Best Empty Capsules

Whether you’re looking to create custom supplement blends, control your ingredient quality, or save money on pre-made vitamins, empty capsules give you complete freedom over your wellness routine. From gelatin to vegetarian options, finding the right capsules can make DIY supplementation simple and cost-effective.

We’ve researched the top empty capsules on Amazon to help you find the perfect option for filling with herbs, powders, and custom supplement formulations.

Our Top Picks at a Glance

• Best Overall: Capsuline Size 0 Empty Gelatin Capsules
• Best Vegetarian: XPRS Nutra Size 00 Empty Vegan Capsules
• Best Value: PureCaps USA Empty Gelatin Capsules Size 00
• Best Large Size: Capsuline Size 000 Empty Gelatin Capsules
• Best Small Size: Capsuline Size 3 Empty Gelatin Capsules
• Best for Bulk: Capsule Connection 1000 Empty Gelatin Capsules
• Best Premium Quality: BulkSupplements Empty Capsules

Detailed Comparison Table

Product	Capsule Size	Count	Material Type	Price Range	Rating
Capsuline Size 0	Size 0	1000	Gelatin (Bovine)	$$	4.7/5
XPRS Nutra Vegan	Size 00	100	HPMC Vegetable	$	4.6/5
PureCaps USA	Size 00	1000	Gelatin	$	4.5/5
Capsuline Size 000	Size 000	1000	Gelatin (Bovine)	$$	4.7/5
Capsuline Size 3	Size 3	1000	Gelatin (Bovine)	$$	4.6/5
Capsule Connection	Size 00	1000	Gelatin (Beef)	$$	4.6/5
BulkSupplements	Various Sizes	300-1000	Gelatin/Vegetarian	$$	4.5/5

Detailed Product Reviews

1. Capsuline Size 0 Empty Gelatin Capsules – Best Overall

View on Amazon

Capsuline has established itself as a premium capsule manufacturer, and their Size 0 gelatin capsules represent the gold standard for DIY supplement filling. Made from 100% pharmaceutical-grade bovine gelatin, these capsules offer exceptional quality and reliability for creating custom supplement formulations.

What We Like:

• Farma Loc technology provides superior locking mechanism to prevent leakage
• Manufactured in cGMP-certified facilities meeting all health compliance standards
• Kosher and Halal certified with no pork, additives, or contaminants
• Allergen and gluten-free formulation suitable for most dietary restrictions
• Size 0 holds 300-500mg of powder depending on density
• Capsules work excellently with both manual and machine filling
• Available in multiple count options from 100 to 5000 capsules

What Could Be Better:

• Higher price point compared to budget brands
• Not suitable for vegetarians or vegans due to gelatin source
• May become brittle if stored in very dry conditions

Bottom Line: Capsuline Size 0 capsules deliver professional-grade quality for serious DIY supplement makers. The Farma Loc technology and pharmaceutical-grade materials justify the premium price if you want capsules that lock securely and maintain ingredient freshness. Perfect for regular supplement makers who value reliability.

2. XPRS Nutra Size 00 Empty Vegan Capsules – Best Vegetarian

View on Amazon

For those following plant-based diets, XPRS Nutra offers excellent vegetarian capsules made from HPMC (hydroxypropyl methylcellulose) vegetable cellulose. These capsules provide all the benefits of gelatin capsules without any animal-derived ingredients.

What We Like:

• 100% HPMC vegetable cellulose – completely vegan-friendly
• Click-shut design prevents powder leakage and waste
• Size 00 holds 600-1100mg depending on powder density
• Transparent design makes precise filling easier
• Works with both manual filling and capsule machines
• Dissolves efficiently in gastrointestinal tract for maximum absorption
• No preservatives, gelatin, or animal products

What Could Be Better:

• Smaller count per bottle means more frequent reordering
• Slightly higher per-capsule cost than gelatin options
• May be more moisture-sensitive than gelatin capsules

Bottom Line: XPRS Nutra vegan capsules offer an excellent plant-based alternative without compromising on quality or functionality. The larger Size 00 format makes them ideal for bulky supplements like turmeric or herbal blends. Great choice for vegans and vegetarians who want complete control over their supplement ingredients.

