What is NAD?
NAD stands for Nicotinamide Adenine Dinucleotide. It is a naturally occurring coenzyme involved in cellular energy production and metabolic processes throughout the body.
28 May, 2026 | Holy Winter - Healthcare Writer

If you ask many men when they first started noticing changes in their energy, recovery or overall wellbeing, the answer is often surprisingly similar.
“Probably sometime in my 40s.”
For some, it begins with feeling more tired than usual. For others, it’s slower recovery after exercise, reduced motivation, stubborn weight gain around the middle or simply feeling less physically resilient than they once did.
These changes can feel frustrating and sometimes confusing, particularly for men who still feel mentally young but notice their body responding differently to stress, sleep, movement and recovery.
And while many people immediately blame “getting older,” the reality is often more complex than that.
Men’s health, metabolism and energy levels are influenced by a combination of:
One area increasingly discussed within this conversation is NAD and its role in cellular energy production.
In our previous guide, What Is NAD and Why Does It Matter for Cellular Energy and Metabolic Health?, we explored how NAD supports the processes involved in cellular metabolism and mitochondrial function.
In this article, we’ll focus specifically on how these conversations relate to men’s health, ageing, energy, recovery and long-term wellbeing.
If you are interested in preventative men’s health support, metabolism or healthy ageing guidance, our iQ Doctor clinical team is here to help you explore evidence-based support at your own pace.
Many men reach a stage where they suddenly feel:
Often, these changes happen gradually.
You may notice:
For some men, this can also affect confidence and emotional wellbeing.
The important thing to understand is that metabolism is not simply about calorie burning. Metabolic health reflects how efficiently the body manages energy production, recovery and physiological balance overall.
And this process changes naturally over time.
Hormones play a major role in how men experience energy, recovery and metabolic wellbeing.
This includes hormones involved in things like muscle maintenance, the quality of sleep you have, how you deal with stress, appetite, body composition and how well you recover from an injury or any illness.
Testosterone is often the hormone people focus on most in men’s health conversations, but it is only one piece of a much wider picture.
Sleep deprivation, chronic stress, reduced activity levels and poor recovery habits can all influence how men physically feel day-to-day. This is one reason why burnout in men often feels deeply physical. You may feel utterly exhausted, experience low motivation, take longer to recover from an illness or generally feel mentally tired from lack of sleep. These experiences are increasingly common.
One of the biggest changes affecting men’s metabolism over time is gradual loss of muscle mass.
Muscle tissue plays an important role in metabolic efficiency. This is everything from your every day movement and energy to insulin sensitivity. As men become less active, work longer hours or recover more slowly, muscle mass can gradually decline if it is not consistently maintained.
This does not mean extreme training is necessary. In fact, some of the most supportive long-term habits you can adopt to keep this under control include:
Consistency matters more than intensity.
One of the most overlooked areas of men’s wellbeing is chronic stress.
Many men normalise things like day to day exhaustion, poor sleep, overworking under constant pressure and of course, emotional suppression without recognising the physical impact they can have on metabolism.
Persistently elevated stress hormones can influence sleep quality, your appetite and energy levels.
This is one reason why preventative health conversations are becoming increasingly important for men, particularly in their 40s and 50s.
As discussed in our earlier guide, NAD is a naturally occurring coenzyme involved in cellular energy production.
It helps support the processes cells use to convert nutrients into usable energy. Researchers are increasingly exploring how NAD relates to:
This does not mean NAD is a “cure” for ageing or low energy.
But it does explain why it has become part of broader conversations around healthy ageing and metabolic wellness. The key point is that metabolism happens at a cellular level, not just at the level of body weight or appearance.
Historically, many men delayed seeking help for health concerns. But that is beginning to change. More men are now actively engaging with conversations around metabolic health, mental wellbeing, hormones, weight management and health ageing.
Part of this shift is cultural.
Men are becoming more aware that wellbeing is not simply about reacting once something feels seriously wrong. It is also about supporting long-term resilience, confidence and quality of life much earlier.
This is one reason preventative healthcare and digital health support are growing so rapidly.
Many men feel pressure to pursue:
But long-term wellbeing rarely comes from extremes. The body generally responds better to:
Healthy ageing is usually about supporting the body rather than constantly fighting against it.
Sometimes the signs are subtle. You may notice you’re waking tired regularly, struggling to recover after exercise, growing larger around your abdomen or your energy simply crashes during the day. Overall, you may feel like you’re feeling physically older these days.
These experiences are common and often multifactorial.
Understanding metabolism and cellular health can help provide context without creating fear or unrealistic expectations.
NAD stands for Nicotinamide Adenine Dinucleotide. It is a naturally occurring coenzyme involved in cellular energy production and metabolic processes throughout the body.
Yes. Metabolism, recovery and energy production naturally change over time and can be influenced by hormones, stress, sleep, movement and lifestyle habits.
Lower energy can be influenced by many factors including sleep quality, chronic stress, reduced movement, hormonal changes, muscle loss and overall recovery capacity.
NAD is involved in cellular energy production and mitochondrial function. Research into NAD and healthy ageing is ongoing, but wellbeing is influenced by many lifestyle factors together.
Yes. Chronic stress can influence sleep, hormones, appetite, recovery and energy regulation, all of which affect metabolic wellbeing.
Yes. Muscle tissue plays an important role in metabolic efficiency, movement and energy use. Maintaining muscle through regular movement and strength-based activity can support long-term wellbeing.
No. Supplements should support healthy lifestyle habits, not replace foundational wellbeing practices such as sleep, movement, stress management and balanced nutrition.
Modern men’s health conversations are changing.
More men are recognising that energy, recovery and wellbeing are not simply about pushing harder or “fixing” themselves. They are about understanding how the body changes over time and supporting it more intelligently.
Metabolic health is shaped by:
NAD has become part of this wider conversation because it plays a role in cellular energy production and metabolic processes. But real wellbeing still comes from the bigger picture of sustainable lifestyle support and realistic expectations.
At iQ Doctor, we believe men’s health conversations should feel balanced, evidence-based and human, not driven by fear, shame or unrealistic promises.
“Men are becoming far more engaged in preventative health and metabolic wellbeing conversations, which is a really positive shift. Healthy ageing is not about chasing perfection or extremes. It’s about supporting energy, resilience and long-term wellbeing through sustainable lifestyle habits and evidence-led healthcare support.”
If you would like to explore broader men’s health support, metabolic wellbeing or preventative healthcare guidance, our UK-based clinical team is here when you’re ready.
Clinically reviewed by Omar El-Gohary, Superintendent Pharmacist
Date of review: 12 May 2026

CEO & Superintendent Pharmacist, iQ Doctor - Registration Number 2059792.
Omar is passionate about developing healthcare technology to empower our patients.