Signs
Replenishing iron deficiency: when being tired isn't the whole story
You’re tired, but perhaps it’s not just stress, hormones, or a lack of sleep. What if your body has been running on empty iron stores for months?
You’re tired, but perhaps it’s not just stress, hormones, or a lack of sleep. What if your body has been running on empty iron stores for months?
You’re tired, but not in a way that a good night’s sleep can fix. You do your job. You care for others. You plan. You manage. You tell yourself you’re fine. Meanwhile, you notice you have less in reserve than you used to. Climbing stairs feels harder. Working out takes more effort. Your concentration slips faster. You might have heart palpitations, restless legs, hair loss, or feel dizzy more often.
It’s logical to blame stress. Doing too much. Hormones. Sleep deprivation. Maybe even burnout.
But we’re missing something important: it’s estimated that roughly one in six menstruating or pregnant women struggles with an iron deficiency. Children and teenagers going through growth spurts are also vulnerable, as iron is needed to create new cells. Teenage girls who are growing, eating selectively, and starting their periods are at even higher risk.
How are your iron levels, really? That’s the question that is often asked too late.
You can be overwhelmed and iron-deficient at the same time. You can have a busy life and be physically running on empty. And that combination is exactly what makes this type of fatigue so insidious.
Replenishing iron doesn’t start with just buying a supplement off the shelf. It starts with taking your symptoms seriously, getting your Hb and ferritin levels measured, finding the root cause, and then supplementing in a targeted way.
Iron is essential for transporting oxygen to your organs and muscles. It is necessary for the production of hemoglobin: the substance in red blood cells that carries oxygen throughout your body. With anemia caused by iron deficiency, oxygen cannot reach your cells as effectively, which can lead to symptoms like fatigue, shortness of breath, dizziness, and heart palpitations. Heavy menstrual bleeding is a well-known cause of iron-deficiency anemia.
But iron does more than just transport oxygen. It also plays a role in the production of neurotransmitters like serotonin and dopamine, in brain function, in cellular energy production, and in muscle strength. That’s why low iron stores can manifest in various ways. Not just as fatigue, but also as brain fog, hair loss, brittle nails, reduced athletic performance, restless legs, or headaches.
Eventually, this can lead to anemia. But your body may give you signals long before that happens.
This is perhaps the most important "aha" moment of the whole story. Hb tells you something about anemia. Ferritin tells you something about your iron stores.
Ferritin is the protein your body uses to store iron. You can think of it as your storage shed. Only when that shed is nearly empty does your hemoglobin level often start to drop significantly.
This means your Hb can still look normal, and your doctor might say everything is fine, while your ferritin is already low. You may not be officially anemic, but your body has less of a buffer.
Articles on iron deficiency in women emphasize this exact point: many women only receive attention or treatment once anemia has developed, even though symptoms can align with low iron stores much earlier. This doesn’t mean you should start interpreting your own lab results. It does mean you should feel empowered to ask more questions. Especially if you’ve been tired for a long time, have heavy periods, are losing hair, have restless legs, or notice that exercise suddenly feels much harder.
The symptoms of iron deficiency resemble things women often accept as normal for themselves. Tired. Dizzy. Brain fog. Easily out of breath. Restless legs. Hair loss. Brittle nails. Reduced concentration. Exercise suddenly feeling much harder.
These aren't symptoms that automatically make you think of iron. Especially not when your life is also just plain busy.
NRC recently highlighted the fact that many women go around with an iron deficiency without it being recognized; estimates range from 10 to 40 percent of women. De Volkskrant also wrote about iron deficiency as an underestimated problem in women, with symptoms such as persistent lethargy, heart palpitations, restless legs, brittle nails, and hair loss.
The point isn't that every tired woman has an iron deficiency. The point is that iron deficiency is common enough that it shouldn't automatically be dismissed as stress.
Women lose iron through menstruation. With heavy or prolonged periods, this can add up significantly. On average, a woman loses about 40 milliliters of blood per cycle. Internationally, more than 80 milliliters is considered heavy blood loss. In practical terms, this means using multiple full super-absorbency pads or tampons during a single cycle. With heavy periods, you sometimes cannot simply "eat enough" to fully compensate for the loss. You end up losing more than you can easily replenish through diet alone.
Pregnancy, childbirth, and breastfeeding can also put further pressure on iron stores. Moreover, a severe deficiency during pregnancy can have consequences, such as an increased risk of lower birth weight or complications related to blood loss during delivery.
That is why prevention is important. You don't want to start thinking about iron only when your reserves are already empty.
The updated dietary guidelines are shifting toward more plant-based eating and less meat. While this may make sense from a health and sustainability perspective, there is an important nuance when it comes to iron.
