Men's Health

Low Energy in Men: Beyond Testosterone

August 6, 2026 · 7 min read

When men experience persistent fatigue, the conversation almost always turns to testosterone. While testosterone certainly plays a role in energy and vitality, it is far from the only factor, and often not even the primary one. Thyroid dysfunction, adrenal stress, mitochondrial inefficiency, nutrient deficiencies, and poor sleep architecture all contribute to the low-energy picture that brings men into clinical practice. A naturopathic approach investigates all of these systems to find the actual drivers behind the exhaustion.

The Testosterone Tunnel Vision Problem

Testosterone replacement has become one of the most marketed solutions for male fatigue, and while it can be appropriate in specific clinical situations, it is often prescribed without adequate investigation into why testosterone is low in the first place. Chronic stress, insulin resistance, sleep deprivation, obesity, and environmental toxin exposure all suppress testosterone production. Replacing the hormone without addressing these root causes creates a dependency that does not resolve the underlying problem.

Many men with fatigue complaints actually have testosterone levels within the normal range. Their exhaustion stems from other physiological disruptions that are being overlooked. Even when testosterone is genuinely low, it is frequently a downstream consequence of another system under strain, not the origin of the problem. A comprehensive assessment prevents the common mistake of treating the lab value rather than the person. I find that when I explain this to patients, it is often the first time it has been framed this way for them, and that reframe alone can shift how they approach their recovery.

Thyroid Function and Male Energy

Thyroid disorders are significantly underdiagnosed in men because they are culturally associated with women. According to data from the American Thyroid Association, thyroid disease affects up to 12 percent of the population, yet the majority of cases remain undetected. Subclinical hypothyroidism (where TSH is elevated but technically within range, and free T3 and T4 are suboptimal) is a common contributor to fatigue, brain fog, weight gain, and cold intolerance in men. Standard screening that checks only TSH misses many of these cases.

A thorough thyroid assessment includes TSH, free T3, free T4, reverse T3, and thyroid antibodies. This panel reveals whether the thyroid gland is underperforming, whether conversion from T4 to the active T3 is impaired, and whether autoimmune thyroiditis is developing. Addressing thyroid health through selenium, zinc, iodine optimization, and stress reduction can restore energy levels that testosterone therapy alone never would.

The relationship between thyroid and adrenal function is particularly important. When cortisol is chronically elevated, the body increases production of reverse T3, which blocks thyroid hormone receptors and effectively creates a hypothyroid state even when thyroid lab values appear normal. This is why thyroid and adrenal systems must be evaluated together, and why this pattern is so easy to miss when only standard panels are run. After years working with patients on Salt Spring Island, this is one of the most common and most rewarding things I get to uncover: a man who has been told everything is normal, but whose thyroid and adrenal picture tells a completely different story.

Adrenal and Cortisol Patterns

The adrenal stress response is designed to be acute: a burst of cortisol and adrenaline to handle a short-term threat, followed by recovery. Modern life, with its relentless demands and insufficient rest, keeps the stress response chronically activated. Over time, this leads to cortisol dysregulation: levels that are too high at night, too low in the morning, or flattened throughout the day. Each pattern produces its own version of fatigue.

Men with high evening cortisol often report feeling wired but tired, unable to wind down despite being exhausted. Those with a blunted morning cortisol response struggle to get out of bed and may not feel alert until late morning or early afternoon. These patterns are identifiable through salivary cortisol testing and respond well to targeted interventions including adaptogens, phosphatidylserine, and circadian rhythm optimization.

DHEA-S, the adrenal hormone that counterbalances cortisol, is often checked alongside cortisol and provides important context. Low DHEA-S in the presence of dysregulated cortisol reflects a more advanced stage of adrenal stress that may require different treatment than cortisol dysregulation alone. Supplementing DHEA without this context risks hormonal side effects, which is why testing before treating is essential. Appropriate DHEA support in the right patient can produce meaningful improvements in energy, libido, and sense of well-being that cortisol-focused interventions alone do not address.

Mitochondrial Health and Nutrient Deficiencies

As outlined in a comprehensive review in the journal Mitochondrion, every cell in the body depends on mitochondria to produce ATP, the fundamental energy currency. When mitochondrial function is compromised (through oxidative stress, nutrient depletion, toxic exposure, or chronic inflammation), energy production declines at the cellular level. This manifests as the kind of deep, pervasive fatigue that sleep alone does not fix.

Key nutrients for mitochondrial function include CoQ10, magnesium, B vitamins (particularly B1, B2, B3, and B5), alpha-lipoic acid, and carnitine. Deficiencies in iron, vitamin D, and zinc are also common contributors to male fatigue and are easily identified through comprehensive bloodwork. Many men who eat what they consider a healthy diet are still deficient in one or more of these critical nutrients due to soil depletion, food processing, and increased metabolic demand from stress.

Organic acids testing provides a functional window into mitochondrial efficiency, revealing whether the citric acid cycle and electron transport chain are operating optimally. This level of assessment goes far beyond standard bloodwork and often uncovers the hidden bottlenecks in energy production that explain why a man feels exhausted despite adequate sleep and exercise.

Building a Comprehensive Energy Recovery Plan

Restoring energy in men requires a systematic approach that addresses all contributing factors simultaneously. The foundation begins with sleep optimization, not just duration but quality, including adequate deep sleep and REM phases. Sleep apnea screening is essential, as the American Academy of Sleep Medicine estimates that approximately 80 percent of moderate to severe obstructive sleep apnea cases remain undiagnosed, and the condition is particularly common in men and profoundly undermines energy, cognitive function, and hormonal health.

Nutritional interventions focus on blood sugar stability, anti-inflammatory eating patterns, and targeted supplementation based on identified deficiencies. Movement should be calibrated to current capacity, as overtraining in a depleted state worsens fatigue rather than resolving it. Stress management practices, toxin reduction, and gut health optimization round out the plan.

Recovery timelines vary depending on how long the body has been in a depleted state and how many systems are involved. Most men begin noticing meaningful improvements within four to eight weeks of consistent intervention, with continued gains over three to six months as deeper biochemical restoration takes hold.

Key Takeaways

Low testosterone is frequently a downstream effect of other imbalances, not the primary cause of fatigue.
Subclinical thyroid dysfunction is underdiagnosed in men and requires a full thyroid panel to detect.
Cortisol dysregulation creates distinct fatigue patterns (wired-and-tired vs. flat) that respond to targeted adrenal support.
Mitochondrial health depends on CoQ10, B vitamins, magnesium, and other nutrients that are commonly depleted.
Sleep apnea affects up to 80 percent of cases undiagnosed and is a major and reversible driver of male fatigue.
A comprehensive assessment, rather than a testosterone focus, identifies the actual combination of drivers at play.

Dr. Rigobert Kefferputz, ND

Naturopathic doctor on Salt Spring Island with over 14 years of clinical experience in integrative medicine. McGill University and Boucher Institute of Naturopathic Medicine graduate. Member of the Canadian Association of Naturopathic Doctors.

References & Further Reading

This article is for education and is not a substitute for individual medical advice. For background reading, these independent health authorities offer evidence-based information: