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Calcium L-Threonate (6).jpg
Calcium L-Threonate (7).jpg

Calcium L-Threonate

  • Product Name Calcium L-Threonate
  • CAS No 70753-61-6
  • MF C₈H₁₄CaO₁₀
  • MW 310.27
  • Specification 99%
  • Test Method HPLC
  • Certificates HACCP, FSSC22000, Kosher, Halal, FDA, SGS
  • Shelf Time 2 years
  • Package 25kg/Drum
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product details

Introduction

Calcium L-Threonate is a highly bioavailable form of calcium, with the chemical formula C₈H₁₄CaO₁₀ and CAS No. 70753-61-6. It is a calcium salt of L-threonic acid, a metabolite of Vitamin C (ascorbic acid) in the human body. This form of calcium is recognized for its superior absorption and retention compared to conventional calcium supplements, making it an ideal choice for bone health formulations.

Unlike many inorganic calcium sources (e.g., calcium carbonate, calcium phosphate), Calcium L-Threonate offers gentle gastrointestinal tolerance and does not require gastric acid for dissolution. It is readily soluble in water, has a neutral taste, and is suitable for both solid and liquid formulations.

Commercial production typically involves fermentation or synthesis of L-threonic acid from Vitamin C, followed by neutralization with calcium salts under controlled conditions, and subsequent purification and crystallization. The result is a white to off-white crystalline powder with excellent stability under normal storage conditions.

Calcium L-Threonate has gained popularity in nutraceutical markets globally for bone density support, joint health, and as part of comprehensive calcium–collagen–vitamin D formulas. Its clean-label, non-GMO, and often vegan-suitable profile makes it appealing for premium dietary supplement brands.

Calcium L-Threonate (2)

Typical Specifications

Item

Specification

Assay (Calcium L-Threonate, HPLC)

≥98.0%

Calcium Content

12.5–13.5%

Appearance

White to off-white crystalline powder

Identification

HPLC/IR spectrum consistent with reference

Loss on Drying

≤1.0%

pH (1% solution)

5.0–7.0

Heavy Metals

≤10 ppm

Microbiology

TPC ≤1,000 cfu/g; Yeast & Mold ≤100 cfu/g; E. coli/Salmonella: Negative

Solubility

Freely soluble in water

Packaging

25 kg fiber drum or customized packaging

Storage

Store in a cool, dry place; protect from light and moisture

Benefits

✓ High bioavailability — enhances calcium absorption and retention in bones

✓ Supports bone density and overall skeletal health

✓ Gentle on digestion — suitable for individuals sensitive to other calcium forms

Calcium L-Threonate (1)

Application

Nutraceuticals: Capsules, tablets, chewables, and powder blends for bone and joint health

Functional Beverages:Calcium-enriched drinks and liquid supplements

Fortified Foods: Added to dairy alternatives, nutrition bars, and meal replacements

Calcium L-Threonate (3)

Product Processing

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Standard and Certificates 

All of our products are made in a GMP-compliant facility where every step of production is carefully managed. Over the years, our factory has passed several well-recognized audits, including HACCP, ISO22000 and ISO9001. The products also meet Kosher and Halal requirements, and we hold FDA registration as well. These certifications reflect the standards we follow rather than just labels we collect—they’re part of how we ensure consistency and safety in every batch. 


Free Sample Available 

If you’d like to get a feel for the product before placing an order, we can send you a free sample. In most cases, we provide around 10–20 grams so you can evaluate the quality yourself. For items with higher raw material costs, we will confirm the exact amount we can offer so everything is clear before shipping. 


Standard Packaging and Private Label 

For regular shipments, we usually pack goods in 1–5 kg aluminum foil bags, 10–20 kg cartons, or 10–30 kg fiber drums, depending on the item and order size. 
If you’re planning to sell under your own brand, we also handle private labeling. We can help design and produce packaging with your logo or artwork so the products arrive ready for retail. Many customers find this saves them a lot of time compared with printing and repacking on their end. 

Shipping Method 

Orders under one metric ton are generally shipped through major express couriers such as DHL, FedEx, UPS or EMS. For larger quantities, we can arrange transport by sea or railway. The best method depends on your location and how quickly you need the goods, so we’ll help you choose the most practical option. 


After Sale Services 

Most of our products remain stable for up to two years, and we guarantee their quality within that period. If anything arrives below your expectations, our return process is straightforward. You can send back the portion in question, and we will refund the corresponding amount—no complicated procedures or hidden conditions. 

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