully supervised.

The most important thing is to seek advice from a trained professional, especially during pregnancy, breastfeeding or in case of persistent symptoms.

A doctor, midwife, nutritionist, micronutrition specialist or qualified healthcare professional can help assess the situation and, if needed, prescribe blood tests.

When should you seek help?

It may be useful to consult a professional if you experience:

intense fatigue that does not go away, even when you sleep a little better;
lasting mental fog;
unusual irritability;
strong anxiety;
persistent sleep problems;
significant hair loss;
muscle or joint pain;
periods or PMS that have become very difficult;
very slow recovery after pregnancy;
the feeling that you are never “getting back on your feet.”

These signs do not necessarily mean there is a deficiency. But they deserve to be taken seriously.

Depending on your situation, it may be worth discussing a blood test with a professional, including iron, ferritin, hemoglobin, vitamin D, certain B vitamins, magnesium, thyroid markers, zinc, iodine or other markers.

Three powerful foods to add more often

To start simply, some foods can become real allies:

• Sardines: rich in omega-3, protein and calcium when eaten with the bones, and easy to keep in the cupboard.
• Eggs: practical, protein-rich and useful for quick meals.
• Nuts and seeds: walnuts, almonds, cashews, flaxseeds, chia seeds, sesame… to add to yogurt, salads, porridge, smoothies or as a snack.

These are simple small habits, but repeated regularly, they can help nourish the body more deeply.

Your fatigue deserves to be heard

Postpartum is demanding. Yes, it is normal to be tired after having a baby. Yes, lack of sleep is hard. Yes, emotional balance can be shaken.

But extreme fatigue that lasts for months or years should not be normalized. Your body may need help, time, nutrients, support, movement, rest and gentleness.