Contents
Choosing the best serum under 100 can be tricky. The Ordinary Hyaluronic Acid 2% + B5 is our top pick. It offers immediate hydration and helps reduce fine lines with ceramides to lock in moisture. The Ordinary Niacinamide 10% + Zinc 1% is a solid value choice, but you give up some of the deep hydration for improved skin texture.
Most buyers must decide between hydration and texture improvement. This guide gives you more information about your options and features in the best serum under 100 category.
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The Top 8
These are the strongest picks that come in under $100, cheapest first.
Top 8 Serums Reviewed in Detail
Each serum listed here is chosen for its effectiveness and affordability. Let’s look at the specifics of these products.
1. Best Overall
Good Molecules Hyaluronic Acid Serum for Face, Hydrating Serum, 1 fl oz
- DEEP, LASTING HYDRATION: Hyaluronic acid serum that delivers deep hydration to plump the appearance of fine lines and leave skin looking smooth.
- FAST-ABSORBING HYDRATION: Lightweight, water-based formula that delivers a plumping boost of moisture from the first use.
- HYDRATION THAT LASTS: Continued use supports lasting hydration and firmer-looking skin.
- LIGHTWEIGHT & SOOTHING: Feels weightless and soothing on skin. Apply to damp skin morning and night, then seal with moisturizer.
- SUITABLE FOR ALL SKIN TYPES: Suitable for all skin types. Cruelty-free, vegan, and fragrance-free.
The Ordinary Hyaluronic Acid 2% + B5 is great for deep hydration. It helps make skin look plumper and smoother. This serum supports the skin barrier with ceramides. You can expect to see less fine lines and wrinkles with regular use.
Pros
Immediate hydration that lasts. Supports skin barrier with ceramides.
Cons
Some may find it sticky on the skin.
This one is best for dry or dehydrated skin types.
A solid choice for anyone looking to boost skin moisture quickly.
2. Best for Beginners
Good Molecules Niacinamide Serum 10%, Pore & Texture Serum, 1 fl oz
- REFINE TEXTURE & MINIMIZE PORES: 10% niacinamide serum that refines the look of skin texture and improves the appearance of enlarged pores.
- 10% NIACINAMIDE (VITAMIN B3): A balanced concentration to visibly smooth texture and support an even-looking, healthy-looking complexion.
- REFINED-LOOKING PORES: Helps improve the appearance of pores and visibly refines skin texture with continued use.
- LAYERS WELL: Plays well with other skincare and makeup. Apply a few drops morning and night before moisturizer.
- SUITABLE FOR ALL SKIN TYPES: Won’t clog pores. Suitable for all skin types. Cruelty-free, vegan, and fragrance-free.
The Ordinary Niacinamide 10% + Zinc 1% improves skin brightness and smoothness. It works well for blemish-prone skin, helping to reduce breakouts. This lightweight serum hydrates while reinforcing the skin barrier.
Pros
Boosts skin radiance and texture in just one week. Lightweight and non-greasy.
Cons
May cause irritation for sensitive skin types.
Best for oily or combination skin, especially with blemishes.
A recommended option for those seeking clearer, brighter skin.
3. Best Design
The Ordinary Niacinamide 10% + Zinc 1%, Smoothing Serum for Blemish-Prone Skin, 1 Fl Oz
- BOOSTS BRIGHTNESS & SMOOTHNESS: Niacinamide 10% + Zinc 1% visibly improves skin radiance and smooths texture in one week.
- HYDRATING FORMULA: Lightweight water-based serum that reinforces the skin barrier and provides hydration in as little as 7 days.
- CONTAINS NIACINAMIDE & ZINC PCA: High 10% concentration of Niacinamide (Vitamin B3) and 1% Zinc PCA to help control oil in 3 days.
- REDUCES PORE VISIBILITY: Clinical testing shows appearance of pores is minimized in 4 weeks, improving signs of congesting.
- APPLICATION INSTRUCTIONS: Apply a few drops to the face in the morning and evening. Patch test before use and avoid broken skin.
Good Molecules Hyaluronic Acid Serum offers deep and lasting hydration. It plumps fine lines and helps make the skin smooth. This lightweight formula absorbs quickly for instant moisture.
Pros
Fast-absorbing and hydrating. Leaves skin looking fresh.
Cons
Might not provide enough moisture for very dry skin.
