If you’ve spent any time exploring the world of DIY supplements or herbal powders, you’ve almost certainly come across one particular tool: the size 00 gelatin capsule. It's become something of a legend in at-home encapsulation, a go-to for anyone looking to manage their own dosages of functional mushroom powders, nootropic stacks, or custom herbal mixes.
Why Size 00 Gelatin Capsules Are the DIY Standard
When you first start making your own supplements, the range of capsule sizes can seem a little confusing. They go from the tiny size 5 all the way up to the massive size 000. So what’s the big deal with size "00" (pronounced "double-zero")? It all comes down to a perfect blend of capacity and convenience.
Think of it this way: you wouldn't pack your lunch in a tiny sauce container, but you also wouldn't lug around a giant catering tray. You need something that just works. Size 00 capsules are that sweet spot. They're big enough to hold a substantial amount of powder but still small enough for most people to swallow without any trouble. This makes them perfect for all sorts of things, like:
- Herbal Supplements: Packing your own custom blends of turmeric, ashwagandha, or ginger.
- Functional Mushrooms: Getting a precise, consistent dose of lion's mane, reishi, or cordyceps.
- Nootropic Stacks: Combining different cognitive-boosting powders into one simple, easy-to-take capsule.
Understanding Capacity and Powder Density
Here’s one of the most important things to get your head around: a capsule’s size isn’t based on a fixed weight like milligrams (mg). It’s all about volume. A standard size 00 capsule will hold roughly 0.95 milliliters (ml). The actual weight of powder you can cram in there is a totally different story and depends completely on its density.
Picture this: you have two identical coffee mugs. You fill one to the brim with fluffy feathers and the other with fine sand. The mug of sand is going to be way, way heavier, right? The exact same thing happens with capsules. A size 00 cap filled with a light, airy powder like psyllium husk will weigh a fraction of what the same capsule filled with a dense, fine powder like creatine monohydrate would.
This is a huge deal when it comes to accurate dosing. It’s why just “filling up a capsule” won’t give you consistent results. Getting a feel for this relationship between a capsule's volume and your powder's density is the first real step to making supplements that are safe, effective, and perfectly tailored to you. It puts you in total control of your wellness journey.
How Much Powder Does a 00 Capsule Really Hold
So, you've got your 00 gelatin capsules and you're ready to start filling them. One of the first questions that pops up is a simple but crucial one: just how much powder can you actually fit inside? Getting this right is the key to accurate dosing, but the answer isn't a single magic number.
While a standard size 00 capsule always has the same volume—about 0.95 ml—the weight of the powder it can hold can swing wildly. It all comes down to the powder's density.
Think about it like packing a suitcase. You could stuff that same suitcase full of fluffy pillows or heavy books. The space you're filling is identical, but the final weight will be completely different. The exact same principle applies to your capsules.

This chart drives the point home. While size 00 capsules are popular for their solid capacity and how easy they are to swallow, that variable fill weight is something you absolutely have to get a handle on.
Powder Density Makes All The Difference
Understanding powder density is the secret to knowing how much a capsule can truly hold. Density is just a measure of how much stuff (mass) is packed into a certain amount of space (volume), usually written out as grams per milliliter (g/ml). A light, fluffy powder has a low density, while a fine, heavy powder has a high density.
For example, if you fill a 00 capsule with a light, airy powder like finely ground lion's mane mushroom, you might only get about 400-600 mg in there. But take that same capsule and fill it with a dense powder like turmeric or ginger root, and it could easily hold 700-900 mg.
The most important thing to remember is this: you can't just trust a generic chart for precise dosing. Every powder is different, and even different batches of the same powder can have slight density shifts depending on the fineness of the grind and moisture content.
The only way to be certain how much of your specific powder fits is to weigh it yourself. It’s the only method that guarantees you’ll get consistent and accurate doses every single time. If you're serious about getting it right, you can learn everything you need in our guide on how to properly use a 1-gram scale.
