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Frequently Asked Questions

Jump to Section: General | Capabilities & Equipment | Formulation & Ingredients | Minimums & Lead Times | Quality & Compliance | Specialty Capsules | Packaging & Logistics | Sustainability & Ethics | Regulatory | Project Support | Capsule FAQs | Additional FAQs

General Contract Capsule Manufacturing

What is contract capsule manufacturing?

Contract capsule manufacturing is a turnkey partnership where a cGMP‑certified facility like Highland Laboratories formulates, encapsulates, tests, packages, and ships finished hard‑shell capsules under your brand name.

How is Highland Laboratories different from other capsule manufacturers?

We pair 50 years of nutraceutical experience with an on‑site laboratory, high‑speed encapsulators, and FDA registration —giving you faster decision‑making, transparent data access, and “Made in USA” credibility.

Are you FDA‑registered and NSF‑cGMP certified?

Yes. Our FDA establishment registration number and UL certificate are provided in every Quality Agreement and available for on‑site audits.

What product formats do you handle besides capsules?

Tablets, powders, liquids, creams, lotions—ideal when your brand roadmap spans multiple dosage forms.

Do you offer private‑label stock capsules?

Yes—over 80 evidence‑backed, market‑tested stock formulas with MOQs starting at very low quantities. 

Capabilities & Equipment

What capsule sizes can you make?

All industry sizes — 5, 4, 3, 2, 1, 0, 00, 000 — including elongated 00 EL for extra fill weight.

What is the maximum fill weight per capsule?

This varies depending on material density, but usually up to ~1,100 mg in size 000, depending on bulk density and flow characteristics.

Which shell materials are available?

Bovine or fish gelatin, plant‑based HPMC, and certified‑organic pullulan.

Can you make delayed‑release or enteric capsules?

Absolutely—HPMC DR‑Caps® and post‑fill enteric coating protect sensitive actives through gastric transit.

Can capsules be color‑matched or branded?

Yes—Pantone® color matching, two-color axial or radial printing, and laser etching are available (minimums vary by color).

Formulation & Ingredients

Will you help develop a custom formula?

Our experienced formulation team optimizes particle size, flow, hygroscopicity, and excipient ratios to hit label claims and machine fill weights.

Can you encapsulate oils or beadlets?

Yes—beadlet‑in‑oil and liquid‑in‑hard‑shell technologies are ideal for fish oil–plus–vitamin D or other oil‑soluble actives.

Do you source ingredients globally?

We work with 350+ audited suppliers on five continents and provide full country‑of‑origin traceability.

How do you verify ingredient quality?

Identity, potency, microbiological, and heavy‑metal testing in our state of the art lab, plus optional third‑party confirmation.

Can you accommodate allergen‑free or vegan formulas?

Yes—dedicated allergen‑control protocols and vegan HPMC shells keep cross‑contact below detectable limits.

Minimums, Lead Times, & Pricing

What is the minimum order quantity for custom capsules?

Industry‑standard is **100,000 – 300,000 pieces** (≈ 1,500 – 5,000 bottles at 60‑ct).

What is the MOQ for private‑label stock capsules?

As low as **6 bottles** per SKU.

What is your typical lead time?

Custom formulas:  6  –  8 weeks after raw‑material approval. Stock formulas: 2 – 4 weeks.
Raw Material Approval: This can take 6 - 8 weeks to procure and test raw materials. 

What factors drive capsule pricing?

Active‑ingredient cost per kg, capsule size and shell type, testing scope, packaging components, and run size.

Do you offer pilot or R&D batches?

Yes—50,000‑cap pilot runs are available to validate flow and capsule performance before full‑scale production.

Quality & Compliance

Which certifications do you hold?

UL‑cGMP, USDA Organic Certified, Non‑GMO Project, Gluten‑Free, plus optional Kosher and Halal certification.

How do you ensure cGMP compliance?

A Quality Management System aligned to 21 CFR 111 & 117, daily deviation reviews, and quarterly internal audits.

Are your facilities third‑party audited?

Yes—annual FDA, UL, and customer audits; full reports are available under NDA.

What documents come with each lot?

Certificate of Analysis, finished‑product specs, MSDS, allergen and gluten statements, flow diagram, and packaging reconciliation.

Can you host FDA or customer audits?

Absolutely—dedicated audit room, document portal, and pre‑audit gap assessments are included.

Specialty Capsule Types

What are HPMC capsules?

They’re plant‑based shells made from hydroxypropyl methylcellulose—non‑GMO, vegan, and more humidity‑tolerant than gelatin.