3. PureCaps USA Empty Gelatin Capsules Size 00 – Best Value

No products found.

View on Amazon

PureCaps USA delivers quality gelatin capsules at an affordable price point, making them perfect for beginners or budget-conscious supplement makers. These capsules offer excellent value without sacrificing essential quality standards.

What We Like:

• Non-GMO certified with no SLS, gluten, or preservatives
• 1000 separated capsules for easy filling
• Size 00 provides generous capacity for most supplements
• Competitive pricing makes them accessible for regular use
• Clear color allows visibility of contents
• Manufactured to pharmaceutical standards
• Available in both separated and joined formats

What Could Be Better:

• Locking mechanism not as advanced as premium brands
• May require more careful handling to prevent breakage
• Limited size options compared to specialty brands

Bottom Line: PureCaps USA offers solid quality at an attractive price, making them ideal for those new to DIY supplements or anyone wanting to minimize costs. While they may lack some premium features, they perform well for standard supplement filling applications and represent excellent value for money.

4. Capsuline Size 000 Empty Gelatin Capsules – Best Large Size

View on Amazon

When you need maximum capacity for bulky supplements or high-dose formulations, Capsuline’s Size 000 capsules deliver. These extra-large capsules can hold significantly more powder than standard sizes, reducing the number of capsules you need to take.

What We Like:

• Largest standard size available holds 800-1200mg of powder
• Same Farma Loc technology as other Capsuline products
• Pharmaceutical-grade bovine gelatin from certified facilities
• Kosher and Halal certified with no additives or contaminants
• Ideal for bulky herbs, fiber supplements, or high-dose vitamins
• Reduces daily pill burden for those taking multiple supplements
• Available in counts from 100 to 5000 capsules

What Could Be Better:

• Larger size can be difficult for some people to swallow
• Requires more material to fill each capsule
• Premium pricing reflects specialized size and quality

Bottom Line: Capsuline Size 000 capsules are perfect for anyone needing to encapsulate large amounts of powder or bulky ingredients. The extra-large capacity means fewer capsules per dose, though you’ll want to ensure you’re comfortable swallowing larger pills before committing to bulk purchases.

5. Capsuline Size 3 Empty Gelatin Capsules – Best Small Size

View on Amazon

For those who struggle with swallowing larger pills or need precise micro-dosing capabilities, Capsuline’s Size 3 capsules provide a compact solution. These smaller capsules make supplementation more comfortable while maintaining Capsuline’s quality standards.

What We Like:

• Compact size 3 format easier to swallow for many people
• Holds 150-300mg – perfect for potent supplements or micro-dosing
• Same pharmaceutical-grade quality as larger Capsuline products
• Farma Loc technology prevents leakage despite smaller size
• Kosher and Halal certified with allergen-free formulation
• Ideal for children’s supplements or precise dosing
• Multiple bulk options available

What Could Be Better:

• Smaller capacity means more capsules needed for higher doses
• Can be fiddly to fill due to compact size
• Not compatible with all capsule filling machines

Bottom Line: Size 3 capsules excel for precise dosing, potent supplements, or anyone who finds standard capsules too large to swallow comfortably. While they require more capsules per dose for bulky supplements, they offer unmatched convenience for those prioritizing ease of swallowing.

6. Capsule Connection 1000 Empty Gelatin Capsules – Best for Bulk

View on Amazon

Capsule Connection has been a trusted name in the supplement industry since 1973, and their bulk capsules represent decades of expertise. These USA-made capsules offer reliable quality for regular supplement makers who need consistent supply.