Estimated Fill Weight for Size 00 Capsules by Powder Density
To give you a better visual, this table shows how different powders can result in very different weights, even though they're all filling the same 0.95 ml capsule.
| Powder Type | Average Density (g/ml) | Estimated Weight per 00 Capsule (mg) |
|---|---|---|
| Flour (Very Light) | 0.5 g/ml | 475 mg |
| Lion's Mane (Light) | 0.6 g/ml | 570 mg |
| Magic Mushroom (Average) | 0.7 g/ml | 665 mg |
| Ginger Root (Dense) | 0.8 g/ml | 760 mg |
| Sugar (Very Dense) | 0.9 g/ml | 855 mg |
As you can see, the difference between a light powder and a dense one can be hundreds of milligrams. This is why just "eyeballing it" or going by volume alone isn't a reliable path to accurate dosing.
A Practical Rule of Thumb
While weighing is king, you can use a general rule to get a ballpark estimate. Most of the herbal and mushroom powders people work with fall into a density range of 0.6 g/ml to 0.8 g/ml.
You can get a rough idea of your capacity with this simple formula:
Estimated Weight (mg) = 0.95 ml x Powder Density (g/ml) x 1000
Here’s how that plays out with a couple of examples:
- For a lighter powder (0.6 g/ml): 0.95 ml x 0.6 g/ml x 1000 = 570 mg
- For a denser powder (0.8 g/ml): 0.95 ml x 0.8 g/ml x 1000 = 760 mg
This math gives you a solid starting point, but I can't say it enough: always confirm your results with a scale. Consistently weighing your filled capsules is the only way to remove the guesswork and ensure you’re getting the exact dose you're aiming for.
Choosing Between Gelatin and Vegetarian Capsules

After you've locked in size 00 for your capsules, the next fork in the road is deciding what they’re made of. It really boils down to two main players: the classic gelatin capsule and its modern vegetarian cousin. Getting to know them will help you choose the right shell for your ingredients, your diet, and your wallet.
The old-school favorite is the 00 gelatin capsule. For decades, these have been the gold standard, and for good reason—they’re dependable and easy on the budget. They’re made from bovine or porcine collagen, a natural animal protein that your body digests easily, letting the contents release quickly right where they need to.
Their popularity isn't just about being the first on the block. Gelatin capsules have a long, proven history of working well with a huge variety of powders. This rock-solid reliability is why so many people, from home users to large-scale producers, still swear by them.
The Rise of Vegetarian Capsules
With so many people moving toward plant-based living, vegetarian capsules have naturally stepped into the spotlight. You'll typically see these made from HPMC (hydroxypropyl methylcellulose), which is a fancy way of saying it’s a plant-based polymer sourced from wood pulp or cotton. They do the same job as gelatin but have a few unique perks.
Veggie caps are the go-to for anyone with dietary no-fly zones, whether it's veganism, religious practices, or allergies. They also have less moisture than gelatin capsules, which makes them a much better choice for any powders that are sensitive to humidity and might clump up otherwise.
A big reason gelatin still reigns supreme comes down to simple economics and performance. Research projects that gelatin capsules will dominate with a massive 60.2% of the empty capsule market by 2026. This is thanks to how well they work with machinery and their compatibility with a wide range of ingredients, particularly functional mushroom extracts. You can read the full research about the empty capsule market to dive deeper into these trends.
Gelatin vs. Vegetarian Pros and Cons
To make the choice crystal clear, let's break down the real-world differences between these two types of empty capsules.
- Cost: Gelatin is almost always the cheaper option. The manufacturing process has been around forever, making them less expensive to produce.
- Dietary Needs: If you're a vegan or follow religious dietary laws that forbid animal products, vegetarian (HPMC) capsules are your only real choice.
- Ingredient Compatibility: Gelatin is fantastic for most dry powders, but veggie caps are superior for anything that's sensitive to moisture. It's also worth noting that gelatin can have weird reactions with some liquids, so it's a no-go for oils.
- Durability: Both are tough, but gelatin can get brittle in super dry environments or a bit sticky when it's humid. HPMC capsules tend to hold up better across a wider range of temperatures and humidity levels.
Ultimately, what you pick comes down to what matters most to you. If you’re all about a proven track record and keeping costs low, 00 gelatin capsules are an excellent, no-fuss choice. But if you live a plant-based lifestyle or you're working with finicky powders, the extra cost for vegetarian capsules is definitely money well spent.
A Step-by-Step Guide to Filling Capsules at Home
Alright, you've got your powder and a fresh bag of 00 gelatin capsules. Now for the fun part: turning them into your own custom supplements. This process puts you squarely in the driver's seat. There are really two ways to go about it: the old-school manual scoop, which is great for small tests, and a capsule filling machine for when you need to make a bigger, more consistent batch.
