Does it feel like your weight is stuck even though you are fully sticking to your plan? The cause might not be the diet itself, it could be a small deficiency in certain vitamins or minerals you have not noticed yet.
Any weight-loss plan runs on a calorie deficit, meaning you eat less than usual. Over the long run, this can lead to a deficiency in certain vitamins and minerals. That is exactly why we always tell clients starting a weight-loss journey to make sure their plan is varied, that the amount of food is not cut too drastically, and to schedule a "diet break" periodically into the journey, every 2 to 3 months of sticking to a deficit.
Some people do not take this advice seriously, and after a while of sticking to a strict plan, the problems that come with vitamin and mineral deficiencies start to show up. And it is not unusual at all for one of the most common of these problems to be difficulty losing weight.
In this post we will go through the most common vitamins and minerals whose deficiency makes weight loss harder, how exactly they make it harder, and the steps you should take to avoid any deficiency happening in the first place.
The Most Common Vitamin and Mineral Deficiencies That Stall Weight Loss
Vitamin D and insulin resistance
Most people in the Gulf region are deficient in this one despite our bright sun. A vitamin D deficiency can worsen insulin resistance, increase inflammation in the body, and disrupt leptin (your satiety hormone), so hunger stays constant and your appetite ends up out of sync. On top of that, low vitamin D is linked to increased fat storage and hormonal disruption.
Iron (ferritin) and constant fatigue
When iron levels drop, you start feeling significant fatigue and exhaustion, and thyroid function is affected and slows down, which lowers your basal metabolic rate (the calories your body burns just existing). That fatigue and exhaustion make exercise feel difficult, you constantly feel like you have no energy and no drive, sluggish and tired, and all of that makes weight loss harder.
Vitamin B12 and cellular energy
This vitamin is essential for cellular energy, and a deficiency leads to weakness, fatigue, lower fitness, strength, and endurance, all of which make movement in general harder, and exercise especially harder since it demands more strength.
Magnesium and your stress hormone
Magnesium helps activate certain enzymes in the body that work on burning and using energy, and a deficiency gets in the way of that process. It also raises cortisol, your stress hormone, and elevated cortisol throws off blood sugar levels and increases fat storage.
Iodine and thyroid function
Iodine is well known for its role in thyroid function and hormone production, and a deficiency can lead to a very slow metabolic rate, which gets in the way of weight loss.
These vitamin and mineral deficiencies can happen from following harsh, low-calorie, non-varied plans, or even from following a good weight-loss plan for too long without a break. Most people will not feel anything at first, but as time passes and the deficiency grows, the problems start to build up.
7 Steps to Avoid Vitamin and Mineral Deficiencies During Your Weight-Loss Journey
1. Eat a varied mix of vegetables and fruit
The more color on your plate, the more vitamins and minerals you are getting.
2. Eat enough protein
Like chicken, fish, meat, and legumes, to support recovery and muscle health, and because protein supplies iron, zinc, and B12 and helps with nutrient absorption.
3. Eat healthy fats
Like nuts, extra virgin olive oil, eggs, and avocado.
4. Keep your calorie deficit no more than 500 calories at most
300 calories is the better, more sustainable target.
5. Cut back on buying and stocking low-nutrient processed foods
They crowd out naturally nutrient-dense food in your diet, and you can easily reach for them over more useful options just because they taste good.
6. Pay attention to how your body responds to any plan you follow
Based on how you feel, your energy levels, your overall health, and your mood, you will know if your plan needs adjusting or if you are on the edge of a specific vitamin or mineral deficiency.
7. Schedule a "diet break" periodically
Every 2 to 3 months of sticking to a deficit, take a short break from it and raise your food intake to maintenance level for a short period, so your body can make up for any deficiency starting to form and reset your hormones before you continue the deficit.
FAQ
Does a vitamin D deficiency prevent weight loss?
It does not prevent it, but it makes it harder by increasing insulin resistance, disrupting your satiety hormone, and lowering your energy levels, which makes sticking to your plan harder.
How do I know if I have a vitamin deficiency while dieting?
The most common signs are constant fatigue, difficulty losing weight despite sticking to your plan, sluggishness and weaker workouts, and mood swings. The most accurate way to know is a full blood panel.
The Bottom Line
A vitamin and mineral deficiency is not just a minor detail, it is one of the hidden reasons that explains why your weight is stuck despite your effort. The fix is not stopping your plan, it is following a balanced, varied plan from the start.
That is exactly why we built Flexible Diet for Women: a plan that gets you real weight-loss results without depriving you of the dietary variety your body needs, far from the harsh restriction that puts you at risk of vitamin and mineral deficiencies.
Start Flexible Diet for Women →
This article is for educational purposes and does not replace seeing a doctor or dietitian, especially if you have clear signs of a deficiency.