Fatigue and Cravings? How to Tell if You Have a Nutrient Deficiency

On the JJ Barnes Blog, stop blaming your lack of willpower for constant cravings and fatigue, and learn how to tell if you have a nutrient deficiency that is actually sabotaging your habits.

We often fall into the trap of labeling ourselves based on our struggles. Whether it is a constant sugar craving, a lack of focus, or difficulty maintaining a routine, most people tend to blame their personality, lack of willpower, or inherent character flaws. However, it is important to consider that the root cause of these frustrations may be biological rather than behavioral. Research suggests that a significant majority of our energy levels and emotional well-being are directly dictated by our nutritional intake.

A recent analysis by Ben’s Natural Health sheds light on this disconnect. By cross-referencing extensive health data with clinical symptom patterns, it becomes clear that many so-called “bad habits” are actually physical signals—manifestations of nutritional imbalances that our bodies are desperately trying to correct.

Is Your Sweet Tooth Actually a Magnesium Deficiency?

If you find yourself constantly reaching for chocolate, cakes, or sugary snacks, it may not be a lack of self-control. Up to 75% of adults suffer from a magnesium deficiency, and this mineral is essential for stabilizing blood sugar. When levels are low, blood sugar levels can dip, prompting the brain to search for an immediate, high-energy fix—which usually results in an intense sugar craving.

What to do: Instead of reaching for processed sweets, try snacking on magnesium-rich pumpkin seeds or almonds. If you opt for supplementation, look for magnesium glycinate or magnesium citrate, as these forms typically offer the highest rates of absorption, with a common daily range of 200–400 mg.

Procrastination and the Iron Connection

Labeling yourself as “lazy” or a “procrastinator” can be deeply demoralizing, but these behaviors are frequently linked to iron deficiency, which impacts nearly one-third of the adult population. Iron is the vehicle that delivers oxygen to the brain; when that supply is insufficient, the result is often brain fog, chronic fatigue, and a noticeable loss of motivation.

What to do: If you suspect this is the case, request a ferritin test from your doctor. Standard blood tests often only measure hemoglobin, which may miss the early signs of depleted iron stores. In the meantime, focus your diet on iron-rich sources like red meat, lentils, and spinach, or check out iron supplements to target the problem directly.

Misinterpreted Moods and Vitamin D

Feelings of burnout, persistent sleepiness, or a low mood are often dismissed as situational stress or depression. However, these symptoms are classic indicators of low vitamin D, an issue affecting over 40% of the population. Vitamin D plays a crucial role in regulating sleep cycles, motivation, and overall mood.

What to do: Boost your intake through foods like fatty fish, egg yolks, and fortified milk. If you choose to use Vitamin D supplements, many experts suggest 4,000–5,000 IU of D3 daily. To ensure proper absorption, always take your vitamin D alongside a source of fat, such as an Omega-3 supplement.

Compulsive Habits and Zinc Levels

Compulsive behaviors, such as skin picking or nail biting, are often misunderstood as purely psychological habits. In many cases, these actions are triggered by low zinc levels. When the body lacks zinc, nails and skin can become brittle, dry, and prone to cracking. This creates a physical discomfort that leads to picking, which unfortunately exacerbates the issue and fuels a cycle of compulsive behavior.

What to do: Consider supplementing with 25–50 mg of elemental zinc supplement daily. Additionally, prioritize zinc-heavy foods in your diet, such as oysters, red meat, and chickpeas.

The Bottom Line

Many people spend years attempting to “fix” themselves through productivity apps, rigid routines, or willpower-based lifestyle changes, only to find themselves back at square one. Often, the frustration stems from treating a biological requirement as a character deficit.

If you have been struggling to break a specific habit for months without success, it is time to stop looking for a new routine and start looking at your nutrient levels. Checking your bloodwork may reveal that the “flaw” you have been trying to overcome is simply a missing piece of your nutritional puzzle.