No matter which path you choose, a clean workspace is non-negotiable. Seriously. Always start by washing your hands well and wiping down your work surface. A simple tray with a raised edge is your best friend here—it’ll catch any runaway powder and make cleanup a breeze.
The Manual Scooping Method
If you're only making a handful of capsules to start, the manual method is quick, easy, and doesn't require any special gear. It’s a great way to get a feel for your powder and how it behaves without much commitment. It’s hands-on and straightforward, though it takes a little practice to get your technique down.
Here’s the basic rundown:
- Separate the Capsule: Gently pull apart the capsule into its two pieces—the longer body and the shorter cap.
- Scoop the Powder: Put a small pile of your powder onto a clean, flat surface. Use the longer capsule body like a tiny shovel to scoop up the powder until it’s full.
- Tamp and Fill Again: To get more powder in, you can use a small tool (even the end of a pen works) to gently tamp it down. This packs it in, letting you scoop again for a denser capsule.
- Seal It: Once you’re happy with the fill, pop the cap back onto the body. You should feel a satisfying "click" as it locks into place, ensuring nothing spills out.
This approach works just fine for a few caps, but you'll notice it's tough to get the weight consistent every time. If you start making them more often, you’ll quickly appreciate why people upgrade to a machine.
Using a Capsule Filling Machine
For anyone getting serious about making their own capsules, a filling machine is a total game-changer. These things are surprisingly affordable and let you fill 100 capsules all at once. They make the whole process faster, cleaner, and, most importantly, way more consistent.
Getting a capsule machine is the difference between hand-washing a mountain of dishes and just loading the dishwasher. Both get the job done, but one turns a tedious chore into a streamlined, almost meditative process that gives you much better results.
The whole process is pretty simple:
- Load the Bodies: Separate your 00 gelatin capsules and drop the long bodies, open-end-up, into the holes on the machine's base.
- Spread the Powder: Pour your pre-weighed powder over the base and use the included spreader card to sweep it back and forth, making sure every single capsule body gets filled.
- Tamp and Repeat: Grab the tamping tool and press down firmly to compact the powder. This makes room for more, so you can add another layer of powder to hit your target weight.
- Cap the Capsules: Place the top part of the machine, which holds all the little caps, onto the base. Press down firmly and evenly, and just like that, you've sealed all 100 capsules in one go.
This method isn’t just a massive time-saver; it also keeps the mess to a minimum. Best of all, it gives you a uniform batch, so you can be confident that every capsule delivers the exact, consistent dose you were aiming for.
How to Store Your Capsules to Keep Them Perfect

Getting your capsules filled just right is only half the battle. Storing them properly—whether they're empty or full—is every bit as crucial. Since they're made from natural collagen, 00 gelatin capsules are surprisingly sensitive to their environment. One wrong move can turn your perfectly good caps into a sticky, clumped-together mess or make them so brittle they crack the second you touch them.
You can almost think of gelatin capsules like a delicate pastry. You wouldn't leave it out in the sun or next to a steamy dishwasher, right? They need to be protected from heat, light, and especially moisture to stay perfect.
The same logic applies here. Storing them correctly isn't just about preserving the capsules; it’s about protecting the potency and integrity of whatever you've put inside.
Ideal Storage Conditions
The secret to keeping your capsules in top form is all about maintaining a stable environment. What you're looking for is a cool, dark, and dry spot where the temperature and humidity don't do a daily dance. A bedroom closet or a kitchen pantry is usually a much safer bet than a steamy bathroom cabinet or a shelf right over the stove.
Here are the sweet spots you want to aim for:
- Temperature: Keep them somewhere between 59-77°F (15-25°C). Definitely avoid direct sunlight or spots near radiators and other heat sources.
- Humidity: The ideal range for relative humidity is between 35% and 65%. Too much moisture will make them soft and sticky, while too little will turn them into fragile, crackly shells.
An airtight container is your best friend for fighting off environmental shifts. Tucking your 00 gelatin capsules away in a sealed glass jar not only shields them from humidity but also keeps them clean and ready to go.
