Why You’re Still Tired: Nutrient Deficiencies and the Hidden Causes of Fatigue

Fatigue isn’t always about sleep, stress, or aging. Often, it’s a quiet signal that the body lacks the raw materials it needs to produce energy efficiently. You can eat plenty of calories and still feel depleted if key nutrients are missing or poorly absorbed. Energy, after all, is not just about food intake—it’s about how well your cells can turn that food into usable energy.

At the cellular level, energy is produced inside mitochondria (the energy-producing factories inside of each cell), which rely on a steady supply of vitamins, minerals, amino acids (proteins), and essential fats to function properly. When even one piece is missing, energy production slows. The body compensates by conserving fuel, and you feel it as fatigue, brain fog, weakness, or that “wired but tired” sensation so many people describe.

Some of the most common energy-draining deficiencies include iron, B vitamins, magnesium, zinc, and protein. The problem is, people try to micro-manage those systems by taking synthetic vitamins that really do nothing to heal the condition, but only mask it.  Deficiencies don’t always show up clearly on basic lab work, especially when absorption may be the real problem.

Diet plays a major role, but it’s not just about what you eat—it’s about what you absorb. Chronic digestive stress, low stomach enzymes, gut inflammation, long-term low-calorie diets, and even high stress can impair nutrient uptake. Someone may be eating “clean” and still be running on empty. This is why fatigue so often overlaps with bloating, reflux, loose stools, constipation, or food sensitivities.

So, what actually helps?

First, nutrition. Focus on nutrient-dense, whole foods that supply minerals and cofactors in their natural balance: quality meats and proteins, properly prepared cooked and raw vegetables, healthy fats, and mineral-rich broths or greens. Simplifying meals and avoiding ultra-processed foods often improves absorption.

Second, acupuncture. From a physiological standpoint, acupuncture improves blood flow, supports digestive and autonomic nervous system regulation, and helps shift the body out of chronic stress mode. When digestion and circulation improve, nutrient delivery to tissues improves—and energy often follows without forcing or stimulation.

Third, something you can do at home: eat in a calm state. Sit down. Chew thoroughly (to a liquid before swallowing). Avoid screens while eating. This simple shift activates the parasympathetic nervous system, which directly improves digestion and nutrient assimilation. Energy begins in the gut long before it reaches the muscles or brain.

If fatigue has lingered despite “doing all the right things,” it’s often because multiple systems need support at the same time. That’s where comprehensive care matters. When nutrition, digestion, nervous system regulation, and circulation are addressed together, energy doesn’t need to be chased—it returns naturally.

Want to hear more from Dr. Carling? Check out our podcast. Search for VitalHealth4You on your favorite podcast listening app or go to vitalhealthcda.com/podcasts/

©2025 Holly A. Carling, O.M.D., L.Ac., Ph.D.

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Dr. Holly Carling

Dr. Holly Carling is a Doctor of Oriental Medicine, Licensed Acupuncturist, Doctor of Naturopathy, Clinical Nutritionist and Master Herbologist with nearly four decades of experience. Dr. Carling is a “Health Detective,” she looks beyond your symptom picture and investigates WHY you are experiencing your symptoms in the first place. Dr. Carling considers herself a “professional student” – she has attended more than 600 post-secondary education courses related to health and healing. Dr. Carling gives lectures here in the U.S. and internationally and has been noted as the “Doctor’s Doctor”. When other healthcare practitioners hit a roadblock when treating their patients nutritionally, Dr. Carling is who they call. Dr. Carling is currently accepting new patients and offers natural health care services and whole food nutritional supplements in her Coeur d’ Alene clinic.

Medical/Health Disclaimer:

The information provided in this article or podcast should not be construed as personal medical advice or instruction. No action should be taken based solely on the contents of this article or podcast. Readers/listeners should consult appropriate health professionals on any matter relating to their health and well-being. The information and opinions provided here are believed to be accurate and sound, based on the best judgment available to the author, but readers/listeners who fail to consult appropriate health authorities assume the risk of any injuries.

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