You've done the research. You understand what NAD+ is, that it declines with age, and why so many people are turning to supplementation to support their energy, focus, and recovery. But you checked, and there are many options in the market, so you wonder which format actually works, and which one fits your life.
The options can feel overwhelming. NAD+ here, NR and NMN there, all claiming to be the best. But the truth is that each one has its benefits, and the “best” is what suits you the most.
In this article, we will help you understand and choose wisely by explaining:
-
How each NAD+ supplement format works and what the science says about absorption
-
The real costs, trade-offs, and compliance challenges
-
Why NEU+ developed the world's first NAD+ drink, and what makes the liquid format worth trying for many
(And if you are unsure about what NAD+ supplements are, read our article on NAD, NAD+, NAD supplements, and the science behind them)
TL;DR
-
Capsules (with NAD+ precursors like NR and NMN) can effectively boost NAD+ levels in the blood, but absorption depends on gut metabolism, varies across individuals, and requires consistent daily use to see results.
-
IV infusions deliver NAD+ directly into the bloodstream at 100% bioavailability, but cost around £400 per session, require clinic visits lasting 2–4 hours, and come with side effects like nausea and flushing.
-
NEU+ is the world's first NAD+ drink on the market. It is a ready-to-drink liquid format designed for faster absorption, consistent daily dosing, and a routine you can actually maintain, without needles or pills.
How NAD+ gets into your cells depends on how you take it
Not all NAD+ supplements are equal, and the first thing is: always read the label. Understanding what each product has is the first step to comprehending how they work. Here’s what you need to know about how you go from supplement to NAD+ and energy.
What happens when you swallow a capsule
Most capsules on the market do not contain NAD+ directly. Instead, they use precursors. These are molecules like NMN (Nicotinamide Mononucleotide) or NR (Nicotinamide Riboside), which the body then converts into NAD+ through its own biosynthesis pathways.
When you swallow a capsule, it passes through the digestive tract, where stomach acid and intestinal enzymes begin breaking it down. A significant portion of NMN and NR undergoes degradation in the gut lumen before reaching the bloodstream, with most of both compounds converted into simpler molecules (primarily nicotinamide, or NAM) by gut bacteria before absorption. After this microbial conversion, these metabolites are absorbed and used by the body to synthesise NAD+ through alternative pathways, a process that is slower and less direct than it sounds on the label.
That said, capsules do work. A 2026 randomised contcrolled study in Nature found that 14 days of oral NR or NMN supplementation increased whole-blood NAD+ concentrations by approximately 2-fold compared to placebo. NAD+ levels rise, but the question is how efficiently, how consistently, and whether they fit into a daily routine you can actually stick to.
NAD+ does not absorb well orally
Some products market direct oral NAD+ rather than precursors. This sounds intuitively good: if NAD+ is what you need, take NAD+. But NAD+ is a large, charged molecule that does not cross cell membranes intact and is unstable in supplement form, degrading quickly with heat, moisture, and the acidic environment of the stomach. Limited human studies exist on direct oral NAD+ supplementation, and the clinical evidence supporting its efficacy is weaker than that for precursor-based approaches.
Liquid formats and liposomal delivery have emerged as potential solutions. Liposomal encapsulation wraps NAD+ or precursors in fat-based bubbles that protect the molecule through digestion, with early studies suggesting improved bioavailability. The direction of innovation is clear: format and delivery matter as much as dose.
Injections and IVs work best for your body, but not for your wallet or schedule
Intravenous (IV) NAD+ infusions bypass the digestive system entirely, delivering NAD+ directly into the bloodstream at 100% systemic bioavailability. This makes IV therapy the best for high-dose NAD+ delivery, and the results can be quick.
But the trade-offs are significant. A single NAD+ IV infusion session typically costs £400 or more. Treatment is not a one-off: the standard protocol involves a loading phase of 4–10 sessions in the first weeks, followed by monthly maintenance, bringing annual costs to £6,000–£15,000 or more. Sessions last 2–4 hours and require a clinic visit, which rules out most working professionals and anyone with a busy schedule.
The side effects also deserve honest mention. Nausea, flushing, headaches, chest tightness, and injection-site reactions are commonly reported, particularly when the infusion is administered quickly. These are usually mild and temporary, but they add friction to a protocol that is already demanding.
Intramuscular NAD+ injections offer a faster and somewhat cheaper alternative, but they also require clinical oversight, carry similar side-effect profiles, and still involve needles.
Factors beyond the molecules
The best NAD+ supplement is the one you take, with a dose that matches your needs. NAD+ levels decline gradually with age, and the evidence tells us that sustained supplementation works better than occasional high-dose interventions.
Capsules: Timing and absorption
Capsules are convenient in theory but fragile in practice. If you already take other medications, another capsule disappears into the habit noise. And when you travel, store supplements inconsistently, or simply forget, the benefit of any oral supplement becomes low. This is called unintentional non‑adherence, a well‑described phenomenon in the supplementation and medical world.
There are serious absorption variability concerns as well. Factors like gut health, timing of administration (with or without food), and the composition of your microbiome all affect how much NMN or NR reaches your tissues as a usable NAD+ precursor. The same dose can produce meaningfully different results across individuals.
Managing multiple pills with a tight schedule shows why many people are looking for a simpler NAD+ supplement routine than capsules alone.