Proper handling is part of proper storage, too. Always make sure your hands are completely dry before you reach for your capsules. Even a tiny bit of moisture can make them tacky and a real pain to work with. If you're looking for more tips on preserving delicate materials, check out our guide on the best way to store shrooms. By following these simple guidelines, you can make sure every capsule stays ready for action, keeping your contents safe and effective.
What to Look for When Buying Quality Capsules
Think all empty capsules are the same? Think again. When you're ready to grab a supply of 00 gelatin capsules, it’s worth remembering that the quality of the capsule itself is just as important as what you put inside. A little know-how can make all the difference between a top-shelf product and a cheap knock-off.
One of the biggest tells of a quality capsule is right on the label. Always look for capsules that are clearly marked "BSE/TSE-free." This is your guarantee that the bovine gelatin comes from cows that are free from Bovine Spongiform Encephalopathy (mad cow disease) and other nasty transmissible diseases. It’s a critical safety standard you absolutely shouldn't skip.
Sourcing and Supplier Trust
Beyond the basic certifications, you’ll want to find a reputable supplier who cares about transparency and your privacy. A good seller won't be shy about where their capsules come from and the quality standards they meet. This is especially true if you're using them for personal wellness, where purity is everything.
You'll also run into options for "joined" or "separated" capsules. Here's the simple breakdown:
- Joined Capsules: These are the standard. They come pre-locked and you just need to pull them apart before filling.
- Separated Capsules: This is a huge time-saver. The caps and bodies are already separated in the bag, making them perfect for anyone using a capsule filling machine.
For those serious about crafting their own supplements, you can shop for magic mushroom capsules from sources that get these quality distinctions and cater to the community.
Choosing a high-quality, pharmacopeial-grade capsule is your first line of defense in creating safe and effective supplements. It ensures the shell itself is pure, free from contaminants, and manufactured to meet stringent health and safety standards.
In the U.S., a massive chunk of the capsule market, quality control is a big deal. The best suppliers offer BSE/TSE-free gelatin from bovine collagen to meet safety demands. The market for hard 00 gelatin capsules—the perfect size for powders—is projected to hit $2,075.46 million by 2026, which just goes to show how trusted they've become in both medicine and wellness. You can discover more about gelatin capsule market trends and see just how important they are becoming.
Your Top Questions About 00 Gelatin Capsules, Answered
Jumping into the world of DIY capsules can bring up a few questions, whether you're a seasoned pro or just getting started. We’ve heard them all, so we’ve put together some quick, straightforward answers to the most common queries about 00 gelatin capsules.
Are Gelatin Capsules Actually Safe to Take All the Time?
Absolutely. Pharmaceutical-grade gelatin capsules are made from natural collagen, a protein your body digests easily. It’s a material that's been the go-to standard in medicine and supplements for more than a hundred years, precisely because it has such a stellar safety record.
The only catch? You have to trust your source. Always get your capsules from a reputable supplier to make sure you're getting a pure, clean product.
Help! Why Did My Gelatin Capsules Get All Sticky and Gross?
This is almost certainly a storage problem. Gelatin is a magnet for moisture, and it's incredibly sensitive to the environment around it. If the air is humid, the capsules will soak up that moisture and turn soft and sticky. If the air is too dry, they’ll become brittle and crack when you try to handle them.
Think of your capsules like you would a bag of fancy coffee beans—they need to be protected. The key is to keep them in a sealed, airtight container, tucked away in a cool, dark place. The ideal humidity is somewhere between 35% and 65%. A kitchen pantry works great; a steamy bathroom cabinet is a recipe for disaster.
Can I Fill 00 Gelatin Capsules With Oils or Tinctures?
That’s a definite no. Standard 00 gelatin capsules are made specifically for dry, powdered ingredients. Most liquids, especially anything water-based, will start to dissolve the gelatin shell almost immediately. You’ll end up with a leaky, sticky mess and a completely wasted dose.
If you’re working with oils or other liquids, you’ll need to look for specialized "softgel" capsules. Those are built differently and hermetically sealed to hold liquids without falling apart, keeping your ingredients safe and sound until you're ready for them.
Ready to get your DIY projects off the ground? The Magic Mushroom Delivery has the premium, high-quality 00 gelatin capsules you need for safe and successful creations. Stock up on quality capsules for your wellness journey today!





