INCELLDERM First Package: What Are the Booster and Serum, and Do You Need Both?
You have found the INCELLDERM First Package and noticed that it comes with two products: a booster and a serum. Before buying, a reasonable question follows: What does each bottle do, and do you really need both?
The short answer is that the First Package is presented as a two-product skincare set. The booster and serum are intended to be used as part of a routine, but a complete routine does not require every possible skincare step. Whether the set is worth adding depends on the products you already own, your skin’s tolerance and your budget.
In this guide, we explain how to think about the two steps, what to check on the label and how to avoid buying more than you need. We have not personally tested the products. This is an information-based guide, not a firsthand review.
Product information note: RIMAN’s published UK materials identify the ICD Dermatology First Package as a booster-and-serum set. We could not independently confirm the latest full ingredient lists and detailed directions for the current U.S. version. Product names, formulas, sizes and directions can differ by market or change over time. Check the package and the official information for the exact version you purchase.
In This Guide
- What is the INCELLDERM First Package?
- Booster vs. serum: the practical difference
- Do you need both products?
- How to place them in a routine
- How to check the ingredient lists
- What different skin types should consider
- How to introduce the products
- What to check before buying
- What results can you reasonably expect?
- Frequently asked questions
- Sources and related reading
What Is the INCELLDERM First Package?
The INCELLDERM—or ICD—Dermatology First Package is a skincare set associated with RIMAN. In the official UK product materials we reviewed, the package contains a Dermatology Booster and a Dermatology Serum.
A set can be convenient when you want products designed to be used within the same skincare line. It also means you should look at both products before buying. Two bottles may suit someone who enjoys layering, while another person may prefer one moisturizer and sunscreen.
Do not assume that every listing with a similar name contains exactly the same version. Older listings may include “EX” in the name, and packaging or formulas may have changed. Confirm the full name, contents and directions with the seller or on the box.
Also check whether the offer includes only the booster and serum or adds other items. A cleanser, cream or sunscreen shown in a promotional picture is not necessarily included in the price of the set.
Booster vs. Serum: What Is the Practical Difference?
In skincare, “booster” and “serum” are product names rather than precise promises about how a formula will behave. Different brands use those words differently, so the ingredient list and directions on each bottle matter more than the category name alone.
| Question | Booster | Serum |
|---|---|---|
| How to think about it | An additional skincare layer in the set | Another leave-on skincare layer in the set |
| What to check | Directions, ingredients and dispenser | Directions, ingredients and dispenser |
| Does the name prove it works better? | No | No |
| Does it replace sunscreen? | No | No |
The names alone do not establish that the booster makes the serum penetrate more deeply, that the serum is always more concentrated, or that using two products guarantees better results than using one. Those claims would require product-specific evidence.
A useful comparison starts with your own routine. If you already use a hydrating toner and a serum that you like, ask what the two new products would add. If you prefer a shorter routine, a two-step set may be more product than you want to use every day.
Do You Need Both the Booster and the Serum?
No skincare routine requires a booster and a serum simply because they are sold together. You can have a useful routine with a gentle cleanser, a moisturizer that suits your skin and suitable sun protection. Extra leave-on products are optional.
That does not mean there is no reason to try a set. You may enjoy the feel of several light layers, or the products may address preferences that your current routine does not. The key is to decide what you want each step to contribute before purchasing.
Consider these three situations:
- Your current routine feels comfortable: there may be no need to add two more products. Keep using what works unless you have a specific reason to change.
- You want a simple routine: compare the total cost of the set with the cost of one product that fills a gap in your routine.
- You enjoy layering: the set may be appealing, but add each product separately first so you can see how your skin responds.
Whether the two items are available individually depends on the seller, market and version. Check that before deciding whether to buy a set. Do not assume a seller’s bundle is the only way to build an effective routine.
How to Place the Booster and Serum in a Routine
A common way to arrange skincare is to cleanse, apply lighter leave-on products, then moisturize. If you use the First Package, check the directions on your particular box for its recommended application order and amount. We could not verify the latest detailed U.S. instructions, so the sequence below is a general example rather than a replacement for that label.
