Updated October 2026
A probiotic or a bottle of gummies needs the storage conditions on its label from the day it arrives to the day it ships. Most capsules and tablets don't, so the question is worth asking one product type at a time.
Most capsules and tablets are shelf-stable. The supplements that can be damaged by heat or moisture are probiotics, gummies, and softgels or fish oil. Each of those needs:
Our warehouses are dry and ambient, and some are air-conditioned, but none of them keeps a set temperature or humidity range.
By The Fulfillment.com team
Many brands in nutraceutical fulfillment treat storage as all or nothing, and it goes wrong both ways. Put the whole catalog in cold storage and you pay to chill capsules that never needed it. Keep everything at room conditions and the probiotic whose label says refrigerate is at risk.
Capsules and tablets that are shelf-stable ship fine at room conditions. The products that need more are the ones whose chemistry or form breaks down in heat or humidity. You can pick them out of your own catalog.
Keeping a product in the right range protects it while it sits on the shelf. It doesn't decide which dated lot ships first. That is a separate rule, and a sensitive SKU usually needs both. We explain the rule in FEFO vs FIFO for supplements.
Probiotics. The cultures in a probiotic are alive, and the CFU (colony-forming unit) count on the label is only true while they survive. Heat kills them faster. A probiotic kept warmer than its label allows, on a shelf or on a hot truck, can drop below the potency it promises. Many strains call for cool or refrigerated storage, and staying inside the label's range is what protects the count your customer paid for.
Gummies. A gummy is pectin or gelatin. Heat melts gummies and fuses them into a lump, and humid air makes them soak up moisture and clump. Customers judge a gummy bottle by how it looks when they open it. A melted or stuck-together bottle comes back whether or not the actives are intact. Gummies need both temperature and humidity kept steady.
Softgels and fish oil. In heat, softgel shells go soft and stick to each other. The oils inside oxidize and go rancid with heat and light. That covers fish oil, omega-3 and vitamin E carriers. The customer gets a weaker product with an off smell and takes it for a defect. Cool storage away from light slows both problems down.
Effervescents and other moisture-critical forms. Effervescent tablets react with moisture in the air and lose their fizz, and some powders clump. Humidity does more harm here than heat. What matters is how much moisture is in the air where they are stored (the dew point), not only the temperature.
A label on a rack won't tell you what a building can keep. Put these three questions to any warehouse that wants your supplements.
What range does the building keep, in numbers? Ask for the temperature and humidity range in each building, how it is recorded and which kinds of SKU it covers. Then compare those numbers with the storage statement on each of your labels. Air conditioning is not the same thing as a set range. If a label of yours calls for one, tell us early, and we will say plainly what our buildings can and cannot keep.
What happens to a heat-stressed inbound lot? A lot can be damaged before it ever reaches a shelf, on a hot ride in from the manufacturer. If that is caught before the lot is sold, the lot is held. If it is caught after the orders have shipped, the result is a wave of quality returns. Ask what the warehouse does with a lot that arrives heat-stressed. Ask who decides whether it gets sold, and how that decision is written down.
What pack-out goes on each sensitive SKU? Good storage can be undone on the road. Once the carrier has the parcel it is no longer in our custody, and heat can still reach it. Ask what each warehouse would pack your oils and bottles in, and decide for yourself which sensitive SKUs should travel by ground in summer.
A probiotic that needs a cool shelf still has a lot number and an expiry date, and both have to be tracked. Getting the storage right doesn't replace that record. Our guide to lot tracking and expiration control for supplements shows how the record is made. We capture lot and expiry at receiving and rotate each product by the method agreed for it, both part of our lot and FEFO control service.
No. Most capsules and tablets keep fine at room conditions. Heat or moisture can damage probiotics, gummies and softgels. Fish oil and effervescent tablets are sensitive too. Some of those carry a label storage range tighter than room conditions. Read the storage statement on each SKU and compare it with what a warehouse can actually keep. That way you don't pay for conditions your shelf-stable stock never needed, and a sensitive product doesn't end up somewhere that can't meet its label. Our space is dry and ambient. Air-conditioning in some of our buildings is not the same as a held temperature or humidity range, so make that comparison before you send us anything.
Whatever the manufacturer's storage statement on the SKU says. For many probiotic strains that means cool or refrigerated, because heat kills the cultures faster and the CFU count on the label drops. Gummies need both heat and moisture kept down, because heat melts them together and moisture makes them clump. Ask any warehouse whether its buildings keep the range on your label, and ask for the answer in numbers. Ask too what it does with a lot that arrives heat-stressed. Someone has to decide whether that lot is sold, so find out who.
It is out of our hands. Our custody ends when the carrier takes the parcel, and heat can still reach it after that. Whether each sensitive SKU should go by ground in summer is the brand's call. What goes in the box matters too. Oils that oxidize want light-protective, leak-resistant packing, and bottles want a carton that won't crush. Ask any warehouse which pack-out it would use for each of those SKUs.
No. They are separate, and a probiotic usually needs all three. Storage conditions keep the product potent and in shape. FEFO or FIFO decides which dated lot ships first, with the expiry checked either way. Lot tracking is the record taken when stock is received. Our guides to FEFO vs FIFO and to lot tracking cover the last two.