Low Molecular Weight Chondroitin Sulfate Sodium <5 kDa High-Bioavailability Joint & Skin Ingredient
Low molecular weight chondroitin sulfate sodium (LMWCS, CAS 9082-07-9) is produced by controlled enzymatic hydrolysis of standard chondroitin sulfate (bovine, porcine, avian, or shark source) using chondroitinase ABC or AC II enzymes, reducing the molecular weight from the native 20–60 kDa to less than 5 kDa and 5-15 kDa. This molecular weight reduction dramatically improves oral bioavailability — low MW chondroitin is absorbed intact across the intestinal mucosa via passive diffusion and peptide transporter pathways (PepT1), with absorption rates of 50–90% (vs. 5–15% for standard high-MW chondroitin, which is largely broken down by gut bacteria before absorption). Equally important, low MW chondroitin achieves genuine transdermal penetration — human skin permeation studies show that low MW chondroitin (4–8 kDa) achieves >90% skin permeation within 12 hours (vs. near-zero permeation for standard 20–50 kDa chondroitin), making it a truly bioactive topical ingredient for skincare. Despite the reduced chain length, low MW chondroitin retains the sulfated disaccharide structure and biological activity — stimulating proteoglycan synthesis, inhibiting MMPs and inflammatory cytokines, and providing cartilage and skin benefits — while delivering higher tissue concentrations due to improved absorption.
Our low molecular weight chondroitin sulfate sodium is manufactured to ≥90% purity with documented MW, available in nutraceutical, cosmetic, and research grades, and suitable for premium joint supplements (smaller capsules, higher efficacy), sublingual/chewable formats, and high-efficacy skincare serums/creams. As a leading bulk chondroitin sulfate sodium powder supplier, we provide full CoA documentation with molecular weight distribution, custom MW ranges (< 5 kDa, 5–10 kDa, oligosaccharide 1–6 kDa), and competitive pricing for premium supplement and skincare brands worldwide.
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Name | Low Molecular Weight Chondroitin Sulfate Sodium (LMWCS) |
| CAS Number | 9082-07-9 |
| Source Material | Bovine / shark / porcine / avian chondroitin sulfate (customer-specified) |
| Manufacturing Process | Controlled enzymatic hydrolysis (chondroitinase ABC / AC II) |
| Molecular Weight (GPC) | < 10,000 Da (documented per lot); custom ranges: 2,000–5,000 Da, 5,000–15,000 Da, oligosaccharide 1,000–6,000 Da |
| MW Distribution (PDI) | ≤ 1.5 (narrow distribution for premium grades) |
| Assay (CPC / HPLC) | ≥ 90% |
| Disaccharide Composition | ΔDi-0S, ΔDi-4S, ΔDi-6S (enzymatic cleavage products); total unsaturated disaccharides ≥ 85% |
| Sulfate Content | 20 – 30% (preserved from starting material) |
| Appearance | White to off-white fine powder |
| pH (1% solution) | 5.5 – 7.5 |
| Loss on Drying | ≤ 10% |
| Protein Content | ≤ 5.0% |
| Viscosity (1% solution, 25°C) | 1 – 5 mPa·s (significantly lower than standard CS) |
| Residual Enzyme Activity | None (heat-inactivated; verified by enzyme assay) |
| Heavy Metals | ≤ 10 ppm |
What Is Low Molecular Weight Chondroitin Sulfate Sodium?
Low molecular weight chondroitin sulfate sodium (LMWCS, also called high-bioavailability chondroitin, chondroitin sulfate oligosaccharide, or branded as Minipote®) is chondroitin sulfate that has been enzymatically or chemically depolymerized to reduce its molecular weight below 10,000 Da — typically to 2,000–10,000 Da, with ultra-low oligosaccharide grades at 1,000–6,000 Da.
Why molecular weight matters:
- Standard chondroitin sulfate (20–60 kDa): Large polysaccharide chains are poorly absorbed orally (5–15%, mostly broken down by gut bacteria to short-chain fatty acids) and cannot penetrate the skin (too large for transdermal diffusion).
- Low molecular weight chondroitin (<10 kDa): Shorter chains are absorbed intact across the intestinal mucosa (50–90% absorption) and genuinely penetrate the skin (>90% permeation in 12h), reaching viable dermal layers where they can exert biological effects.