What We Like:

• USA-made gelatin capsules from beef only (no pork)
• Founded by natural health pioneer Howard Mechanic in 1973
• All capsules are Kosher, Halal, GMO-free, and gluten-free
• BSE-free and TSE-free certification for safety
• Fast-dissolving in stomach for optimal absorption
• Size 00 provides versatile capacity for most supplements
• Resealable bag maintains freshness

What Could Be Better:

• Less advanced locking technology than some premium brands
• Limited size variety compared to specialty manufacturers
• Separated capsules may require more storage space

Bottom Line: Capsule Connection offers solid American-made quality backed by nearly 50 years of industry experience. Their straightforward approach and reliable performance make them ideal for regular users who want dependable capsules without unnecessary frills. The company’s rich history in natural health adds credibility to their products.

7. BulkSupplements Empty Capsules – Best Premium Quality

No products found.

View on Amazon

BulkSupplements has built a reputation for pure, high-quality supplement ingredients, and their empty capsules maintain that standard. Available in both gelatin and vegetarian options across multiple sizes, they offer flexibility for various supplementation needs.

What We Like:

• Multiple size options from Size 00 to Size 4 available
• Both gelatin and vegetarian capsule varieties offered
• Laboratory-tested for purity and quality
• Various count options from 300 to 1000 capsules
• Clear or colored capsules available depending on preference
• Trusted brand known for supplement quality
• Consistent sizing and quality control

What Could Be Better:

• Premium pricing compared to budget options
• Some sizes have limited availability
• May require ordering from specific product lines

Bottom Line: BulkSupplements brings their commitment to purity and quality to the empty capsule market. While pricing reflects their premium positioning, you’re paying for reliable quality control and consistent performance. Excellent choice for those who want the same level of quality in their capsules as in their supplement powders.

What Are Empty Capsules?

Empty capsules are two-piece shells designed to hold powdered supplements, herbs, or medications. They come in various sizes and materials, allowing you to create custom supplement formulations with precise control over ingredients and dosages. The capsules consist of a body (the longer piece) and a cap (the shorter piece) that lock together to contain your chosen powder or extract.

Most empty capsules fall into two main categories: gelatin capsules (typically made from bovine or porcine sources) and vegetarian capsules (usually made from plant-based cellulose like HPMC). Gelatin capsules have been the traditional choice for decades due to their reliability, fast dissolution, and cost-effectiveness. Vegetarian capsules have gained popularity in recent years as more people adopt plant-based diets or have religious dietary restrictions.

The capsules themselves are designed to dissolve quickly in your stomach’s acidic environment, releasing the contents for absorption. Most quality capsules begin breaking down within 10-15 minutes of ingestion, making them an efficient delivery method for supplements. This rapid dissolution ensures that the active ingredients become available for absorption without unnecessary delay.

Benefits of Using Empty Capsules

Complete Ingredient Control

When you fill your own capsules, you know exactly what goes into your supplements. You can avoid fillers, binders, artificial colors, and preservatives commonly found in commercial supplements. This transparency is particularly valuable if you have allergies, sensitivities, or simply prefer to minimize unnecessary additives in your wellness routine.

Cost Savings

Buying bulk supplement powders and filling your own capsules often costs significantly less than purchasing pre-made supplements. While there’s an initial investment in capsules and possibly a filling machine, the long-term savings can be substantial, especially for supplements you take daily. You can purchase high-quality raw ingredients at wholesale prices and create months’ worth of supplements.

Customized Formulations

Empty capsules let you create unique supplement blends tailored to your specific needs. You can combine multiple ingredients in precise ratios, adjust dosages based on your requirements, and experiment with different combinations. This flexibility is impossible with pre-made supplements that come in fixed formulations.

Easier Swallowing

For those who struggle with swallowing tablets or dislike the taste of certain supplements, capsules provide a smooth, tasteless way to take your nutrients. The gelatin or vegetarian shell masks unpleasant flavors while being easier to swallow than tablets. You can also choose capsule sizes that match your swallowing comfort level.

Precise Dosage Control

By weighing your powders and filling your own capsules, you can achieve precise dosing that’s difficult to match with pre-made products. This precision is particularly important for potent supplements where exact dosing matters, or when you’re working with a healthcare provider on specific supplementation protocols.

