Psyllium Husk Purity and Swelling Volume Guide
A technical guide for food and nutraceutical buyers on evaluating Psyllium Husk grades (85% to 99.95% purity) and swelling volume index (35 ml/g to 55+ ml/g).
Psyllium Husk (Plantago ovata) is the premier natural plant-based dietary fiber.
Commercial export grades from India are classified primarily by Purity Percentage (85% to 99.95%) and Swelling Volume Index (35 ml/g to 55+ ml/g). Food manufacturers specify 85%–95% purity for bakery and cereals, while pharmaceutical and nutraceutical buyers require 98%–99.95% purity with high swelling volume. Sourcing from Lokavia guarantees USP/EP monograph compliance, low heavy metal content, and batch-tested mucilage potency.
What Is Psyllium Husk & Why Does Purity Matter?
Psyllium husk is the clean, dried epidermis removed from the seeds of Plantago ovata, grown primarily in Gujarat and Rajasthan (supplying >85% of world volume). The husk yields over 80% soluble fiber, forming a viscous mucilaginous gel in aqueous systems.
Purity measures the ratio of pure white translucent husk relative to heavy dark seed coat fragments and extraneous matter.
1. Psyllium Husk Purity Grades Breakdown
| Purity Grade | Translucent Husk % | Dark Seed / Light Flakes % | Swelling Volume (ml/g) | Primary Applications |
|---|---|---|---|---|
| 85% Purity | 85.0% Min | 15.0% Max | 35 – 40 ml/g | Feed grade, horse psyllium, industrial fiber |
| 95% Purity | 95.0% Min | 5.0% Max | 40 – 45 ml/g | Food grade, gluten-free baking, breakfast cereals |
| 98% Purity | 98.0% Min | 2.0% Max | 45 – 50 ml/g | Standard nutraceutical grade, OTC fiber supplements |
| 99% Purity | 99.0% Min | 1.0% Max | 50 – 55 ml/g | Premium pharma grade, encapsulated fiber powders |
| 99.95% Super White | 99.95% Min | 0.05% Max | 55+ ml/g | High-end clinical formulations, instant drink mixes |
2. Swelling Volume Testing (USP Monograph)
Swelling volume measures the milliliters occupied by 1 gram of psyllium husk after expanding in water:
- Weighing: Accurately weigh 1.00 g of sample.
- Hydration: Add to a 100 ml graduated cylinder with 90 ml of distilled water.
- Agitation: Shake vigorously every 10 minutes for 1 hour; allow to stand undisturbed for 24 hours.
- Reading: Read the volume occupied by the swollen mucilage layer. Minimum standard is 40 ml/g for food grade and 50–55+ ml/g for USP pharmaceutical grade.
3. Psyllium Mesh Classifications
- Whole Psyllium Husk: Intact flaky texture for raw dietary drinks and animal feed.
- Psyllium Powder 40 Mesh: Coarse ground powder for chewable tablets and baking dough.
- Psyllium Powder 70 Mesh: Standard ground powder for caplets and food fortification.
- Psyllium Powder 100 Mesh (Ultra Fine): Instant-dispersible fine powder for smooth RTD beverages.
Frequently Asked Questions (FAQ)
What is the primary difference between 95% and 99% purity psyllium?
95% purity contains up to 5% light seed fragments and achieves 40–45 ml/g swelling volume (ideal for commercial baking), while 99% purity contains ≤1% extraneous matter and achieves 50–55 ml/g swelling volume for pharmaceutical use.Why is swelling volume important in gluten-free baking?
Higher swelling volumes yield stronger hydrocolloid gel networks that trap carbon dioxide bubbles, replicating the crumb structure and elasticity of gluten in breads and pizza doughs.Does steam sterilization lower the swelling volume?
When executed with precision high-temperature short-time (HT-ST) parameters, steam sterilization reduces microbiological counts while preserving 100% of the natural swelling index without chemical residues.What packaging is used for bulk psyllium export?
Psyllium husk is packed in 25 kg poly-lined multi-wall kraft paper bags or 500 kg jumbo sacks loaded on heat-treated ISPM-15 wooden pallets.Source Quality Psyllium Husk from Lokavia
Lokavia exports food-grade and USP-grade Psyllium Husk and Psyllium Powder directly from Gujarat and Rajasthan.
Request a Sample or Quotation or view detailed technical specifications on our Psyllium Husk page.