Summer Storage for Supplements & Cosmetics — Know the Temperature Standards Before You Choose a Warehouse
When summer arrives, shippers suddenly ask us the same thing: "Will our product be fine sitting in the warehouse like this?" Health supplements and cosmetics tend to be sensitive to temperature, so even in the same warehouse, one summer can make or break quality. Yet products are often handed over without knowing what "ambient" actually means or which temperature standard applies. RUNIC has put together the temperature standards and warehouse-selection criteria that cosmetics and supplement shippers should understand before summer hits.
First, what temperatures are "room, ambient, and refrigerated"?
We use the words often, but few people know the exact ranges. Here are the definitions under the Korea Food Code (the standard for food and health supplements).
| Category | Temperature range | Example label |
|---|---|---|
| Frozen | -18℃ or below | Products labeled for frozen storage |
| Refrigerated | 0–10℃ | Supplements and some cosmetics labeled "keep refrigerated" |
| Ambient | 15–25℃ | Products labeled "ambient storage" (a narrow range) |
| Room temp. | 1–35℃ | Products labeled "room-temperature storage" (the widest range) |
The key point is that ambient and room temperature are not the same. Ambient is a narrow 15–25℃, while room temperature is a wide 1–35℃. That makes products labeled for "ambient storage" far more sensitive. For reference, the Korean Pharmacopoeia — the standard for pharmaceuticals — defines ambient as 15–25℃ and room temperature as 1–30℃, so its upper limit for room temperature differs slightly. Either way, the storage requirement printed on the product's packaging takes precedence, so check the label's storage conditions before handing anything over.
Why summer is the problem — when the warehouse breaks the limit
The issue is summer. An ambient warehouse with no air conditioning heats up sharply inside during a heat wave. In cases where the media measured the interior of un-cooled ambient logistics warehouses in summer, the top floors were reported to reach around 35℃, with some sections rising even higher. It is a summer reality for any warehouse that isn't cooled. Two things overlap here.
- Falling out of spec — For a product labeled "ambient storage (15–25℃)," once the warehouse spends long stretches above 25℃, it falls outside the labeled storage condition. Sustained heat can lead to quality changes or a shortened shelf life.
- Humidity — Summer brings not just heat but high humidity. Moisture lifts labels, softens boxes, and where temperature swings are large it causes condensation (dew) that can affect the goods.
Products are also exposed to heat during delivery. The inside of a summer delivery vehicle and the loading-wait area run hot, so even goods kept well in the warehouse pick up a few hours of variability in transit. This stretch is hard to control completely, but raising turnover to cut exposure time lowers the risk.
Cosmetics are a little different
Rather than a uniform "store at X ℃" like food, cosmetics are usually labeled at the level of "store away from heat and direct sunlight." That said, some formulations are weak against heat. Sustained heat can break an emulsion and cause separation, shift color or fragrance, and reduce the stability of certain functional ingredients. So cosmetics, too, need storage in a cool indoor space out of direct sunlight along with summer turnover management. We've laid out the detailed standards for shelf-life and ingredient management in Cosmetics & Supplement Fulfillment — Shelf Life, FEFO, LOT.
So you have to choose the right warehouse
Not every "warehouse" is the same. You need to pick a warehouse that matches the product's storage-temperature standard.
| Warehouse type | Temperature control | Suitable products |
|---|---|---|
| Ambient warehouse | No dedicated cooling (indoor ambient) | Products labeled room-temperature or ambient (summer turnover management needed) |
| Temperature-controlled warehouse (climate-controlled) | Maintains steady temperature and humidity (industry norm roughly 15–20℃, humidity 65–70%) | Temperature-sensitive ambient products, precision or delicate goods |
| Refrigerated warehouse | Held at 0–10℃ | Supplements and cosmetics labeled "keep refrigerated" |
If a product label says "keep refrigerated," it must go in a refrigerated warehouse; if it says "avoid direct sunlight and heat" or its ingredients are delicate, consider a temperature-controlled warehouse. Ordinary room-temperature and ambient products are fine in an ambient warehouse as long as turnover is well managed.
RUNIC's storage environment — keeping goods in good shape even in summer
Storage isn't just stacking things up; it's keeping goods in good condition. RUNIC actually stores and ships not only cosmetics and health supplements but also heat-sensitive products such as chocolate. Having handled heat-sensitive categories without issue so far, here is how we manage the storage environment so that room-temperature and ambient products come through summer well.
- An orderly indoor space with no direct sunlight — Goods are stored indoors, shielded from sunlight and outside exposure, cutting off one of the main causes of heat damage, discoloration, and degradation from the start.
- Cleanliness managed by a 24-hour autonomous cleaning robot — We keep the environment dust- and contamination-free around the clock with an MT1 autonomous cleaning robot. For cosmetics that touch the skin and supplements that go in the mouth, cleanliness is trust.
- Kept fresh with fast FEFO turnover — We ship the inventory closest to its expiry date first, so goods don't linger in the warehouse. The faster the turnover, the less time products spend in summer heat.
- Inbound inspection and shelf-life management — We check quantity, condition, and expiry from the moment goods arrive, and re-verify condition when returns come back.
- Floor-level docking for fast in-and-out — With 25-ton vehicles docking directly up to the fourth floor, goods move into and out of the indoor space quickly, without waiting to load or unload.
Before summer, a checklist for shippers
Frequently asked questions
QWhat temperatures count as room, ambient, and refrigerated?
Under the Korea Food Code (the standard for food and health supplements): room temperature 1–35℃, ambient 15–25℃, refrigerated 0–10℃, and frozen -18℃ or below. The pharmaceutical standard (Korean Pharmacopoeia) defines ambient as 15–25℃ and room temperature as 1–30℃, so its upper limit for room temperature differs slightly. In practice, the product label takes precedence.
QWhy does an ambient warehouse become a problem in summer?
An ambient warehouse with no air conditioning can heat up substantially inside during a heat wave. For a product labeled ambient (15–25℃), the longer the warehouse stays above 25℃, the more likely it is to fall outside the labeled condition, and sustained heat can lead to quality changes and a shortened shelf life.
QHow do you manage the storage environment in summer?
RUNIC stores ambient and room-temperature products in an orderly indoor space shielded from direct sunlight, keeps it clean with a 24-hour autonomous cleaning robot, and uses FEFO turnover to reduce time in the heat. That said, products whose labels require refrigerated (0–10℃) or climate-controlled (temperature- and humidity-controlled) storage need matching conditions, so please let us know in advance.
QCan I entrust temperature-sensitive products too?
RUNIC already stores and ships cosmetics and health supplements alongside heat-sensitive products such as chocolate. We have hands-on experience with categories that are sensitive to heat, so you can entrust products labeled for ambient or room-temperature storage with confidence. Just let us know in advance about any products that require refrigerated or climate-controlled storage, and we'll guide you to the right approach.
QDoes raising inventory turnover in summer help?
Yes. Even for the same ambient product, the longer it sits in the warehouse, the longer it is exposed to heat. Raising turnover with FEFO — shipping the inventory closest to expiry first — reduces the chance that near-expiry or long-held stock turns into a loss over the summer.