Bulk Magnesium Citrate Anhydrous Powder Supplier in China
High-quality wholesale Magnesium Citrate Anhydrous for dietary supplements, food, pharma, and nutraceuticals.
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What is Magnesium Citrate Anhydrous?
Magnesium Citrate Anhydrous is the tribasic, water-free form of magnesium citrate, also called trimagnesium dicitrate or magnesium citrate tribasic, with CAS No. 3344-18-1, molecular formula C₁₂H₁₀Mg₃O₁₄, and a molecular weight of 451.11 g/mol. Appearing as a white crystalline powder, it is freely soluble in water and valued for its high bioavailability in dietary supplements and pharmaceutical formulations. Compared with Magnesium Citrate Dihydrate (CAS No. 813-94-5) and Magnesium Citrate Nonahydrate (CAS No. 144-23-0, the most common commercial form), the anhydrous grade is low in moisture, highly stable, and well-suited for capsules, tablets, and nutraceutical blends. Produced by neutralizing citric acid with magnesium, it meets USP specifications, with magnesium content typically 14.5–16.4% verified by HPLC and elemental assays. Widely available in powder form for mixing, capsules and tablets, liquid solutions, and effervescent tablets, it is typically packed in 25kg fiber drums for bulk supply. As the leading bulk Magnesium Citrate Anhydrous powder supplier in China, ProVita Biotech provides high-quality, third-party tested ingredients and supports OEM services for custom capsules, tablets, and full formulation solutions.
Magnesium Citrate Forms: Anhydrous VS Nonahydrate VS Dihydrate
Magnesium citrate exists in several hydration states, each with its own properties, uses, and market presence. The three key forms are:
Anhydrous Magnesium Citrate (CAS No. 3344-18-1)
- Description: Water-free, tribasic form.
- Features: Low moisture, high stability, concentrated magnesium content.
- Best For: Premium supplements, pharmaceutical-grade capsules, and tablets where potency and precise dosing matter.
Magnesium Citrate Dihydrate (CAS No. 813-94-5)
- Description: Contains two water molecules per formula unit.
- Features: Balanced stability and solubility, moderate moisture.
Best For: Specialized or mid-range supplement products.
Magnesium Citrate Nonahydrate (CAS No. 144-23-0)
- Description: Contains nine water molecules per formula unit.
- Features: Freely soluble, excellent flow properties, widely available.
- Best For: Mass-market supplements, beverages, and OTC preparations.
Among the different forms of magnesium citrate, Magnesium Citrate Nonahydrate (CAS No. 144-23-0) is the clear market leader, accounting for roughly 70–75% of commercial products due to its superior flow properties, stability, global supply chain reliability, formulation flexibility, excellent consumer tolerance, and long-established regulatory acceptance. In comparison, Magnesium Citrate Anhydrous (CAS No. 3344-18-1) holds about 20–25% market share, primarily in premium or high-potency supplements where maximum magnesium concentration and stability are required, despite higher costs and processing challenges. Magnesium Citrate Dihydrate (CAS No. 813-94-5) makes up only 5–10% of the market, used in specialized applications as a balanced option between solubility and potency but with more limited availability. Ultimately, the “best” form depends on application: anhydrous for maximum potency and pharmaceutical precision, dihydrate for balanced performance, and nonahydrate for commercial manufacturing, mass-market supplements, food fortification, and effervescent or liquid formulations.
magnesium glycinate vs citrate
Both magnesium glycinate and magnesium citrate are popular supplemental forms of magnesium, but they serve different purposes. Magnesium Glycinate (a chelated form) is known for its gentle effect on the stomach, excellent bioavailability, and calming benefits, making it a premium choice for sleep, stress, and long-term supplementation. Magnesium Citrate, on the other hand, is more widely available and affordable, with good bioavailability and mild laxative properties, making it a leading option for general supplementation and digestive support. In short: choose glycinate for potency, tolerance, and relaxation benefits; choose citrate for cost-effectiveness, wide use, and digestive health.