Meat provides not only protein and B vitamins but also heme iron. This is the form of iron that the body absorbs most easily. Plant-based foods primarily contain non-heme iron, found in legumes, whole grains, nuts, seeds, tofu, tempeh, and leafy green vegetables.
Plant-based iron is valuable, but it is less easily absorbed. The Netherlands Nutrition Centre states that your body absorbs about 25 percent of heme iron, while the absorption of non-heme iron can vary between 1 and 10 percent. Vitamin C helps with the absorption of non-heme iron, while coffee and tea can inhibit it.
This doesn't mean that eating less meat is automatically a problem. But it is something to take seriously for women who menstruate, feel tired, follow a vegetarian diet, or already have low iron stores.
The Dutch National Food Consumption Survey shows that the average iron intake in the Netherlands is 11.6 mg per day. Without supplements, that figure is 9.9 mg per day. Girls and women have lower average intakes than boys and men.
Due to menstruation, women more often need to pay extra attention to iron. At the same time, they consume less iron on average. And if the proportion of highly absorbable heme iron decreases due to eating less meat, you shouldn't assume it will just resolve itself.
Eating more plant-based is perfectly fine. But when it comes to iron, it requires more attention.
Preventing iron deficiency is smarter than waiting until you're depleted. Many people only think about supplementation when symptoms are already present. But ideally, you want to stay ahead of an iron deficiency.
Especially if you have heavy periods, eat little meat, are vegetarian, have started eating more plant-based, have been pregnant, are breastfeeding, or notice that your recovery is not as good as it used to be.
If you experience persistent fatigue, heavy periods, or recurring symptoms, don't just have your hemoglobin (Hb) checked—discuss your ferritin levels as well. This allows you to see if your reserves are slowly dropping before you are truly running on empty.
From there, you can make targeted adjustments with diet, add vitamin C to iron-rich meals, reduce coffee or tea consumption around mealtimes, and seek guidance from a doctor where necessary. This way, addressing iron deficiency isn't a desperate measure after the fact, but part of taking better care of your foundation.
Nutrition remains the foundation, but with iron, it's not just about what you eat. It's also about what you absorb.
Iron is not a mineral you should supplement blindly. While low iron is a problem, too much iron can also be undesirable. Excess iron can accumulate in the body and cause harm over time. Furthermore, frequent iron infusions are sometimes associated with side effects that are not yet fully understood. This is why iron supplementation does not fall into the "if it doesn't help, it won't hurt" category.
If an iron deficiency is diagnosed, a doctor may recommend supplementation. Especially in cases of clear deficiencies, anemia, or symptoms consistent with low iron stores, diet alone may not be enough. For anemia caused by low iron, iron pills are often prescribed, followed by a repeat blood test.
Iron supplements can cause side effects such as stomach upset, nausea, constipation, or dark stools. That is why professional guidance is advisable.
In menstruating women, menstrual blood loss is often the obvious cause. However, it should not automatically be assumed to be the only explanation. In men and postmenopausal women, iron deficiency must be investigated with extra care, as blood loss from the stomach or intestines could be the underlying cause.
If you have a diagnosed iron deficiency, you need to take it seriously. Sometimes, targeted supplementation is necessary. But for your daily foundation, your body is more complex than just one mineral.
Many women recognize this pattern. First you think: maybe it's magnesium. Then: maybe iron. Then: maybe B12. Then: maybe zinc. Then again: maybe hormones. Before you know it, you have a drawer full of bottles, but still no clear overview.
Iron does not work in isolation. Energy, absorption, mineral balance, nutrition, gastrointestinal function, stress, and recovery all play a role. Minerals and trace elements work together as part of various processes: oxygen transport, energy, muscle function, nerves, skin, hair, and hormonal balance.
That is why it is too simplistic to think: "I'm tired, so I'll just take one mineral and be done with it."
Sometimes you need to supplement iron. But your foundation requires the full spectrum.
SMPL72 fulvic acid is not an iron supplement and not a medicine. It is therefore not intended to treat a diagnosed iron deficiency. That must be clear. However, SMPL72 does fit into the broader concept of supplementation. Not by focusing on one isolated mineral, but by providing a natural spectrum.
SMPL72 contains fulvic acid with more than 72 minerals and trace elements that are naturally bound to the fulvic acid. In other words: they are not added by human hands. You take SMPL72 water as a daily supplement.
It is not a replacement for blood tests. It is not a replacement for iron therapy when required. It is, however, a way to support your foundation more broadly than by constantly reaching for another single bottle. Because your body doesn't think in terms of isolated minerals. Your body works through synergy.
Discuss your iron status if you recognize these signs:
* you have been feeling tired for a long time;
* you have heavy or prolonged periods;
* you are pregnant, have just given birth, or are breastfeeding;
* you feel dizzy easily;
* you experience heart palpitations;
* you get out of breath more quickly;
* you have restless legs;
* you are losing more hair than usual;
* your nails are brittle;
* your athletic performance is plummeting;
* you eat little or no meat;
* you feel burnt out, but rest doesn't help enough.