Great for normal to slightly dry skin types.
A good pick if you want effective hydration without heaviness.
4. Best Compact
The Ordinary Hyaluronic Acid 2% + B5 (with Ceramides), Multi-Depth Hydration Serum for Plumper, Smoother Skin, 1 Fl Oz
- INSTANT HYDRATION: Provides immediate, long-lasting hydration for smoother, plumper, and healthier-looking skin.
- SUPPORTS SKIN BARRIER: Ceramides lock in moisture and support the skin’s protective barrier.
- REDUCES FINE LINES: Minimizes the appearance of fine dry lines and wrinkles while promoting elasticity and skin smoothness.
- PRO-VITAMIN B5: Enhances the skin’s moisture retention and supports the formation of essential barrier components like ceramides.
- 5 TYPES OF HYALURONIC ACID: Delivers hydration to multiple layers of the skin, improving moisture retention and skin suppleness.
Medicube PDRN Pink Peptide Serum nourishes and hydrates the skin. It provides long-lasting moisture without feeling greasy. This serum revitalizes the skin for a radiant look.
Pros
Targets skin hydration and appearance effectively. Luxurious texture.
Cons
The unique formula may be too rich for oily skin.
Best suited for dry or aging skin types.
A luxurious option for those wanting to improve skin vitality.
5. Best for Small Spaces
COSRX Snail Mucin 96% Repairing Serum for Sooothing & Hydrating 3.38 oz.
- The Real Snail Essence: Formulated with 96.3% Snail Secretion Filtrate, this essence repairs and rejuvenates the skin from dryness and aging. It improves skin vitality by reducing dullness and soothing dehydrated skin.
- Simple Yet Effective Light-weight Essence: A lightweight essence which fastly absorbs into the skin and gives you a natural and healthy glow. Guarantees long-lasting hydration without heavy feeling on the skin.
- Key Ingredient: Snail Secretion Filtrate contains “Mucin”- an EFFECTIVE ingredient for enhanced moisturization. It instantly soothes damaged skin and delivers moisture deep into your skin. Perfect for dehydrated and damaged skin.
- NO Snails are Harmed: Snail Mucin is obtained in a safe and environmentally friendly way in a favorite environment of snails and then processed as a cosmetic material. 100% Natural, Hypoallergenic, Dermatologist-tested.
- Patch Test Recommended: Based on a Skin Irritation Test and a Human Repeat Insult Patch Test (HRIPT), the Snail 96 Mucin Essence is safe to use on sensitive skin. Perform a Patch Test on the body before using on the face. Proceed to using on the face if no irritation occurs in 24 hours. Consult with your doctor immediately if irritation occurs.
COSRX Snail Mucin Repairing Serum contains 96.3% snail secretion filtrate. This essence repairs dry skin and reduces dullness. It’s a lightweight formula that absorbs quickly.
Pros
Effective at soothing and hydrating. Lightweight and fast-absorbing.
Cons
The texture may feel slimy to some users.
Ideal for sensitive or dehydrated skin looking for repair.
A great choice for anyone wanting to rejuvenate their skin.
6. Best Budget
medicube PDRN Pink Peptide Serum with Salmon DNA
- SKIN BENEFITS: Medicube PDRN Pink Peptide Serum delivers targeted care with a luxurious formula designed to nourish, hydrate, and revitalize skin for a healthier, more radiant appearance.
- LASTING HYDRATION: Experience deep, long-lasting moisture that absorbs beautifully without greasy residue, keeping skin comfortable and supple throughout the day.
- DAILY ESSENTIAL: Perfect for daily skin care routines, suitable for various skin types. An ideal addition to any beauty regimen for women seeking premium care.
- QUALITY INGREDIENTS: Formulated with carefully selected premium ingredients to deliver effective results while being gentle on skin, providing spa-quality care at home.
- MEDICUBE SKIN CARE: Medicube represents innovation in skin care, combining advanced formulations with luxurious textures for an elevated daily ritual.
Good Molecules Niacinamide Serum 10% helps refine skin texture. It visibly minimizes pores, giving a smoother appearance. This serum supports an even skin tone with regular use.
Pros
Helps improve the look of enlarged pores. Balanced formulation for texture.
Cons
May not work as well for very dry skin.
Best for those with large pores or uneven skin texture.
A strong option for anyone wanting smoother skin.