Example morning routine
- Cleanse gently, or rinse with water if that suits your skin.
- Use your selected leave-on skincare products according to their directions.
- Apply moisturizer if your skin needs it.
- Finish with broad-spectrum sunscreen with SPF 30 or higher.
For outdoor use, the American Academy of Dermatology recommends sunscreen that is also water-resistant. Reapply approximately every two hours while outdoors, or after swimming or sweating, according to the product directions. A booster or serum is not a substitute for sunscreen.
Example evening routine
- Cleanse to remove sunscreen, makeup and the day’s buildup.
- Use the leave-on product or products you have chosen to include.
- Finish with a moisturizer if needed for comfort.
If one of your products is a facial spray, read its directions and avoid spraying into your eyes or inhaling the mist. If it is a pump or dropper product, use the package instructions for the appropriate amount.
You do not need to keep layering until your skin feels sticky. If your routine pills, feels heavy or causes discomfort, reduce the number of layers and check whether the products are suitable for you.
How to Check the Booster and Serum Ingredient Lists
An ingredient name on a website is only useful when it belongs to the exact product and version you are considering. With skincare sets, ingredients may change after reformulation, and regional labels may differ.
Before using the First Package, compare the ingredient list on each bottle with any ingredients you already know you react to. Check both products: sharing a brand name does not mean the booster and serum have identical formulas.
Look at the complete list, not just the highlighted ingredient
Product pages often highlight a few attractive ingredients. The full list also tells you about the other components in the formula. If you have a known allergy or are sensitive to a particular botanical extract, the full list is more useful than the name on the front of the bottle.
Be careful with older screenshots
You may find older INCELLDERM ingredient lists or package photos online. They can be useful for understanding product history, but they do not prove that the current U.S. product has the same composition. We do not provide specific ingredient percentages here because we could not verify them for the current U.S. version.
Ask when information is missing
If a seller cannot show the exact product name, current ingredient list, directions and package size, ask before paying. That is especially helpful if you are comparing a new package with an older version or shopping from a marketplace listing.
Is the Set Suitable for Your Skin Type?
Skin type can help you decide what you prefer, but it cannot predict with certainty whether a particular formula will suit you. A product’s texture, full ingredient list and your previous reactions are all relevant.
If your skin is oily or combination
Think about how many leave-on layers feel comfortable. You may prefer a shorter routine or smaller amounts of each product. If a set adds two steps to a routine that already works, decide whether you will actually use both.
If your skin is dry
Hydrating layers may feel pleasant, but they do not automatically replace a moisturizer. If your skin still feels tight after applying your leave-on products, consider whether your moisturizer provides enough comfort.
If your skin is sensitive
Read both ingredient lists and introduce the products one at a time. “Korean skincare,” “natural” and “soothing” are not guarantees that a formula will be irritation-free for you.
If you are prone to breakouts
Adding several products at once can make it harder to understand a new reaction. Keep the rest of your routine consistent while you introduce one product. If you are treating acne, follow your clinician’s advice rather than replacing treatment with a cosmetic set.
How to Introduce the Products Without Changing Everything at Once
If you purchase the set, resist the urge to start both bottles on the same day. Introducing one product at a time gives you a clearer picture of how your skin responds.
The American Academy of Dermatology recommends testing a new skincare product on a small area, such as the underside of the arm or the bend of the elbow, twice daily for seven to 10 days. Follow the product’s directions and use the amount you would normally apply to that area.
- Choose one product and test it on a small area first.
- Keep the rest of your routine as consistent as practical.
- If your skin tolerates it, introduce it gradually into your routine.
- Test the second product separately before adding it.
If you develop redness, itching, swelling or another reaction, wash the product off and stop using it. A home test cannot guarantee that a reaction will never occur. If a reaction is severe or persistent, seek medical advice. A dermatologist can help investigate a possible contact allergy.
Avoid applying a new product to broken skin. If you already have an active rash or use prescription skincare, ask your clinician how a new product should fit into your routine.
What to Check Before Buying the First Package
- Identify the version. Check the complete product name, package photo and market. Do not assume an older “EX” listing has the same formula as another version.
- Confirm the contents. Read the listing carefully to see which items and sizes are included.
