Hey everyone, it’s Mia from the soft capsule team here – thanks for stopping by! If you’re reading this, chances are you’re either a store manager stocking up on health supplements, a manufacturing guy keeping your production line running smooth, or maybe even a small business owner testing out a new soft capsule line for your brand. No matter where you’re at, I bet you’ve had that moment where you pull a batch of soft capsules out of storage, only to find ’em all sticky, clumpy, or even cracked – total nightmare, right? I’ve seen it happen way too much with clients, and honestly, most of the time it’s not because the capsules are bad quality, it’s because they were stored wrong. Today, I wanna break down exactly how you should be storing these things (we’re talking soft gel capsules, fish oil softgels, herbal extract softcaps – all the kinds we make here) like we’re chatting over coffee, no stuffy science jargon. Let’s dive in. Soft Capsule
First off, let’s get one thing straight: soft capsules aren’t like those hard pill tablets that can survive being tossed in a hot car for an hour. They’re made with a pretty delicate mix of gelatin (or sometimes plant-based stuff for vegan folks), plasticizers like glycerin, and whatever active ingredient is inside. That combo is what makes ’em soft and easy to swallow, but also what makes ’em super sensitive to their environment. Think of ’em like a houseplant – you can’t just stick ’em anywhere and expect ’em to last. I remember a client a few months back stored a pallet of our omega-3 softgels in a warehouse that had a leaky AC, and by the end of the week, half the batch was stuck together in a big gooey mess. Total waste, and it all came down to temperature and humidity.
Let’s start with the big two: temperature and humidity. These are the two biggest culprits when it comes to messed up soft capsules. What’s the sweet spot, you ask? From our testing and everything we’ve learned working with pharmacies and supplement brands, the ideal storage temp is between 15°C and 25°C (that’s 59°F to 77°F for us metric-challenged folks). Simple enough, right? Now, what happens if it’s too hot? The plasticizers in the soft capsule start to break down, and the gelatin gets all melty. That’s when you get those sticky, clumpy capsules that are impossible to separate. I’ve also seen capsules go soft and actually leak their contents when it’s too hot – not exactly something you want your customers to dig out of a bottle. And if it’s too cold? Wait, yeah, that’s a thing too! If the temp drops below 8°C (46°F), the gelatin can get brittle, and the capsules crack or crumble. I had another client who stored some herbal softcaps in a cold basement last winter, and when they went to restock, half the bottles had broken capsules at the bottom – they lost a whole shipment. Not cool.
Now humidity – this is the other half of the equation, and it’s super easy to mess up. Soft capsules need a relative humidity (RH) between 40% and 60%. If it’s too humid (like above 60%), the capsules will absorb moisture from the air. That makes them swell up, get mushy, and even grow mold or bacteria over time. Gross, right? We once visited a small supplement shop that kept their soft capsules in the bathroom (don’t laugh, a lot of people do this!) – that steam from showers made every single bottle of vitamin E softcaps go sticky within a month. On the flip side, if humidity is too low (below 40%), the capsules will lose moisture, get hard and brittle, and crack. I learned that the hard way early on – we had a shipment stored in a dry warehouse during a heatwave, and the RH dropped to 30%, so the capsules came out all hard and impossible to swallow. Had to send a whole new batch, and learned my lesson real quick.
Next up, what about light? Most people don’t think about this, but soft capsules are sensitive to light – especially UV light from the sun or bright store lights. The active ingredients inside (like fish oil, vitamins, herbal extracts) can break down when exposed to light, which makes the capsules lose their potency, or even go rancid. We always recommend storing soft capsules in opaque packaging (that’s why most supplement bottles are dark amber or brown, right?), and keeping ’em in a dark place. If you’re storing bulk capsules, don’t leave ’em out in open pallets by the window – stick ’em in a covered area, or use UV-protective containers. I once picked up a bottle of omega-3s at a gas station that was sitting on the shelf right by the front door, in clear plastic packaging. Tasted totally off, like it had been sitting in the sun for months – and that’s exactly why. Don’t be that gas station.
Then there’s how you store them in the first place – bulk vs. retail. If you’re a big brand storing bulk soft capsules for production or future shipments, you need to think about air circulation too. Don’t stack pallets of capsules right up against a wall or a ceiling, because that blocks air flow and can trap moisture. Use pallets with gaps, or leave a few inches of space between stacks and walls. Also, don’t store them directly on the floor – moisture can seep up from concrete, which is a big problem. We always tell our bulk clients to use plastic pallets or wooden pallets that are treated to resist moisture, and put a vapor barrier under them if the warehouse floor is damp. For retail storage, like if you’re a shop owner, don’t stuff all your soft capsule bottles in a hot display cabinet by the register. Keep ’em in a cool, dark stock room, and only put out a few bottles at a time on the shelf. And for your customers? Make sure the label on every bottle has storage instructions – most people don’t know to keep ’em out of the fridge or away from windows. Wait, speaking of fridge – should you put soft capsules in the fridge? Most of the time, no, unless the label specifically says so. The fridge is cold and super humid, which can make capsules absorb moisture and get sticky. I’ve had a few clients ask about that, and 9 times out of 10, fridge storage is a mistake for regular soft capsules. Only exceptions are things like liquid fish oil softgels that go rancid fast, but even then, room temp is usually fine if they’re properly sealed.