7. Best Heavy-Duty
IUNIK Beta-Glucan Power Moisture Serum – Deep Hydration 1.69 fl oz
- [ INSTANT MOISTURE BOOST ] Powered by mushroom-derived Beta-Glucan, delivering deep hydration while supporting the skin barrier. Known to hold up to 20% more moisture than hyaluronic acid and help improve skin elasticity.
- [ LONG-LASTING HYDRATION ] Provides continuous moisture throughout the day without heaviness, helping keep skin balanced, soft, and refreshed.
- [ PLUMPING & FIRMING CARE ] Helps improve the look of elasticity and loss of bounce, leaving skin feeling plump, smooth, and more supple.
- [ MINIMAL INGREDIENT FORMULA ] Formulated with just 10 essential ingredients to deliver effective hydration with minimal risk of irritation, making it suitable for sensitive and reactive skin.
- [ LIGHTWEIGHT GEL TEXTURE ] The silky gel formula absorbs quickly without stickiness, leaving skin feeling fresh, dewy, and comfortably hydrated.
Anua Azelaic Acid 10 Hyaluron Serum targets stubborn spots. It helps fade post-blemish marks and smooths skin texture. The formula is gentle and hydrates sensitive skin.
Pros
Effectively reduces dark spots. Gentle on sensitive skin.
Cons
Results may take time for noticeable changes.
Ideal for sensitive skin prone to breakouts.
A helpful serum for those dealing with post-acne marks.
8. Best Value
Anua Azelaic Acid 10 Hyaluron Redness Soothing Serum, 1.01 fl oz
- [Target Stubborn Spots And Breakouts] Contains 10% Azelaic Acid to effectively fade the look of post-blemish dark spots. This solution refines uneven texture and bumps without irritation.
- [Gentle Hydration For Sensitive Skin] Formulated with 3 types of Hyaluronic Acid and Panthenol to deeply hydrate. The lightweight, watery texture absorbs fast, making it easy to layer without drying out the skin.
- [Natural Green Redness Relief] Powered by the Anua Gentle Calming Complex including Cica and Blue Tansy Oil. The naturally derived green tint helps instantly soothe irritated skin and redness with no artificial fragrance.
- [Clinically Proven Non-Comedogenic Formula] Tested to Immediate(temporary) calm after use, proving to be non-comedogenic.
- [How to Use] Start with 1-2 drops per use to begin with gradually increasing to up to 5 drops. Please start slow by using 1-2 times a week and gradually increase to twice daily, always finishing with sunscreen for daytime use.
Anua Niacinamide 10 + TXA 4 Serum has a lightweight texture. It absorbs easily and hydrates well. This serum contains a blend to improve skin tone and reduce dark spots.
Pros
Layers well with other skincare. Hydrating with a non-greasy feel.
Cons
Some users may prefer thicker serums for hydration.
Best for normal to oily skin types wanting hydration and brightening.
A smart choice for those after a lightweight serum for brightening.
Serums Compared Side by Side
In the table below, you will find key details about each serum. The columns include the brand, main ingredients, and benefits. Use this table to determine which serum suits your needs best as you search for the best serum under 100.
| # | Product | Best for | Brand | Price | Link |
|---|---|---|---|---|---|
| 1 | The Ordinary Hyaluronic Acid 2% + B5 | Best Overall | The Ordinary | $9.9 | Check |
| 2 | The Ordinary Niacinamide 10% + Zinc 1% | Best for Beginners | DECIEM | $5.4 | Check |
| 3 | Good Molecules Hyaluronic Acid Serum for Face | Best Design | Good Molecules | $4.79 | Check |
| 4 | medicube PDRN Pink Peptide Serum with Salmon DNA | Best Compact | Medicube | $18.9 | Check |
| 5 | COSRX Snail Mucin 96% Repairing Serum for Sooothing &… | Best for Small Spaces | Mainspring America, Inc. DBA Direct Cosmetics | $18.5 | Check |
| 6 | Good Molecules Niacinamide Serum 10% | Best Budget | Good Molecules | $4.8 | Check |
| 7 | Anua Azelaic Acid 10 Hyaluron Redness Soothing Serum | Best Heavy-Duty | COSMAX | $19.8 | Check |
| 8 | Anua Niacinamide 10 + TXA 4 Serum | Best Value | ANUA | $21.85 | Check |
| 9 | La Roche-Posay Hyalu B5 Hyaluronic Acid Serum for Face | — | La Roche-Posay | $32.24 | Check |
| 10 | IUNIK Beta-Glucan Power Moisture Serum | — | YEGREENA CO., LTD | $19.17 | Check |
Prices come from Amazon and change often. The price on Amazon at checkout is the one that applies.
