NRHM: The Next-Generation NR Salt That Solves Formulation Challenges

What Is NRHM?

NRHM (Nicotinamide Riboside Hydrogen Malate, CAS 2415659-01-5) is the malate salt form of Nicotinamide Riboside (NR). It is the newest commercially available NAD⁺ precursor, developed to address key limitations of NR chloride (NRC) — the incumbent form. PathGene holds a granted Chinese invention patent on the NRHM synthesis process.

Why Create a Malate Salt of NR?

NR chloride (NRC) has two well-documented formulation challenges:

• Hygroscopicity: NRC is extremely hygroscopic, absorbing moisture rapidly. This causes caking in powder forms, capsule fill weight inconsistency, and accelerated degradation if packaging is compromised.
• Chloride ion burden: At therapeutic doses, NRC contributes significant chloride load. For individuals on sodium-restricted or potassium chloride diets, this is a minor but non-trivial consideration for label transparency.

Malic acid is a natural organic acid present in many fruits and is involved in the Krebs cycle (as malate). Replacing chloride with malate provides:

• Reduced hygroscopicity — improved powder flow and capsule stability
• Malate as a metabolic co-factor — potentially synergistic with NAD⁺ synthesis pathway (malate→oxaloacetate in Krebs cycle)
• Cleaner label positioning as a "chloride-free" NR option
• Comparable bioavailability to NRC at equivalent molar NR doses

Molecular Comparison: NRC vs NRHM

Dosage and Formulation Notes

Because NRHM has a higher molecular weight than NRC (due to the malate counterion), formulators must adjust dose calculations:

• To deliver 250 mg NR equivalent: use approximately 380 mg NRHM vs 250 mg NRC.
• Standard NRHM serving in commercial supplements: 300–600 mg per capsule or softgel.
• NRHM is compatible with capsule, tablet, powder sachet, and stick pack formats.
• Combine with pterostilbene (10–50 mg) for SIRT1/SIRT3 activator stacking — increasingly popular in premium formulations.
• Avoid co-formulation with strong oxidants. Stable with B-vitamins, resveratrol, and NMN.

Stability Advantage

In head-to-head accelerated stability testing (40°C/75% RH, 3 months), NRHM shows approximately 15–20% lower moisture uptake compared to NRC, translating to better powder flowability and more consistent capsule fill weights. Real-time stability data (2–8°C, sealed) shows ≥97% purity retained at 24 months.

Regulatory and IP Status

NRHM is covered by PathGene's granted Chinese invention patent. We license NRHM supply globally. As a salt form of NR (an established dietary supplement ingredient), NRHM does not require a new NDI (New Dietary Ingredient) notification in the US if the NR moiety itself is already established in the market. For EU Novel Food filings, the malate salt is assessed as a novel modification of an existing notification — we can provide supporting documentation.

PathGene NRHM Supply

PathGene is currently one of the primary commercial NRHM manufacturers globally, with 50 MT/year capacity and ISO 17025-verified COAs. Request NRHM samples or bulk pricing.