Current RSPL commercial targets — reviewed 13 October 2026: protein above 15%, moisture below 10%, fibre below 12%, sand/silica below 3%. These are not a batch COA; request the report applicable to your consignment. Other ranges and quoted results in this dated article are educational or historical context, not additional current RSPL guarantees. See RSPL quality and buyer verification.
Deoiled Rice Bran (DORB) is a critical component of livestock feed, but recent reports of adulteration with dolomite, marble powder, and other minerals have raised alarms across the agricultural sector. These cheap additives jeopardize animal health, farm productivity, and even human safety. Here’s what farmers, feed manufacturers, and consumers need to know.
Why Are Minerals Like Dolomite Added to DORB?
Dolomite (a calcium-magnesium carbonate mineral) and similar substances like marble powder or limestone are increasingly used to adulterate DORB for two reasons:
Bulk Inflation: They add weight and volume to DORB, allowing suppliers to sell low-quality feed at higher profits.
False Mineral Enrichment: They artificially boost ash content, creating the illusion of nutritional value
While dolomite itself is sometimes used legitimately in cattle feed for its magnesium and calcium content, adulterated dolomite often contains toxic heavy metals like lead, arsenic, or mercury.
Health Risks for Animals
1. Toxic Heavy Metals
Contaminated dolomite introduces heavy metals into animal diets, causing organ damage, neurological issues, and even death.
Dairy cows: Heavy metals can accumulate in milk, posing risks to human consumers.
2. Mineral Imbalances
Excess calcium from marble powder or limestone disrupts phosphorus absorption, weakening bones and reducing milk production.
Poultry: Overconsumption of dolomite slows calcium absorption, leading to brittle eggshells and skeletal deformities.
3. Salt Toxicity
Adulteration with common salt can cause dehydration, kidney damage, and death in livestock.
4. Digestive Issues
Dolomite dust irritates the gastrointestinal tract, reducing feed intake and nutrient absorption.
Human Health Risks
Toxins in adulterated DORB enter the food chain through:
Milk: Heavy metals and contaminants accumulate in dairy products.
Meat/Eggs: Compromised animal health alters nutritional quality and safety.
For example, lead-contaminated milk can impair child development, while arsenic-laced eggs increase cancer risks.
How to Detect Mineral Adulteration
Ash Content Testing
Pure DORB has ≤10% ash. Higher levels suggest adulteration with dolomite or limestone.
Heavy Metal Screening
Labs use advanced methods (e.g., LC-MS/MS) to detect lead, arsenic, or mercury.
Physical Inspection
Gritty texture or unusual whiteness may indicate marble powder or limestone.
Economic Impact on Farmers
Mortality Losses: Cattle deaths from toxicity devastate small-scale farmers.
Reduced Productivity: Sick animals produce less milk/meat, cutting profits.
Testing Costs: Farmers bear the burden of quality checks to avoid adulterated feed.
The Solution: Vigilance and Trusted Suppliers
For Farmers
Demand lab reports for ash content and heavy metals.
Avoid unusually cheap DORB-adulteration is often tied to low pricing.
For Feed Mills
Partner with certified suppliers like Rudrapur Solvents Pvt Ltd, which guarantees:
Low ash (≤10%) and zero heavy metals.
Consistent quality with ≤3% sand/silica.
Why Choose Rudrapur Solvents?
Proven Track Record: Processed 70,000+ MT of DORB in recent years with ISO-certified quality control.
Transparency: Detailed specifications (protein above 15%, fiber below 12%) ensure nutritional value.
Farmer Trust: Rated 4.8/5 for consistency and reliability by clients across India.
Final Thoughts
"Quality feed isn’t an expense-it’s an investment in your farm’s future."
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