Injections: Cost and time
IV therapy delivers results, but at a cost structure that excludes most people. Spending 3 hours in a clinic every month, hundreds or thousands of pounds, is simply not realistic for most athletes with training schedules, executives managing demanding workdays, or parents running households.
The high barrier to consistent use is precisely what the science on NAD+ decline suggests is the wrong approach. Cellular health is a daily practice, not a one-time reset.
The first NAD+ drink: designed for absorption and the life you actually live
NEU+ was built to solve both problems that stop most people from maintaining a supplementation routine: the absorption limitations and routine issues of capsules and the access barriers of injections.
The liquid format matters scientifically. Liquid delivery bypasses many of the mechanical barriers that slow capsule absorption: there is no hard capsule shell to dissolve, no delay before gastric processing begins, and a liquid medium supports faster entry into the digestive mucosa. For NAD+ precursors, this means a more consistent absorption window and less variability across individual gut environments.
As the world's first NAD+ drink supplement, NEU+ also solves the routine problem directly. A 60 mL shot takes 30 seconds. It requires no water, no clinic, no needle, and no medical supervision. It fits into a morning routine the same way coffee does, and unlike a capsule you might forget, it is a drink you look forward to, as they come with flavours.
The cost comparison matters too. A single IV infusion session costs more than months of daily NEU+ supplementation, without the commitment to a clinical schedule. It has a similar cost as capsules, and our shots include Vitamin C and Trimethylglycine, which support your cells against oxidation and DNA damage as well. For anyone who wants meaningful, sustained NAD+ support, a daily liquid shot is the more rational option considering value, evidence, and format.
If you want to understand why NAD+ matters for your energy and recovery in the first place, check out this article on the benefits of NAD+ supplements.
A practical comparison: capsules, injections, and the NEU+ NAD+ drink
| Capsules | IV infusions | NEU+ NAD+ drink | |
|---|---|---|---|
| What you're taking | Precursors (NR, NMN) | Direct NAD+ | Precursors (NR) |
| Bioavailability | Variable; gut-dependent | ~100% systemic | Enhanced, still gut-dependent |
| Cost per month | ~£40–£100 | £400+ per session | £100 |
| Time required | 30 seconds | 2–4 hours per session | 30 seconds |
| Side effects | Generally well-tolerated | Nausea, flushing, headache | Generally well-tolerated |
| Clinic required | No | Yes | No |
| Consistency | Easy to forget | Hard to maintain | Routine-friendly |
| Pioneer status | Widely available | Clinic-dependent | World's first NAD+ drink |
Independent testing: NEU+ is Informed Sport certified
When comparing supplements, format and absorption aren't the only factors. Purity and safety matter just as much. The supplement industry can be difficult to navigate, with many products not accurately reflecting what is on their label.
This is why independent third-party testing is crucial. NEU+ goes beyond standard quality checks and is officially Informed Sport certified. This rigorous, globally recognised certification means every single batch is tested for banned substances and impurities before it reaches your hands.
Whether you are a professional athlete subject to strict anti-doping regulations or simply someone who wants total peace of mind about what goes into your body, this level of independent verification guarantees you are getting a safe, pure, and trusted product.
NAD+ supplementation works when you actually do it
The research is clear: raising NAD+ levels through consistent supplementation supports energy production, recovery, and cellular health as we age. The format question seems trivial, but it is what makes you stick to the daily ritual instead of forgetting the pill before rushing to work.
The world's first NAD+ drink was designed by NEU+ to fill the gap in between: evidence-based, liquid-format supplementation you can build into your morning without friction.
If you want to see what’s in the shot, our flavours, and buy them, head to our shop.
Frequently asked questions
1. What is the best NAD+ supplement format?
NEU+ NAD+ drink offers the best blend of bioavailability, price, and convenience. However, your needs can vary depending on your goals and lifestyle. Capsules using NR or NMN precursors are the most researched oral option and do raise NAD+ levels, but absorption varies by individual. IV infusions deliver the highest bioavailability but require clinic visits and a high cost. For most people seeking consistent, daily NAD+ support, a ready-to-drink liquid format like NEU+ offers the best balance of science, convenience, and long-term compliance.
2. Does oral NAD+ supplementation actually work?
Yes. Peer-reviewed clinical trials, including a 2026 study published in Nature, found that oral NR and NMN supplementation approximately doubled whole-blood NAD+ levels after two weeks compared to placebo. The catch is that gut metabolism plays a key role, and results can vary. Liquid formats and liposomal delivery are designed to reduce that variability.
3. Why do NAD+ capsules use NMN or NR instead of NAD+ directly?
NAD+ itself is a large, unstable molecule that degrades easily in the gut and cannot cross cell membranes intact. NMN and NR are smaller precursor molecules that the body converts into NAD+ internally, and they have a stronger track record in clinical research for effectively raising intracellular NAD+ levels.
4. Are NAD+ injections worth the cost?
For people seeking intensive, yes. Supervised NAD+ therapy through an IV offers unmatched bioavailability. But for daily wellness, recovery, and healthy aging, the cost and time commitment make injections impractical as a long-term routine. Most people will see meaningful, sustained results with a well-formulated daily supplement at a fraction of the cost.
5. What makes a liquid NAD+ supplement better than a capsule?
An NAD+ drink supplement improves absorption by removing the mechanical delay of capsule dissolution, supports faster entry into the digestive mucosa, and reduces the routine friction that causes most people to stop supplementing. NEU+, the first NAD+ drink on the market, combines these absorption benefits with a 30-second daily ritual that fits into any schedule.