Separate incompatible ingredients
Keep a liquid and a powder apart in one dose, so a formula that would not work in a standard capsule becomes possible.
Capsule-in-capsule technology
Dual capsule (capsule-in-capsule) contract manufacturing
Liquid in the outer capsule, powder in the inner capsule: two phases in one dose. BIO PAK makes dual capsules for private label and white label brands in our own facility in Slovenia, EU, so ingredients that don’t work well together can finally share one product.
8fully automatic filling machines
500M+capsules produced per year
15 yearsof experience as a family business
FSSC 22000ISO 22000 · GMP · EU Organic · FDA
What is a dual capsule?
A dual capsule, also called a capsule in capsule, is a hard capsule that holds a second, smaller capsule inside it. The outer capsule is filled with a liquid, the inner capsule with a powder. The two phases sit in separate compartments within a single dose.
That lets you build formulations that simply aren’t possible in a standard capsule, because ingredients that don’t work well together no longer have to share the same space.
BIO PAK makes dual capsules in our own facility in Kranj, Slovenia (EU) for private label and white label brands, from start-ups to multinational groups.
What a dual capsule lets you do
Control when each ingredient is released
Release can be staged: the liquid outer phase is released first, the powder in the inner capsule follows.
Combine fast and slow phases
Put a fast-release liquid in the outer capsule and a delayed or targeted-release powder in the inner capsule.
Protect sensitive actives
Keep sensitive ingredients such as probiotics, oils and vitamins in a compartment of their own.
Formulation ideas for dual capsules
Examples of where brands use the format. Your own formula is developed to your brief.
Gut health and microbiome
Probiotics, prebiotics and oils in separate layers, with live cultures protected in the inner capsule.
Energy and performance
A quick-acting liquid phase on the outside and a delayed-release phase inside, in one dose.
Sleep and mood
Fast-release ingredients in the outer phase and slow-release ingredients in the inner capsule, staged over time.
Beauty and nutricosmetics
Oils such as omega alongside powdered actives such as biotin and zinc, in a single capsule.
Dual capsule specifications
- Format
- Capsule in capsule: liquid in the outer capsule, powder in the inner capsule
- Shell
- Vegan HPMC or gelatine
- Appearance
- Clear outer capsule with a coloured inner capsule
- Packaging
- Bottles or blisters
- Brands
- Private label and white label
- Production
- In-house on fully automatic machines in Kranj, Slovenia, EU
- Capacity
- Over 500 million capsules per year on 8 fully automatic machines (all products)
- Certificates
- FSSC 22000, ISO 22000, GMP, EU Organic and FDA
From brief to finished product
Dual capsules follow our A to Z production: one partner for every step.
- 1
Brief and development
Tell us what you want to make. We turn your concept into a formulation that fits a dual capsule.
- 2
Ingredient sourcing
Premium natural raw materials, sourced by us.
- 3
Filling and production
Capsules made in-house, with the liquid outer phase and the powder inner capsule.
- 4
Packaging and your label
You receive a finished product in bottles or blisters, ready to sell.
Why brands choose BIO PAK
One partner for dual capsules and every other supplement format you may need next.
- Dual capsules are our specialtyTogether with liquid capsulation in hard shells.
- Made in the EUEverything is produced in our own facility in Kranj, Slovenia.
- Certified qualityFSSC 22000, ISO 22000, GMP, EU Organic and FDA.
- Fast communication and short lead timesOne team from first idea to finished product.
- Competitive pricingTrusted by more than 170 brands worldwide.
Dual capsule FAQ
What is a dual capsule?
A dual capsule (capsule in capsule) is a hard capsule with a smaller capsule inside it. At BIO PAK the outer capsule is filled with a liquid and the inner capsule with a powder, so two phases are delivered in one dose.
What can I combine in a dual capsule?
A liquid, such as an oil, in the outer capsule and a powder, such as probiotics, vitamins or other actives, in the inner capsule. Send us your formulation and we will tell you how it can be built.
Why use a dual capsule instead of a standard capsule?
A dual capsule keeps ingredients that don’t work well together apart, lets you stage the release of each phase and protects sensitive actives. It also gives the product a visibly different, premium look.
Are dual capsules vegan?
They can be. We make capsules from vegan HPMC or from gelatine, so you can choose the shell that fits your brand.
How are dual capsules packaged?
In bottles or blisters. We also make powder products in stick packs and pouches.
Can I choose the colour?
Yes. The inner capsule can be made in a choice of colours. You can try the options in our supplement builder.
Do you make dual capsules under private label?
Yes. We work with private label and white label brands, from start-ups to multinational groups, and take care of every step from formulation to packaging.
Where are dual capsules made, and which certificates do you hold?
In our own facility in Kranj, Slovenia (EU). Our certificates include FSSC 22000, ISO 22000, GMP, EU Organic and FDA.
How do I start a dual capsule project?
Send us a short brief through the quote form or the supplement builder. Tell us what you want to make, and we reply by email.
Develop a dual capsule product for your brand
Tell us what you want to make. We reply by email.