| Feature | Magnesium Glycinate | Magnesium Citrate (Anhydrous) |
|---|---|---|
| CAS Number | 14783-68-7 | 3344-18-1 |
| Other Names | Bisglycinate magnesium, Magnesium diglycinate | Trimagnesium dicitrate, Magnesium citrate tribasic |
| Molecular Formula | C₄H₈MgN₂O₄ | C₁₂H₁₀Mg₃O₁₄ |
| Molecular Weight | 172.42 g/mol | 451.11 g/mol |
| Appearance | White crystalline powder | White crystalline powder |
| Food Sources | Naturally derived from amino acid chelation (glycine); not abundant in whole foods | Found in citrus fruits (citric acid bound to magnesium) |
| Specifications | High purity chelated form, verified by HPLC; typical Mg content ~14% | USP/FCC grade, Mg content 14.5–16.4%, verified by HPLC and elemental assay |
| Purity | ≥ 99% (dietary supplement grade) | ≥ 98% (pharma/nutra grade) |
| Bioavailability | Very high, one of the best absorbed forms, well tolerated | High, especially in liquid solutions, but can cause mild laxative effect |
| Potency (Mg content) | Lower elemental Mg per gram (~14%) but highly efficient absorption | Similar Mg content (~14–16%) but slightly less efficient absorption |
| Dosage (Typical) | 200–400 mg/day (elemental Mg basis) | 250–400 mg/day (elemental Mg basis) |
| Half-life | ~20–24 hours (gradual release, chelated stability) | ~16–18 hours (faster release, more water-soluble) |
| Stability | Very stable due to amino acid chelation | Stable in powder form, more reactive in liquids |
| Popularity | Premium supplements; favored for sleep, mood, and stress support | Most common commercial form worldwide; widely used in OTC products |
| Pricing | Higher (premium ingredient, ~$20–30/kg in bulk) | Lower (widely available, ~$5–12/kg in bulk) |
| Main Benefits | Gentle on stomach, improves sleep, reduces stress, supports mood & nervous system | Affordable, supports digestion, relieves mild constipation, boosts magnesium intake |
| Best For | Long-term supplementation, sensitive stomachs, sleep/stress support | General supplementation, cost-effective formulations, digestive support |
Magnesium Citrate Anhydrous Certificate of Analysis(COA)
ProVita Biotech’s Magnesium Citrate Anhydrous powder (CAS No. 3344-18-1) is manufactured and tested under strict USP/EP standards to guarantee premium quality and safety for global supplement brands. According to the latest Certificate of Analysis (Batch No. 250720234, July 2025), the product delivers an assay of magnesium 15.6% (specification 14.5–16.4%), ensuring high purity and consistent potency. Heavy metals testing by ICP-MS confirms levels well below international limits: Arsenic <3.0 ppm, Lead <1.0 ppm, Mercury <0.1 ppm, Cadmium <1.0 ppm, Iron <100 ppm, and total heavy metals <50 ppm, all qualified. Chloride (<0.05%), sulfates (<0.2%), oxalates (<280 ppm), and loss on drying (0.02%) also meet specifications, with excellent solubility (3 g in 100 ml water within 3 minutes) and pH 8.39 for stable formulations. Particle size uniformity (≥99.0% through 60 mesh) and a bulk density of 0.65 g/ml make it suitable for capsules, tablets, and powder blends. Standard bulk packaging is 25kg fiber drums, secured for long shelf life and safe transport. With full compliance to GMP, Kosher, Halal, and third-party verified testing, ProVita Biotech demonstrates a strong commitment to quality and safety, ensuring that its Magnesium Citrate Anhydrous powder meets the highest international standards for supplement manufacturers, distributors, and global partners.
Application
Dietary Supplements
Magnesium Citrate is one of the most bioavailable forms of magnesium, making it highly effective for use in capsules, tablets, and powders. It supports energy production, bone health, and muscle function, and is a leading ingredient in global nutraceuticals.
Digestive Health Products
Widely used in OTC laxatives and gut health supplements, Magnesium Citrate helps promote healthy bowel movements and relieve occasional constipation. Its fast solubility and gentle action make it a trusted choice in digestive care.
Food & Beverage Fortification
Magnesium Citrate is commonly added to functional foods, sports drinks, and fortified beverages as a stable, water-soluble magnesium source. It enhances nutritional value while maintaining excellent taste and formulation compatibility.
Magnesium Citrate Anhydrous Manufacturing Process
At ProVita Biotech, the production of Magnesium Citrate Anhydrous powder follows a strict, step-by-step process to ensure consistent quality, purity, and compliance with international standards. The process begins with Magnesium Citrate Nonahydrate as the raw material, which undergoes picking, external bag dust removal, and feeding into the baking system. The material is then baked, cooled, and stored, transforming it into the stable anhydrous form.
Critical safety checkpoints such as vibrating screen screening (OPRP1) and magnetic separation remove any foreign bodies, while attached foreign particles are carefully collected to maintain product integrity. After appearance acceptance of the baked product, qualified batches proceed to warehousing, disinfecting, and bagging. Packaging involves quantitative filling, check weighing, tie strap sealing, and sewing (OPRP2) to guarantee intact packaging.
Products are then placed on trays, transported via forklift, stored in transit warehouses, and subjected to quality judgment, review, and final testing. Only batches meeting specifications – including an assay of magnesium content at 14.5-16.4% – are released for warehousing and export. Nonconforming products are immediately disposed of.
Throughout the process, every stage is controlled by USP/EP methods, third-party laboratory validation, and GMP-compliant practices. Finished Magnesium Citrate Anhydrous powder consistently meets international quality standards, is certified by GMP, Kosher, and Halal, and is delivered in secure 25kg fiber drums to global supplement manufacturers and distributors. This meticulous approach ensures high purity, safety, and reliability for capsules, tablets, and nutraceutical formulations.
Magnesium Citrate Anhydrous Benefits
- Highly bioavailable magnesium – efficient absorption to support overall health.
- Magnesium citrate for constipation – acts as a natural magnesium citrate laxative to gently relieve occasional constipation.
- Digestive support – promotes bowel regularity and is commonly used magnesium citrate for colonoscopy preparation.
- Magnesium citrate for sleep – supports relaxation, improves sleep quality, and reduces nighttime restlessness.