How to Choose the Right Empty Capsules

Material Selection

Your first decision involves choosing between gelatin and vegetarian capsules. Gelatin capsules are traditional, cost-effective, and dissolve quickly. They’re made from animal collagen (usually beef or pork) and work well with most supplements. Vegetarian capsules (HPMC or pullulan) cost slightly more but suit plant-based diets and offer similar performance. Some people find vegetarian capsules more resistant to humidity and temperature changes.

Size Considerations

Capsule sizes range from 000 (largest) to 5 (smallest), with Size 00 and Size 0 being most common. Size 000 holds approximately 800-1200mg of powder, Size 00 holds 600-1000mg, Size 0 holds 300-500mg, and smaller sizes hold proportionally less. Consider both the volume of powder you need to encapsulate and your ability to swallow different sizes. Start with Size 0 or 00 if you’re unsure – these versatile sizes work well for most applications.

Quality Certifications

Look for capsules manufactured in cGMP-certified facilities that meet pharmaceutical standards. Certifications like Kosher, Halal, Non-GMO, and allergen-free status may be important depending on your dietary requirements. Quality capsules should be free from preservatives, synthetic dyes, and unnecessary additives. Third-party testing provides additional assurance of purity and quality.

Separated vs. Joined

Empty capsules come either pre-separated (body and cap already apart) or joined (need to be pulled apart). Separated capsules are slightly more convenient for filling but take up more storage space and may be more expensive. Joined capsules are more compact and often more economical, though they require the extra step of separation before filling.

Locking Mechanism

Premium capsules feature advanced locking technologies that prevent the cap from separating during handling and storage. Look for features like Farma Loc or similar technologies that ensure your filled capsules remain sealed until you’re ready to take them. Good locking prevents leakage and maintains the integrity of moisture-sensitive ingredients.

Tips for Filling Empty Capsules

Manual Filling Technique

For small batches, manual filling works well. Separate the capsules and stand the bodies upright in an egg carton or similar holder. Use a small spoon or scooper to carefully fill each body, tamping down gently to remove air pockets. Fill slightly above the rim, then place the cap on and press firmly to lock. Wipe away any excess powder with a clean cloth.

Using a Capsule Filling Machine

If you regularly fill capsules, investing in a capsule machine saves time and improves consistency. These devices hold multiple capsules and allow you to fill dozens at once. Simply place the separated capsule bodies in the machine, spread your powder across all capsules, tamp down, and cap. Machines range from basic manual tools to sophisticated semi-automatic systems.

Proper Storage

Store empty capsules in a cool, dry place away from direct sunlight. Heat and humidity can cause gelatin capsules to become brittle or stick together. Keep them in their original packaging or transfer to airtight containers. Once filled, store your capsules in a cool, dark place in sealed containers with silica gel packets if needed to control moisture.

Dosage Accuracy

For precise dosing, use a digital scale to weigh your powder before encapsulation. Different powders have different densities, so volume measurements can be unreliable. A scale accurate to 0.01g allows you to measure exact doses. Keep a log of your formulations, including ingredient weights and total capsules produced, for consistent results.

Safety Considerations

Always work in a clean environment when filling capsules. Wash your hands thoroughly and use clean tools. Avoid cross-contamination by cleaning equipment between different supplements. Label your filled capsules clearly with contents and date. Some supplements are light-sensitive or moisture-sensitive, so consider using opaque capsules or amber storage containers for these ingredients.

Common Capsule Sizes and Their Uses

Size 000 (Largest)

Holding 800-1200mg of powder, Size 000 works best for bulky supplements like fiber, large-dose vitamins, or herbal formulas. These are ideal if you want to minimize the number of capsules per dose but require comfortable swallowing of larger pills. Common uses include activated charcoal, psyllium husk, and high-dose vitamin C.

Size 00 (Very Large)

The most popular size for general use, Size 00 holds 600-1000mg and offers an excellent balance between capacity and swallowability. This size works well for most supplement applications including herbal blends, multivitamin formulations, and moderate-dose single supplements. Many commercial supplements use this size.