When is HPMC better than gelatin?

For vegan markets, hygroscopic ingredients, or supply chains > 65 % RH; HPMC tolerates wider humidity and temperature ranges than gelatin.

Do you manufacture acid‑resistant probiotic capsules?

Yes—HPMC DR or enteric‑coated shells validated for < 1 % breakage in simulated gastric fluid.

Can you produce capsule‑in‑capsule formats?

No— we currently do not have this capability for dual‑phase delivery systems separate incompatible actives or stage nutrient release.

Do you offer certified‑organic capsules?

Organic pullulan shells and organic excipient systems allow USDA NOP‑compliant SKUs.

Packaging & Logistics

What packaging formats do you supply?

HDPE/PET bottles, glass, and eco‑ready pouches.

Can you deliver Amazon‑ready packaging?

Yes—FBA & SIOC compliance, scannable barcodes, carton labels, and help navigating certification charge‑backs.

Do you offer blister packaging?

No. 

Can you handle fulfilment and drop‑shipping?

Integrated pick‑and‑pack with real‑time inventory API lets you ship DTC, B2B, or marketplace orders without leaving our campus.

How are capsules stored and shipped?

Climate‑controlled warehousing at 20 – 25 °C and ≤ 60 % RH. Gelatin capsules stored below 77 °F; HPMC tolerates up to 86 °F.

Sustainability & Ethics

What sustainability practices do you follow?

FSC‑certified cartons, recyclable PET, carbon‑neutral energy offsets, and supplier vetting against modern‑slavery indices.

Are your gelatin sources grass‑fed?

On request, we specify grass‑fed, hormone‑free bovine gelatin with full traceability.

Are HPMC capsules truly vegan?

Yes—verified free of animal derivatives and eligible for Kosher & Halal certification.

Do you offer biodegradable packaging?

PLA bio‑resin bottles and compostable pouches are available at higher MOQs.

How do you minimize waste?

Closed‑loop capture of dust fines, solvent‑free cleaning, and a campus‑wide recycling rate > 90 %.

Regulatory & Documentation

Which U.S. regulations govern dietary‑supplement capsules?

21 CFR 111 (cGMP), 101 (labelling), 117 (food safety), plus FTC advertising guidelines.

Can you help with Supplement Facts panels?

Yes—our regulatory team drafts FDA‑compliant labels and Amazon/DSHEA disclaimers.

Do you perform stability studies?

ICH accelerated (40 °C/75 % RH) and real‑time (25 °C/60 % RH) studies with quarterly data points.

How are allergens controlled?

Separate weigh‑rooms, validated cleaning, and ELISA swab verification (< 5 ppm).

Can you support international registrations?

Yes, please contact for more information. 

Project Support & Next Steps

How do I request a quote?

Email sales@highland-labs.com or call +1 (503) 300-5400

What information speeds up quoting?

Target formula, capsule size, annual volume, preferred packaging, and launch date.

Do you offer graphic‑design services?

Yes—our in‑house studio delivers retail labels, Amazon A+ content, and lifestyle renders.

Can production scale as my brand grows?

Our capacity exceeds one billion capsules per year with incremental batch‑size options.

Who will be my point of contact?

You’ll have a dedicated account manager plus an R&D scientist for technical questions.

Capsule FAQs

How long does gelatin take to dissolve in the stomach?

About 10 minutes at 37 °C under fasting conditions.

Can hard‑shell capsules be Kosher and Halal?

Yes—appropriate certificates are provided with each lot.

What’s the difference between delayed‑release and enteric coating?

Delayed‑release shells are inherently acid‑resistant; enteric coating adds a protective polymer layer after encapsulation.

Do plant‑based capsules contain titanium dioxide?

We offer TiO₂‑free shells that comply with EU 2022/63.

How do you calculate capsule fill weight?

Bulk tamping density (g/cc) × shell volume (cc) = theoretical fill weight.

What causes capsule brittleness?

Relative humidity below 30 %; we humidify rooms and use foil liners to prevent moisture loss.

Additional FAQs

 Can you encapsulate CBD or hemp extracts?

Yes—in-state‑compliant SKUs with cannabinoid potency and contaminant testing.

Do you provide climate‑data loggers with each shipment?

Upon request, we include real‑time temp/RH data loggers in export pallets.

Are your excipients gluten‑free?

All standard excipients are USP grade and tested < 5 ppm gluten.

What is the shelf life of probiotics in capsules?

24 months when validated with delayed‑release shells and silica‑gel desiccant packs.

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