- Magnesium citrate calm – helps ease stress, promotes a calm mood, and supports nervous system balance.
- Energy metabolism – cofactor in ATP production, boosting daily vitality and endurance.
- Muscle and nerve health – reduces cramps, twitching, and neuromuscular fatigue.
- Bone and teeth health – improves calcium utilization, important for women’s bone strength and density (magnesium citrate benefits for women).
- Heart health – supports normal heart rhythm, blood pressure regulation, and electrolyte balance.
- Exercise recovery – replenishes electrolytes and reduces post-workout soreness.
- Kidney stone prevention – citrate binds urinary calcium to help maintain healthy mineral balance.
- Clean formulation – water soluble, neutral taste profile, ideal for capsules, tablets, powders, and drink mixes.
- Certified quality – USP/EP compliant with magnesium assay 14.5-16.4%, backed by GMP, Kosher, and Halal certifications.
Where to buy bulk Magnesium Citrate Anhydrous Powder?
If you are searching for a trusted magnesium citrate powder supplier, ProVita Biotech Co., Ltd. is your best choice. As the leading factory and supplier in China, we specialize in the supply of high-quality magnesium citrate ingredients backed by GMP, Kosher, Halal certificates and third-party testing. We offer competitive Magnesium Citrate price in bulk and provide flexible solutions for supplement brands, contract manufacturers, and distributors worldwide.
Our portfolio includes Magnesium Citrate Anhydrous powder, Magnesium Citrate Nonahydrate Granular 16%, and specialized forms such as calcium magnesium citrate and potassium magnesium citrate for different formulation needs. We also supply ready-to-formulate options including magnesium citrate tablets, magnesium citrate pills, magnesium citrate gummies, and magnesium citrate liquid preparations. Whether you are looking for bulk supplements magnesium citrate for capsules, powders, or beverage blends, we ensure consistent quality, purity, and global compliance.
With OEM services for capsules, tablets, gummies, and functional blends, along with free samples for evaluation, ProVita Biotech guarantees reliability, safety, and innovation in every batch. Partner with us for your bulk, wholesale Magnesium Citrate needs and gain direct access to a proven Magnesium Citrate supplier in China trusted by supplement manufacturers worldwide.
FAQs
Our Magnesium Citrate Anhydrous powder is produced through controlled dehydration of Magnesium Citrate Nonahydrate, followed by screening, magnetic separation, and packaging under strict GMP conditions. Each batch is tested for purity, assay (14.5-16.4% magnesium), heavy metals, and residual solvents using USP/EP methods and verified by third-party laboratories.
Our standard packaging is 25kg fiber drums with inner PE liner to ensure stability and long shelf life. Customized packaging options are available on request for OEM partners.
Yes, ProVita Biotech provides complete OEM services including formulation R&D, custom blending, capsules, tablets, powders, and gummies. We support private label supplement brands worldwide.
Magnesium citrate usually takes effect within 30 minutes to 6 hours, depending on dosage, hydration, and individual digestion. For supplement brands, it is often marketed as a fast-acting magnesium source for both laxative and nutritional applications.
We provide a full Certificate of Analysis (COA), MSDS, and third-party testing reports. All products comply with GMP, ISO, Kosher, and Halal certifications to meet international market requirements.
Magnesium citrate offers superior bioavailability compared to magnesium oxide, making it more effective for absorption in dietary supplements. Magnesium oxide is cheaper but less absorbed, while citrate is the preferred choice for premium capsules and tablets.
When used as a magnesium citrate laxative, bowel movements generally occur within 1-6 hours. This predictable onset makes it a reliable choice for OTC digestive health products.
The best time to take magnesium citrate for constipation is typically in the morning with plenty of water, ensuring effectiveness during the day. Supplement brands often recommend avoiding late-night intake to prevent sleep disruption.
Yes, magnesium citrate helps you sleep by supporting relaxation of the nervous system and regulating melatonin. Many formulations combine it with herbs or glycine for calm and sleep support supplements.
Magnesium citrate benefits for women include supporting bone density, reducing PMS-related cramps, improving sleep quality, and promoting calm mood balance. It is a key ingredient in women’s health supplements.
Milk of magnesia vs magnesium citrate differs mainly in form and use. Milk of magnesia (magnesium hydroxide) is primarily an antacid and laxative, while magnesium citrate is more soluble, better absorbed, and widely used in dietary supplements.
The best way to drink magnesium citrate for colonoscopy is as directed by a physician, usually diluted in water or juice and consumed in divided doses. Its high solubility makes it ideal for colon cleansing preparations.
Yes, magnesium citrate is a laxative widely used in pharmaceuticals and OTC digestive health. It works as an osmotic agent, drawing water into the intestines for effective relief of occasional constipation.
Magnesium glycinate vs citrate for weight loss shows that citrate is better for digestion and bowel regularity, while glycinate is better for stress reduction and sleep. For weight management, some supplement brands combine both for a balanced formula.
Magnesium citrate vs Miralax (polyethylene glycol) depends on application. Magnesium citrate is faster acting and provides added magnesium benefits, while Miralax is gentler and used for long-term constipation management.