Size 0 (Large)

Holding 300-500mg, Size 0 provides a versatile option that’s easier to swallow than larger sizes while still offering decent capacity. This size is excellent for dense powders or situations where you want to take multiple capsules of different supplements. Common applications include amino acids, minerals, and moderately potent herbs.

Size 1 (Medium)

With 200-400mg capacity, Size 1 capsules work well for moderately dense supplements where you don’t need large amounts per dose. They’re comfortable for most people to swallow and popular for products like CoQ10, alpha-lipoic acid, and other concentrated supplements.

Size 3 (Small)

These smaller capsules hold 150-300mg and are ideal for potent supplements, micro-dosing applications, or people who struggle with larger capsules. They work well for children’s supplements (under appropriate supervision), highly concentrated extracts, or situations where precise small doses are needed.

Frequently Asked Questions

Are gelatin or vegetarian capsules better?

Both types perform well for most applications. Gelatin capsules are traditional, slightly less expensive, and dissolve very quickly. Vegetarian capsules (HPMC) cost a bit more but suit plant-based diets and may be more stable in varying humidity conditions. Choose gelatin if you have no dietary restrictions and want the most economical option. Opt for vegetarian capsules if you follow a plant-based diet or prefer plant-derived materials.

What capsule size should I start with?

Size 0 or Size 00 work well for most beginners. Size 00 holds more powder (600-1000mg) and is most commonly used commercially, while Size 0 (300-500mg) is slightly easier to swallow. If you plan to encapsulate bulky or low-density supplements, start with Size 00. For denser supplements or easier swallowing, try Size 0 first.

How long do empty capsules last?

When stored properly in a cool, dry place away from direct sunlight, empty capsules typically last 2-3 years or more. Gelatin capsules can become brittle if stored in very dry conditions or may stick together in high humidity. Vegetarian capsules tend to be more stable across varying conditions. Always check the manufacturer’s expiration date and inspect capsules before use for any signs of brittleness or deformation.

Can I use empty capsules for liquids or oils?

Standard gelatin and vegetarian capsules are designed for powders and may leak if filled with liquids or oils. For liquid supplements, look for specially designed sealed capsules or soft gels. Some manufacturers offer capsules specifically engineered for liquid filling, but these require sealing equipment. Most DIY supplement makers stick with powders to avoid leakage issues.

Do I need a capsule filling machine?

A filling machine isn’t essential but makes the process much faster and more consistent, especially if you fill capsules regularly. For occasional use or small batches (10-20 capsules), manual filling with a small spoon works fine. If you’re making larger batches or filling capsules weekly, a basic capsule machine (which costs $10-30) saves significant time and reduces mess.

Are empty capsules safe?

Yes, quality empty capsules from reputable manufacturers are very safe. They’re made from food-grade materials and manufactured to pharmaceutical standards. Gelatin capsules have been used safely for over a century, and vegetarian capsules have an excellent safety record. Always purchase from established brands that follow cGMP standards and avoid very cheap, unbranded capsules that may not meet quality standards.

How much powder fits in each capsule size?

Capacity varies based on powder density, but approximate ranges are: Size 000 (800-1200mg), Size 00 (600-1000mg), Size 0 (300-500mg), Size 1 (200-400mg), Size 2 (150-300mg), and Size 3 (150-300mg). Dense powders like minerals fill toward the lower end of these ranges, while fluffy powders like herbs fill toward the upper end. Tamping can increase capacity by 20-30%.

Can children use empty capsules?

Smaller capsule sizes (Size 3 or smaller) can be appropriate for children old enough to safely swallow pills, typically around age 7-8 or older, though this varies by child. Always supervise children taking any supplements and ensure they can swallow capsules safely. For younger children, it’s often better to mix supplement powders into food or drinks rather than using capsules.

Related Articles

• Best Multivitamins
• Best Vitamin C Supplements
• Best Magnesium Supplements
• Best Omega-3 Supplements
• Best Probiotic Supplements

Last updated: February 2026