Take your symptoms seriously. Not just Hb, but ferritin as well.
For many women, this is the missing layer beneath fatigue. Not instead of stress or burnout, but alongside it.
You can be overloaded and have low iron stores. You can be busy and have too little physical buffer. You can try to do everything right and still develop deficiencies.
That is why the best question is not: “Am I just tired?”
But:
what is my body running on right now?
Replenishing iron deficiency doesn't start with just taking supplements. It starts with recognizing the signs in time. Thinking about your diet. And targeted supplementation when necessary.
When an iron deficiency is diagnosed, iron sometimes simply needs to be replenished. But your daily foundation requires more than just one mineral.
Not for another empty promise. But for nutrition, recovery, testing, and a complete mineral spectrum that matches how your body actually works.\
Read more here about how fulvic acid works
What to look out for when you take a mineral complex .
Everything you want to know about SMPL72, enrollment, and how it works. Still have questions? We've got the answers.
This varies from person to person and depends primarily on your starting point. Fulvic acid supports the absorption and bioavailability of the minerals you already get through your diet or supplements. The faster your body responds to that improved availability, the sooner you will notice a difference. People with low mineral levels or higher requirements often experience changes sooner than those who are already well-nourished. Some users notice more clarity or a calmer energy level within a few days, while for others, it happens more gradually over a period of weeks. In SMPL72, the fulvic acid is naturally bound to 72 different minerals and trace elements. The most important thing is consistency: fulvic acid doesn't act as a quick stimulant, but as a daily absorption mechanism that builds its effect step by step.
People often get some minerals from various sources, but usually not enough. Furthermore, they are often poorly absorbed by the digestive system. It is important to realize that most supplements are synthetic, and in the case of minerals, they are essentially just rock. These contain large molecules that your body can barely absorb, if at all. We have previously written a blog post about the ins and outs of supplementation; feel free to check out our blog section. You might already be taking magnesium or zinc, but keep in mind that you are only taking one or two of the 60 minerals your body needs every day. When you think in terms of a complementary approach, you cannot simply pick one mineral out of the entire spectrum.
Fulvic acid is not an energy booster, nor is it a substance that provides an immediate effect on fatigue or concentration. What it does is something more fundamental: it supports the way your body absorbs and utilizes minerals. And that very point—the utilization of minerals—plays a bigger role for many people than they realize. Fatigue, "brain fog," and concentration issues often have multiple causes, but in orthomolecular practice, it is frequently observed that mineral metabolism and electrolyte balance are significant factors. Minerals are necessary for processes such as: - signal transmission in the nervous system - energy production in the mitochondria - oxygen transport - fluid balance in and around the cell - enzyme activity involved in focus, alertness, and metabolism If those minerals are insufficiently available at the cellular level, the body cannot perform these processes efficiently. Fulvic acid cannot solve that on its own, but it makes minerals chemically smaller, more soluble, and more accessible to the body. As a result, the minerals you ingest through food or supplements can be better utilized where they are needed. Many users experience a more stable energy level, greater clarity, or fewer fluctuations throughout the day. Not because fulvic acid provides a direct stimulant, but because minerals are able to do their job better. This is a fundamentally different mechanism than that of caffeine, stimulants, or "energy boosters." It remains important to emphasize: fulvic acid is not a treatment for fatigue or concentration issues. It merely supports the biological foundation upon which energy, clarity, and nerve function operate. What an individual notices from it naturally also depends on diet, hydration, lifestyle, and individual needs.
Fulvic acid has a very mild, almost neutral taste. Most people barely notice it when they add a few drops to a glass of water. Some describe it as having a very light mineral flavor, but you usually only notice it if you are really paying attention. SMPL72 is pure fulvic acid with no additives, which keeps the taste soft, clean, and subtle. You don't need to worry about a bitter, sharp, or "muddy" taste, which is common in impure or thick humic products.Most users find that it simply tastes like water with a very faint hint of minerality. This makes it easy to use every day, even for children or people who are sensitive to strong flavors. It is best to take SMPL fulvic acid in a glass of chlorine-free water. Fruit juice is also an option, but avoid hot drinks. It is very easy to use.
Add 7-10 drops daily to a glass of (chlorine-free) water (fruit juice is also an option, but avoid hot drinks). For children: 1 drop per 10 kg of body weight. Feel free to increase the dose during illness or intense physical exertion. For maximum absorption: take 30 minutes before a meal. For an energetic start to the day: take in the morning on an empty stomach. For recovery: take immediately after sports or physical exertion. SMPL72 is a powerful detox, so be sure to drink plenty of water. If you are pregnant or taking medication, build up the dose gradually and monitor how your body reacts. When in doubt, consult your doctor or midwife.