The Specifications of Low Molecular Weight Chondroitin Sulfate Sodium
Item | Specifications | |
Molecular weight（MW） | <5kDa | 5-15kDa |
Assay | >90% | >90% |
Appearance | Light yellow to yellow | Off white to light yellow |
Enhanced Bioavailability & Transdermal Penetration — The Core Advantage
1. Oral Bioavailability
- Standard chondroitin (20–60 kDa): Only 5–15% is absorbed intact. The large polysaccharide chains cannot cross the intestinal epithelium via passive diffusion; a small fraction is absorbed via endocytosis or partially degraded by gut bacteria. Most is fermented in the colon to short-chain fatty acids (SCFAs), which may contribute to indirect benefits but do not deliver intact chondroitin to cartilage.
- Low MW chondroitin (<10 kDa): 50–90% is absorbed intact across the intestinal mucosa via:
- Passive diffusion (chains small enough to pass through tight junctions or transcellularly)
- PepT1 (peptide transporter 1) — the same transporter that absorbs di/tripeptides; low MW chondroitin oligosaccharides may be recognized as peptide-like substrates
- Endocytosis (more efficient for shorter chains)
- Clinical evidence: A human pharmacokinetic study using radiolabeled chondroitin showed that low MW chondroitin (4–8 kDa) achieved 3–5× higher plasma concentrations and 2–3× higher area-under-curve (AUC) compared to standard 30 kDa chondroitin. Peak plasma concentrations were achieved faster (1–2h vs. 3–4h).
- Practical benefit: Lower effective dosage (400–800 mg/day LMWCS vs. 800–1200 mg/day standard CS), smaller capsules/tablets, faster onset, and more consistent efficacy across individuals.
2. Transdermal Penetration (Skincare)
- Standard chondroitin (20–60 kDa): Essentially zero transdermal penetration. The molecular weight exceeds the ~500 Da threshold for passive skin diffusion; high-MW chondroitin remains on the skin surface, providing only temporary hydration (humectant effect) but no deep dermal biological activity.
- Low MW chondroitin (<10 kDa): Genuine transdermal penetration documented in human skin permeation studies (Franz diffusion cells):
- 4 kDa chondroitin: ~19% permeation at 2 hours, >90% permeation at 12 hours
- 8 kDa chondroitin: ~10% permeation at 2 hours, ~60–70% at 12 hours
- 16 kDa chondroitin: minimal permeation (<5% at 12h)
- Permeability coefficient increases with decreasing MW: 4 kDa (162 nm/s) > 8 kDa (125 nm/s) > 16.9 kDa (101 nm/s)
- Practical benefit: Low MW chondroitin is a truly bioactive topical ingredient — it reaches the viable epidermis and dermis, where it can stimulate fibroblast glycosaminoglycan/collagen synthesis, inhibit MMPs, reduce inflammation, and support wound healing — rather than just sitting on the surface as a humectant.
FAQ
- How is low MW chondroitin different from standard chondroitin? Standard CS is 20–60 kDa with 5–15% oral absorption and zero skin penetration. Low MW CS is <10 kDa with 50–90% oral absorption and >90% skin permeation in 12h. Same molecule, shorter chains, dramatically better delivery.
- Does lower MW mean less effective? No —Low Molecular Weight Chondroitin Sulfate Sodium retains biological activity (stimulates proteoglycan synthesis, inhibits MMPs) and delivers MORE active ingredient to target tissues due to better absorption. The optimal range is 4–10 kDa (balances absorption with receptor binding).
- Can it be used in skincare? Yes — this is the primary advantage. Low MW chondroitin genuinely penetrates the skin (>90% in 12h), reaching the dermis where it stimulates collagen/GAG synthesis. Standard chondroitin only sits on the surface.
- What dosage for joint health? 400–800 mg/day Low Molecular Weight Chondroitin Sulfate Sodium (vs. 800–1200 mg/day standard CS) due to higher bioavailability.
- Can vegetarians use it? Depends on source — bovine/shark/porcine are animal-derived. For vegan products, use plant-based algae chondroitin (which can also be low-MW).