- Check both ingredient lists. Compare them with any known sensitivities and look for current, readable labels.
- Compare the full cost. Include shipping and any subscription or membership conditions, if applicable to the offer.
- Read the return policy. Check whether opened skincare can be returned and who pays for return shipping.
- Review the seller. Understand whether you are buying from a brand-operated store, an independent seller or a marketplace listing.
A set can appear attractive because the bottles are sold together. The more useful calculation is whether you expect to use both products before they expire and whether the combined cost fits your routine.
If you already own several unopened serums, waiting may be the better purchase decision. Skincare works best as a routine you can use consistently, not as a collection of steps you feel obliged to finish.
What Results Can You Reasonably Expect?
Skincare marketing often uses words such as “glow,” “radiance” and “rejuvenation.” Those words can describe a desired appearance, but they do not tell you how much improvement any one person will see.
A product that suits you may make your skin feel more comfortable or look more hydrated. Results depend on your skin, the full formula and consistent use. A cosmetic product should not be described as curing acne, eczema, rosacea or another medical condition.
Be cautious with dramatic before-and-after photographs. Lighting, makeup, camera settings and other treatments can affect appearance. A photograph alone does not establish that a particular product caused the change.
This guide does not claim that we tested the set or observed a specific result. It is intended to help you evaluate the purchase and use the information on the actual packaging more confidently.
Frequently Asked Questions
1. What comes in the INCELLDERM First Package?
The RIMAN UK materials reviewed for this article describe a First Package containing a booster and a serum. Confirm the exact contents and sizes of the version sold in your market.
2. Do I need to use both products?
No. A booster and serum are optional skincare steps. Whether you want both depends on your preferences, budget and the rest of your routine.
3. Can I use the booster without the serum?
A routine does not require a matching serum. If you already have the booster, check its directions and ingredient list, and see how your skin tolerates it. Individual availability varies by seller and market.
4. Can I use the serum without the booster?
A serum does not automatically require a matching booster. Follow the directions for your product and keep the rest of your routine suitable for your skin.
5. Which goes first: booster or serum?
Check the instructions on your exact package. We could not independently verify the latest detailed U.S. directions, and older instructions or versions may differ.
6. Do I still need a moisturizer?
Many people use a moisturizer after lighter leave-on products. Whether you need one depends on your skin and the rest of your routine. If your skin feels dry or tight, a suitable moisturizer may help.
7. Do I need sunscreen with this set?
Yes. Do not treat the booster or serum as a sunscreen. Use a suitable broad-spectrum sunscreen with SPF 30 or higher and follow its directions.
8. Is the set suitable for sensitive skin?
That depends on your individual sensitivities and the exact formula. Read each ingredient list and test new products separately before applying them more widely.
9. Can I use the products with retinol or exfoliating acids?
Your skin’s tolerance and the complete formulas matter. Add new products separately and follow the directions for any retinoid or exfoliant you already use. If irritation develops, stop the suspected product and seek professional advice when needed.
10. Are the current products the same as older versions?
Do not assume they are. Names, packaging and ingredients may change. Compare the full name and ingredient list on the version you are buying.
11. Will the set treat acne, eczema or rosacea?
Do not rely on a skincare set to treat a medical condition. A dermatologist or other qualified healthcare professional can advise on treatment and suitable skincare.
12. How can I tell whether the set is worth buying?
Consider whether you will use both bottles, whether their ingredients suit you, the total price and what you already own. If your current routine meets your needs, adding a set is optional.
Sources and Related Reading
Product information was reviewed on November 5, 2026. The RIMAN documents below are UK materials and should not be treated as confirmation of current U.S. pricing, sizes or ingredient lists.
- RIMAN UK product guide
- RIMAN UK product price list
- American Academy of Dermatology: How to test skin care products
- American Academy of Dermatology: Sunscreen FAQs
Related reading: Essence vs. Serum: K-Beauty Beginner Guide and How to Read Korean Skincare Labels .
Our take: the First Package may appeal to someone who enjoys a two-step skincare set, but both products are optional. Check the exact version and ingredient lists, then decide whether each bottle fills a useful place in your routine.
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