Empty vegetarian capsules

The most common vegetarian capsules are made from HPMC (Hypromellose), which is derived from plant cellulose and offers low moisture content (4-8%), making it ideal for moisture-sensitive or hygroscopic powders. Pullulan capsules, made from fermented tapioca, provide a superior oxygen barrier and a more 'natural' label, though they are generally more expensive and sensitive to high-humidity environments.

Buyers must ensure suppliers hold FDA registration for the US market or EFSA compliance for Europe. Crucially, for vegetarian positioning, look for Vegan Society certification, Non-GMO Project Verified, and Halal/Kosher certifications to meet dietary and religious requirements. The manufacturing facility should strictly adhere to GMP (Good Manufacturing Practice) standards.

Capsule sizes range from 000 (largest, ~1.37ml) to 5 (smallest, ~0.13ml). The choice depends on the bulk density of your powder and the target dosage. For most dietary supplements, Size 0 and Size 00 are the industry standards. Always request a tapped density test of your ingredients to ensure the powder fits without over-compression, which can cause capsule brittle fracture.

To prevent downtime, specify capsules with high mechanical strength and consistent wall thickness. Look for 'ring-lock' or pre-lock designs that prevent premature opening during transport but allow for smooth separation on automatic filling lines. A low breakage rate (typically <0.01%) is a key KPI for premium suppliers.

The biggest risk is temperature and humidity fluctuations during transit. HPMC capsules can become brittle if too dry or sticky if too humid. Always insist on climate-controlled shipping (15-25°C and 35-65% RH) and use heavy-duty, moisture-proof corrugated packaging with internal antistatic liners.

Prioritize Audited Suppliers on Made-in-China.com who have undergone third-party inspections by SGS or TÜV Rheinland. Request a Certificate of Analysis (COA) for every batch and verify that the heavy metal limits (Lead, Arsenic, Cadmium, Mercury) meet your local pharmacopeia standards (USP or EP).

Focus on Total Cost of Ownership (TCO) rather than just unit price. Negotiate for free samples (5,000+ pieces) for machine trial runs. For long-term contracts, seek tiered pricing where the unit cost drops by 10-20% as annual volume exceeds 5 million pieces, and request fixed-price agreements for 12 months to hedge against raw material price spikes.

Use secure payment terms and consider third-party pre-shipment inspections to check for 'dimpled' capsules or color inconsistency. Ensure the Batch Number on the packaging matches the COA exactly. For first-time orders, use a Letter of Credit (L/C) or escrow-style payments to ensure the goods meet technical specs before final fund release.