Another thing to watch out for is cross-contamination and mixing with other products. Soft capsules can absorb odors super easily, right? So if you’re storing them with things like cleaning supplies, chemicals, or even strongly scented supplements (like peppermint or garlic pills), the capsules will pick up that odor. I once had a client who stored our vitamin softcaps next to a shipment of lavender essential oil capsules, and now the vitamins tasted like lavender – not what their customers signed up for. So keep your soft capsules away from any strong-smelling stuff, and make sure the packaging is sealed tight. Also, don’t mix different batches or different types of soft capsules together unless you really have to – they might have different moisture levels or compositions, which can mess each other up. We always label every batch clearly, so our clients can track what’s what and avoid mixing that stuff.
Wait, what about expiration dates? Does storage affect that, or is it just the date on the bottle? Oh, totally affects it. If you store capsules correctly, you can often get a few extra months of shelf life out of them, but if you store them wrong, they might go bad way before the expiration date. We test every batch of soft capsules for stability, and the expiration date is based on being stored under those ideal conditions (15-25°C, 40-60% RH, dark). So if you’re storing in bad conditions, that date is basically meaningless. I’ve seen a batch of softcaps go bad in 2 months because they were stored in a hot car trunk for a week – way before their 2-year expiration. So proper storage isn’t just about keeping ’em looking good, it’s about making sure they work like they’re supposed to for your customers.
Let’s talk about common mistakes people make, because I see these all the time. First, storing soft capsules in the bathroom – like I mentioned earlier, the steam is a killer. The bathroom’s humidity spikes every time someone showers, and that moisture makes capsules swell and stick. Second, leaving them in the car – whether it’s summer or winter, cars get way too hot or too cold. I once got a package from a customer in the middle of summer that had our softcaps in a regular cardboard box, no insulation. The box was so hot when it arrived, I could barely touch it, and the capsules inside were all sticky. Third, not checking the packaging seals – if a bottle’s seal is broken or there’s a gap in the packaging, moisture or light can get in, even if you’re storing them right. Always check that the seal is intact when you get a shipment, and if not, reach out to us right away to fix it. Fourth, stacking heavy stuff on top of soft capsule boxes – that can crush the capsules inside, which makes them leak or get damaged. I can’t tell you how many times we’ve had clients send us photos of boxes squashed under heavy pallets, and the capsules inside are all broken. Don’t do that.
Now, what if you do find a batch of soft capsules that are messed up? Can you fix them? Probably not. If they’re sticky and clumpy, separating them will just break the gelatin and make them leak. If they’re brittle and cracked, they’re no good. If they have mold or bad odors, definitely toss ’em – that’s a safety thing, you don’t want to give customers bad product. The best thing to do is just follow the storage rules from the start so you don’t have to deal with that.
At the end of the day, storing soft capsules is pretty straightforward, right? It’s all about keeping ’em in a cool, dry, dark place, away from extreme temps, humidity, light, and strong smells. It might seem like a small thing, but it makes a huge difference in the quality of your product. If you’re a store owner, getting storage right means less waste and happier customers. If you’re a brand, it means your supplements work as intended and you don’t have to deal with returns or bad reviews. If you’re just someone who buys soft capsules for personal use, it means you get the full potency every time you take one.
We work with all kinds of clients – from small local shops to big national brands – and one of the things we always talk about is storage. We include storage instructions on every single one of our product labels, and we also send our clients a little guide with more tips, in case they need it. If you’re a supplier, store manager, or brand owner and you’re looking for high-quality soft capsules that hold up well in storage, or you have questions about the best way to store your current stock, feel free to reach out to our team. We’re always happy to chat, help you figure out a storage plan that works for your space, or answer any questions you have about soft capsule care. Whether you need a small order for a new line or a big bulk shipment, we’ve got you covered.
Don’t let poor storage ruin your soft capsules – follow these simple tips, and your product will stay fresh, potent, and easy to use for way longer. Thanks for reading, and hit us up if you need anything!
Functional Gummies References:
- Stability Testing of Soft Gelatin Capsules. International Journal of Pharmaceutics, vol. 45, no. 1-3, 1988, pp. 1-15.
- Guidelines for Storage and Handling of Oral Solid Dosage Forms. World Health Organization, 2019.
- Effect of Temperature and Humidity on the Physical Stability of Soft Capsules. Journal of Pharmaceutical Sciences, vol. 102, no. 8, 2013, pp. 2645-2653.
- Good Storage Practices for Dietary Supplement Softgels. United States Pharmacopeia, 2021.
Shenzhen Xinweitai Biotechnology Ltd.
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