Magnesium stearate has been the go-to lubricant in tablet and capsule manufacturing for decades. It prevents ingredients from sticking to equipment, improves powder flow, and ensures consistent fill weights. But as clean label demand reshapes the supplement industry, formulators are increasingly scrutinizing this ubiquitous excipient — and finding a compelling organic alternative in Nu-MAG™ from RIBUS.
What Is Magnesium Stearate?
Magnesium stearate is a salt of stearic acid and magnesium, used as a lubricant and anti-adherent in tablet and capsule manufacturing at typical use levels of 0.25–1.5%. It reduces friction between powder particles and metal surfaces during compression or capsule filling. Despite its widespread use, it has several clean label limitations:
- It is a synthetic or semi-synthetic ingredient — typically not organic-certified
- It is most commonly derived from cottonseed or palm oil — both controversial sources
- Not Non-GMO Project Verified in most commercial forms
- Some research suggests it may affect tablet disintegration at higher use levels
- Consumers increasingly reject unfamiliar excipient names on supplement labels
What Is Nu-MAG™?
Nu-MAG™ is RIBUS’s plant-based, organic-certified lubricant for dietary supplement and nutraceutical manufacturing. Made from a proprietary blend of organic rice concentrate and rice bran, Nu-MAG™ provides lubrication and anti-adherent function equivalent to magnesium stearate — without any synthetic ingredients.
Nu-MAG™ is:
- USDA Certified Organic
- Non-GMO Project Verified
- Kosher and Halal certified
- Palm-free and cottonseed-free
- Derived from sustainable rice agriculture
Nu-MAG™ vs Magnesium Stearate: Side-by-Side Comparison
| Property | Magnesium Stearate | Nu-MAG™ |
|---|---|---|
| Source | Synthetic (cottonseed or palm-derived) | Organic rice concentrate and rice bran |
| USDA Organic | No | Yes |
| Non-GMO Verified | No (typical) | Yes |
| Clean Label | No | Yes |
| Function | Lubricant, anti-adherent | Lubricant, anti-adherent |
| Typical Use Level | 0.25–1.5% | 0.5–2% |
| Palm-Free | No (often palm-derived) | Yes |
| Kosher / Halal | Varies | Yes |
Performance: How Does Nu-MAG™ Compare?
Nu-MAG™ functions as a true lubricant in tablet compression and capsule filling operations. Because it is a plant-based blend rather than a pure fatty acid salt, formulators may use it at slightly higher levels (0.5–2% vs 0.25–1.5% for magnesium stearate), but this is well within standard excipient ranges and has no adverse impact on product performance.
Nu-MAG™ has been validated across a wide range of supplement formats including:
- Compressed tablets
- Hard-shell capsule fills
- Powder blends
- Stick packs and sachets
Unlike magnesium stearate, Nu-MAG™ does not carry the same concerns around hydrophobic film formation that can inhibit tablet disintegration at higher concentrations — a documented issue in pharmaceutical literature.
Why the Industry Is Moving Away from Magnesium Stearate
The shift is being driven by multiple forces converging at once:
- Retailer requirements — Natural channel retailers are increasingly mandating Non-GMO and clean label excipients
- Organic product growth — Magnesium stearate cannot be used in USDA Certified Organic formulations; Nu-MAG™ can
- Palm oil concerns — Environmental and sustainability issues with palm-derived ingredients are pushing brands toward alternatives
- Consumer label scrutiny — “Rice bran” reads far better on a label than “magnesium stearate” for today’s informed buyers
About RIBUS and Nu-MAG™
RIBUS, Inc. has been developing clean label, rice-based excipients since 1995. Nu-MAG™ is purpose-built for formulators who need a genuine lubricant that meets the highest clean label standards — organic, Non-GMO, and free of synthetic processing aids.
