As an innovative foreign trade service provider driven by both technology commercialization and foreign trade, HiSiaddi has built a service system of "1+2+3+4=1" and can supply original-source products of plant sterols and sterol esters from multiple well-known brands.
Equipped with R&D capabilities, HiSiaddi has collaborated with manufacturers on technology conversion and accurately captured market demands, repeatedly proposing formulation optimization solutions and application improvement recommendations for plant sterols and sterol esters. Below is a consultation case of formulation optimization for plant sterol and sterol ester products by HiSiaddi.
For inquiries about formulation optimization consultation services, please contact HiSiaddi customer service.
Client: VitaMed Srl, Italy A renowned high-end dietary supplement and functional food enterprise based in Italy, specializing in lipid regulation and vascular care soft capsules and compound nutritional powders, supplied to high-end pharmacies, private health institutions and organic supermarkets across Southern Europe including Italy, Spain and France. The enterprise complies with EU food standards, HACCP, cGMP and REACH regulations, positioning its products in the premium segment with stringent requirements for raw material-production line compatibility, finished product shelf stability and formulation compatibility, prioritizing quality over low procurement costs.
The client long purchased two raw materials — plant sterol ester oil and plant sterol powder — for mass production of its flagship lipid-lowering soft capsules and solid beverages. Post-production, multiple technical defects emerged that internal R&D and production teams failed to eliminate despite repeated adjustments to formulation parameters and equipment operating conditions, resulting in reduced finished product yield and increased end-consumer complaints. The client entrusted HiSiaddi to conduct technical diagnosis and deliver a complete implementable rectification solution.
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Soft Capsule Leakage and Shell Softening Plant sterol ester oil exhibited volatile fluidity during room-temperature filling; permeability intensified under high-temperature processing, causing seam leakage of capsules. Under low-temperature warehousing, partial oil stickiness softened and adhered gelatin capsule shells, disrupting normal sub-packaging operations.
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Caking and Color Aberration After Compound Powder Formulation After blending plant sterol powder with formula vitamins and dietary fiber, agglomeration and caking occurred within approximately one week of storage, accompanied by overall darkening of powder color, failing premium product appearance standards.
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Excessively Rapid Attenuation of Active Ingredients Over Shelf Life After 3 months of room-temperature storage, plant sterol active content in finished products declined by over 4%, and sterol ester oils developed slight rancid odors, failing the mandatory 24-month shelf-life requirement set by the client.
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Suboptimal Human Absorption Performance In vitro dissolution testing of finished products manufactured under the original formulation revealed low sterol dissolution rates, falling short of the client’s target absorption indicators.
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Collaborating with technical teams from domestic manufacturers, HiSiaddi pinpointed core root causes through raw material testing, formulation component analysis and simulation of the client’s production operating conditions:
1. Imbalanced Purity and Fatty Acid Matching in Sterol Ester Oil Elevated free sterol content in raw materials paired with unstable freezing point ranges of long-chain fatty acid esters caused oil penetration during heating filling and stickiness under low temperatures — the primary drivers of capsule leakage and shell adhesion.
2. Insufficient Surface Modification of Sterol Powder Base powder lacked hydrophobic anti-caking treatment, featuring large specific surface area and strong hygroscopicity. Contact with water-soluble auxiliary materials in the formulation triggered moisture absorption and caking; weak antioxidant capacity accelerated oxidation and discoloration upon exposure to air and trace mineral elements.
3. Singular Antioxidant System The client’s original formulation only incorporated a single antioxidant, unable to meet antioxidant demands for both sterol and sterol ester substances, leading to oxidative rancidity of oils and continuous loss of active ingredients.
4. Improper Raw Material Particle Size and Blending Logic Excessively large and unevenly distributed sterol powder particles caused inadequate mixing with other nutritional components, undermining powder stability and reducing dissolution and absorption efficiency in the human body.
Refining processes were adjusted to reduce free plant sterol content to below 1.5%; medium-short chain composite fatty acids replaced original esterification substrates to stabilize oil freezing point and viscosity, balancing filling fluidity and low-temperature physical state and completely resolving leakage and capsule adhesion issues. Oil peroxide value was strictly controlled ≤0.8 meq/kg, and trace impurities removed via filtration to avoid irritation to capsule shell materials.
Plant sterol powder underwent dry surface coating modification with food-grade inert coatings to boost hydrophobicity and anti-caking performance. Particle size distribution was optimized via classified crushing to narrow particle size differences. Post-modification powder featured drastically reduced hygroscopicity, remaining free of caking and discoloration after long-term compounding with all auxiliary materials.
A combined lipophilic + water-soluble composite antioxidant system was formulated tailored to the properties of sterols and sterol esters, acting separately on oil and powder phases. Guidance was provided to the client to adjust feeding sequences, with oxidation-prone raw materials blended in sealed environments. After rectification, accelerated testing over 6 months limited active ingredient attenuation within 1.8% with zero off-odor generation.
Based on revised raw material particle size parameters, HiSiaddi assisted the client in adjusting component ratios and adding dispersing aids to improve overall mixing uniformity. Production mixing speed and duration were revised with segmented blending processes to avoid excessive frictional heating of local materials, stabilizing component integrity while drastically elevating sterol in vitro dissolution rates to meet the client’s absorption targets.
Standardized operating documents were delivered to the client, specifying raw material storage temperature & humidity ranges, feeding environment requirements and equipment cleaning standards to prevent secondary defects via production management controls.
1. Complete Elimination of Production Malfunctions Soft capsule leakage and adhesion were fully resolved, with filling yield rising from an original 83% to 99%; compound powder remained free of caking and discoloration throughout storage with stable appearance quality.
2. Compliant Shelf-Life Quality Long-term finished product retention testing confirmed active ingredient content, flavor and appearance fully compliant with standards throughout the 24-month shelf-life with no oxidative deterioration.
3. Qualified Product Performance In vitro dissolution test results returned to the client’s design standards, delivering positive end-user feedback and complete elimination of consumer complaints.
After resolving all product defects, the client highly recognized HiSiaddi’s technical service capabilities, appointing HiSiaddi as its exclusive core supplier for plant sterol and sterol ester raw materials with consistent recurring orders. HiSiaddi was also entrusted to source additional raw material categories including plant extracts and functional oils.
For overseas high-end clients purchasing plant sterols and sterol esters, core conflicts rarely stem from basic raw material indicators, but rather incompatibility between raw materials and proprietary formulations, production lines and storage environments. Conventional trade services only deliver goods without technical diagnosis or process optimization support. Leveraging professional raw material expertise, formulation application experience and production process knowledge, HiSiaddi delivers full rectification spanning raw material, formulation and production stages to resolve application challenges in one-stop fashion, serving as a stable and technically capable supply chain partner for overseas mid-to-high-end clients.
For inquiries about formulation optimization consultation services, please contact HiSiaddi customer service.
+86-13120989737 
info@hisiaddi.com 
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