Guide to Check for High-Quality, Pure NMN Capsules (And Avoiding Fillers)

Guide to Spotting High-Quality, Pure NMN Capsules (And Avoiding Fillers)

For over nine years, I've been deeply involved in the NMN space, witnessing trends come and go and suppliers rise and fall. One constant challenge for consumers has been identifying genuinely pure NMN powder, especially in capsules where fillers and shortcuts can hide. As the longest-running NMN supplier in the UK, we've learned a thing or two about what true purity looks and tastes like. Here's your essential guide to becoming an expert spotter of premium NMN capsules.

The "Under the Tongue" Instant Dissolve Test: Your #1 Purity Check

This is the single most effective at-home test you can perform. True, pharmaceutical-grade NMN (like the powder we use in Charge Products capsules) has very specific solubility characteristics.

1. Carefully open a capsule and pour a small amount of the powder under your tongue (the sublingual area).

2. Observe the reaction. Pure NMN should dissolve almost instantly upon contact with saliva. We're talking seconds, not minutes.

3. Note the taste. You should experience a clean, slightly zesty or tart aftertaste (a characteristic of the niacinamide moiety). There should be no bitterness, no chalkiness, and no chemical "burn."

The Red Flag: If the powder sits under your tongue, forms a clump, and takes 1-2 minutes or more to dissolve, this is a strong indicator of the presence of fillers like magnesium stearate, silica, or microcrystalline cellulose. These are often used to bulk out powder, reduce cost, or aid manufacturing, but they impede the rapid absorption that pure NMN is known for.

The Capsule Checklist: Size and Weight Matter

The capsule itself is a tell-tale sign of what's inside.

• Capsule Size: High-quality, high-dose NMN capsules should typically use a Size 0 capsule. This is the standard for a ~500mg dose of pure NMN powder.

• The Size 00 Red Flag: Be wary of NMN capsules in Size 00. This larger capsule is often used to accommodate lower purity powder mixed with fillers to reach a perceived "high dose" volume. A Size 00 capsule filled with pure NMN would contain an impractically large (and expensive) dose.

• The Scale Test (The Proof): If you really want to be sure, place an entire sealed capsule on a precise milligram scale.

  • A Size 0 capsule containing ~500mg of pure NMN will have a total weight of approximately 530mg (the powder + the capsule shell).

  • A Size 00 capsule, due to its larger shell and potential fillers, will often weigh nearer to 800mg or more. This extra weight isn't more NMN; it's more capsule and more filler.

Why Third-Party Testing and Provenance Are Non-Negotiable

Physical tests are great, but they come after purchase. Your first line of defence is choosing a supplier whose purity claims are backed by science.

• Always Look for 3rd Party Lab Tests (COAs): Any reputable supplier must provide accessible, recent Certificates of Analysis from independent laboratories. These verify the actual NMN content (often 99%+ for the purest forms), screen for heavy metals, and confirm the absence of microbial contaminants.

• The Importance of a Trusted Source: After nine years of importing and supplying NMN in the UK, we've seen the market evolve. Consistency, reliability, and transparency are what separate a lasting brand from a flash-in-the-pan vendor. Charge Products has built its reputation on this foundation—offering recognised pure NMN that is consistently third-party verified.

Choosing with Confidence in 2025

In today's market, especially on platforms like eBay, it's vital to look beyond clever marketing. Sales rankings can be a useful indicator of trust and customer satisfaction. As of 2025, Charge Products NMN consistently ranks as a top-performing and best-selling NMN supplement on eBay UK, a testament to the thousands of customers who have validated our product's quality and results.

In Summary: Your Pure NMN Quick-Guide

• Dissolves Instantly under the tongue with a clean, zesty taste.

• No Bitterness, no delay.

• Capsule Size 0, not 00.

• Total Weight ~530mg on a scale.

• Supplier provides 3rd Party Lab Reports.

• Choose a proven, long-running supplier with a transparent history. With nine years as the UK's longest-running NMN importer, Charge Products is committed to delivering the purity your health investment deserves.

Invest in your longevity wisely. Your body can tell the difference.

The Charge Products Team