Remember when you could pull an all-nighter and bounce back like nothing happened? Now, an 8pm movie on the couch feels ambitious. You are not alone — and it is not just "getting older." Researchers are looking at a molecule called NAD+ as one possible piece of the puzzle.
From my conversations with busy professionals across Singapore and Southeast Asia, fatigue is the number one complaint I hear. Not the "did not sleep well" kind, but the deep, stubborn tiredness that follows you everywhere. One client, a 42-year-old finance executive, told me: "I used to have endless energy. Now I am drained by 3pm no matter what I do." After learning about NAD+, we focused on everyday habits that support cellular energy pathways. Within weeks, she felt she noticed a difference, though one person's experience is not proof of anything. Here is what is happening inside your cells.
NAD+ (nicotinamide adenine dinucleotide) is a coenzyme found in every living cell. Think of it as a tiny helper involved in two critical things: energy production and cellular repair.
Some researchers suspect that when NAD+ levels fall, things like tiredness and slower recovery could follow, but this has not been firmly shown in people.
Your body makes NAD+ from precursors like niacin, tryptophan, and nicotinamide riboside (NR). Studies, mostly in animals and in muscle tissue, suggest that several things change as you age:
Many researchers think NAD+ falls in several tissues as we age, but evidence in humans is limited and not always consistent. How much any decline contributes to fatigue, metabolic slowdown, or reduced cellular resilience is still being studied.
Possibly. You cannot stop ageing, but lifestyle habits and, for some people, supplements may influence NAD+ levels. How much this matters for how you feel is not yet clear.
Lab and animal research links fasting and calorie restriction with higher NAD+ and more sirtuin activity. Human evidence is thinner. Many of my readers in Singapore find that simply skipping late-night snacks and having an earlier dinner makes a noticeable difference.
Studies suggest regular exercise, including resistance training, can raise NAD+ in muscle tissue, including in middle-aged adults. You do not need a gym membership. A short routine at home with bodyweight exercises is a simple way to get moving.
When cells repair DNA damage, such as damage from UV radiation, repair enzymes use up NAD+. Alcohol is also hard on the body in general, though research on its effect on NAD+ specifically is limited. Cutting back on both is sensible for your overall health.
NAD+ itself is generally not what supplements deliver. Instead, you take precursors — smaller molecules your body can convert into NAD+. The two most studied are NMN (nicotinamide mononucleotide) and NR (nicotinamide riboside). Both are available as supplements. Quality matters — look for third-party tested products from reputable brands.
Animal studies suggest that raising NAD+ may improve mitochondrial function and physical performance in older animals. Human studies are still emerging. Trials show that NR and NMN can raise NAD+ measures in middle-aged and older adults. Results on muscle function and fatigue are mixed, with some small studies suggesting a modest benefit and others finding none. Reviews describe the clinical benefits seen so far as limited.
Is NAD+ a miracle cure? No. Research here is still limited, and it is too early to say that supporting NAD+ levels improves energy or healthy ageing in people.
NAD+ precursors like NMN and NR have generally been well tolerated by healthy adults in short-term human studies. However, long-term human studies are still limited. Always talk to your doctor before starting any new supplement, especially if you are on medication, pregnant, breastfeeding, or have a medical condition.
That afternoon slump you have been blaming on your coffee wearing off? NAD+ may play a part, but many other things can too. The good news is you are not powerless. Small, consistent changes — better sleep, regular movement, and careful choices about supplements — can support how you feel every day.
Start with one thing this week. Maybe it is an earlier dinner. Maybe it is a 15-minute walk. Then see how you feel. Your cells will thank you.
Ask Elaine how this applies to your goals and routine — free, no pressure.