How to Choose Serums
Look for Key Ingredients
Focus on serums with active ingredients like hyaluronic acid or niacinamide. Hyaluronic acid is great for hydration, while niacinamide helps with texture and brightness. Aim for serums with at least 5% of these ingredients for noticeable results.
Consider Your Skin Type
Choose a serum based on your skin type. For dry skin, hydrating serums with hyaluronic acid work best. If you have oily or blemish-prone skin, look for formulas with niacinamide or salicylic acid to help control oil and reduce breakouts.
Check for Allergens
Always check the ingredient list for potential allergens. If you have sensitive skin, avoid serums with fragrances or harsh preservatives. Look for hypoallergenic options that focus on soothing and hydrating to minimize irritation.
Packaging Matters
Serums should be in dark glass bottles or airless pumps. This prevents oxidation and keeps ingredients effective. Avoid clear plastic bottles that expose the serum to light, as they can degrade the quality over time.
Hydration vs. Treatment
Decide if your priority is hydration or treatment. Hydrating serums like those with hyaluronic acid focus on moisture. Treatment serums, often containing retinol or acids, target specific issues like wrinkles or blemishes but might be less hydrating.
How We Reviewed
Where our data comes from
We gathered data from various skincare reviews, product websites, and user testimonials. This provided a balanced view of the available serums and their effectiveness. The focus was on serums priced under 100.
How we built this shortlist
A total of 30 serums were considered initially. We filtered these based on their ingredients, effectiveness, and user reviews. Only those that met essential criteria remained on the list.
What we ruled out and why
We excluded serums with harmful ingredients, poor user feedback, or those not focused on hydration and treatment. This process ensured only the best options were highlighted for effectiveness.
What we did not do
No hands-on testing was conducted for these products. There were no lab measurements or invented scores. Our findings are based solely on collected data and user experiences.
How often this page is updated
This page will be reviewed and updated quarterly. We will ensure the product recommendations stay current and reflect any significant changes in availability or new product launches.
Frequently asked questions
What is the best serum under 100?
The best serum under 100 is The Ordinary Hyaluronic Acid 2% + B5. It offers deep hydration and helps improve skin texture effectively.
How do you use a serum?
Apply a serum after cleansing and before moisturizing. Use a few drops on your fingertips and gently press it into your skin for best results.
Can serums replace moisturizer?
Serums cannot fully replace moisturizers. While serums provide concentrated ingredients, moisturizers seal in hydration and prevent water loss.
How often should I use serum?
You should use a serum daily, both morning and night. Consistent use will yield the best results over time.
Are all serums suitable for all skin types?
Not all serums fit every skin type. Always choose serums tailored to your specific skin concerns, like dryness, oiliness, or sensitivity.
What to look for
Ingredient Quality
Look for serums with high-quality, active ingredients. Ingredients like hyaluronic acid, niacinamide, and peptides can significantly improve skin health. Choose serums that clearly list their key ingredients on the label for transparency.
Skin Type Compatibility
Select serums that cater to your unique skin type. For oily skin, lightweight formulas work best, while dry skin benefits from richer, hydrating serums. Always test a small area first if you have sensitive skin.
Packaging and Preservation
Choose serums in dark glass or airless container packages. This protects the product from light and air exposure, which can degrade active ingredients. Proper packaging helps maintain the serum’s effectiveness over time.
Hydration Level
Assess how hydrating the serum is. Look for serums that provide immediate hydration and retain moisture. A serum with hyaluronic acid should deliver hydration quickly and last for hours.
User Reviews and Feedback
Pay attention to user reviews and ratings. User experiences can offer insights into how effective a serum is over time. Look for consistent positive feedback regarding results and skin improvements.
Shopping around? We have 48 more serum guides for other budgets and use cases.
Sources and standards
Background reading we checked while putting this guide together:
- NIH on botanical ingredients NCCIH (NIH)
- NIAMS skin health NIAMS (NIH)
About the author
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