How to Store NMN Properly (And Why Most Companies Get It Wrong)

NMN is one of the most promising longevity supplements available today, but it's also one of the most unstable. Store it incorrectly, and you're essentially swallowing expensive placebo powder. Here's what you need to know about keeping your NMN effective.

Why NMN Storage Matters

NMN (Nicotinamide Mononucleotide) degrades rapidly when exposed to heat, moisture, and light. Studies show that NMN can lose significant potency within weeks under poor storage conditions. The molecule breaks down into nicotinamide through hydrolysis, which doesn't provide the same NAD+-boosting benefits you're paying for.

In practical terms: if your NMN has been sitting in a hot warehouse, transported in an unrefrigerated lorry during summer, or exposed to humidity, there's a good chance it's already compromised before it even reaches you.

The Proper Way to Store NMN

The golden rule: Keep it cool and dry.

Whilst some manufacturers claim their NMN is room temperature stable for up to two years, proper storage is still critical:

Store in a cool environment, ideally below 25°C. Avoid hot environments at all costs. Room temperature in a cool, dry cupboard is generally sufficient for stable, pharmaceutical-grade NMN.

Humidity is the real enemy. This is where most people go wrong. Moisture causes NMN to clump and hydrolyse (break down), degrading into nicotinamide. Keep containers tightly sealed and store in a dry location away from kitchens and bathrooms.

Store in opaque containers away from direct sunlight. UV exposure breaks down the molecular structure.

Once opened, keep containers tightly sealed between uses. Use within 3 to 6 months for optimal potency.

The Refrigeration Debate: What You Need to Know

There's considerable debate about refrigerating NMN. Here's the truth: refrigeration isn't necessary for high-quality, stable NMN—and it can actually create problems.

The issue with refrigeration is condensation. Every time you remove NMN from the fridge, temperature changes can cause moisture to form inside the container. This is precisely what you're trying to avoid. If your NMN clumps, some of it has already degraded.

That said, if you do choose to refrigerate for peace of mind, never store NMN in the freezer (temperature fluctuations are even more extreme), and consider using a decanting method: portion your NMN into smaller containers so you're not constantly exposing your entire supply to temperature changes.

Our recommendation is a cool, dry cupboard away from direct sunlight. No refrigeration needed.

Where the Industry Gets It Wrong

Most NMN suppliers and resellers overlook a critical weak point: the supply chain before it reaches your cupboard.

Unmonitored warehouses mean many companies store supplements in standard facilities with no climate control. During summer months, temperatures can exceed 30°C or higher, devastating for NMN stability, regardless of what happens after you receive it.

High humidity storage in standard warehouses often means poor humidity control. Even sealed containers can be affected over time, particularly during storage and dispatch.

Third party logistics means resellers often use general fulfilment centres that handle everything from books to batteries. These facilities aren't designed for temperature sensitive compounds and certainly don't monitor humidity.

Transit exposure means even if stored properly at the warehouse, NMN can sit in hot delivery vans or humid distribution centres for days during dispatch.

Inadequate packaging means many suppliers use standard packaging without considering environmental protection, leaving products vulnerable during the last mile of delivery.

The result? You might be buying degraded NMN that's already lost much of its effectiveness before you take your first dose. Then you store it perfectly at home, wondering why it's not working.

How Longevity Formulas Does It Differently

At Longevity Formulas, we've built our entire operation around one principle: protecting product integrity from manufacturing to your doorstep.

Temperature monitored storage means our NMN, NMN Complex, and all longevity supplements are stored in a dedicated, climate controlled environment with continuous monitoring. We track temperature round the clock to ensure optimal conditions year round.

Controlled dispatch environment means products remain in our climate stable facility right up until the moment they're dispatched to you. No third party warehouses, no unmonitored storage periods, no sitting in humid or hot environments.

Pharmaceutical grade NMN means we source only high quality, stable NMN. But even the highest grade NMN is worthless if it's been degraded by poor storage before it reaches you.

Protective packaging means we carefully consider packaging choices to provide additional protection during transit, particularly during warmer or more humid months. Whether you choose our powder or capsule format, both are protected equally.

Fresh stock rotation means we maintain optimal stock levels to ensure you receive fresh product, not NMN that's been sitting for months.

It's about respecting the investment you're making in your longevity and ensuring that what arrives at your door is as effective as what left the manufacturer. Once it reaches you, simple storage in a cool, dry cupboard is all that's needed.

What This Means for You

When you're comparing NMN suppliers, price isn't everything. A cheaper product that's been degraded by poor storage is far more expensive than properly stored NMN at a fair price, because one works and one doesn't.

Ask potential suppliers:

• Where and how is your NMN stored before dispatch?
• Is temperature monitored?
• How long does stock sit in warehouses?
• What happens during hot or humid weather?
• Do you use third-party fulfilment centres?

If they can't answer these questions confidently, that's your answer.

Bottom Line

NMN is a powerful tool for supporting healthy ageing and NAD+ levels, but only if it reaches you intact. The debate about refrigeration misses the point: the real damage often happens before the product ever arrives at your home.

Proper storage isn't a luxury; it's a fundamental requirement for any company serious about selling effective longevity supplements. You shouldn't need to refrigerate pharmaceutical grade NMN if it's been stored properly from the start. A cool, dry cupboard is perfectly adequate, but only if your supplier has done their job correctly before dispatch.

At Longevity Formulas, we've invested in temperature and humidity monitored storage specifically so you can trust that the NMN you receive is as potent as it should be. Because there's no point in taking longevity supplements if they've already lost their longevity benefits before reaching you.