# Good Molecules 5% Niacinamide Serum with Ectoin for oily skin

**Lovi Fit: Average fit for oily skin.**
Oily Skin Fit: High · Effectiveness: Average · Safety: High.

Page: https://lovi.care/skincare/fr/p/good-molecules/5-niacinamide-serum-with-ectoin/for/oily-skin

The Lovi Fit is the same in every country; only the stores and prices differ, and the ones here are for France.

Brand: [Good Molecules](https://lovi.care/skincare/fr/brands/good-molecules)
Category: [Serums and treatments](https://lovi.care/skincare/fr/best/serums)

This fit is calculated for the concerns frequently associated with oily skin: shine, enlarged pores, blackheads, and blemishes. For scores based on a full skin profile (12D face scan, goals, preferences), use the Lovi app.

Works for oily skin; other serums fit it better.

## Why this fit

- Offers moderate skin treatment for your oily skin, as niacinamide and ectoin improve skin tone and resilience by balancing oil production and enhancing skin barrier function.
- Glycerin provides humectant action, supporting overall hydration for oily skin, though specialized ingredients for oily shine are not present.
- The formula is safe for your oily skin, with no risks of irritation due to the absence of harsh or prohibited ingredients.

## Fit by skin type

- [Oily skin](https://lovi.care/skincare/fr/p/good-molecules/5-niacinamide-serum-with-ectoin/for/oily-skin): Average (this page)
- [Dry skin](https://lovi.care/skincare/fr/p/good-molecules/5-niacinamide-serum-with-ectoin/for/dry-skin): Average
- [Combination skin](https://lovi.care/skincare/fr/p/good-molecules/5-niacinamide-serum-with-ectoin/for/combination-skin): High
- [Sensitive skin](https://lovi.care/skincare/fr/p/good-molecules/5-niacinamide-serum-with-ectoin/for/sensitive-skin): Average
- [Acne-prone skin](https://lovi.care/skincare/fr/p/good-molecules/5-niacinamide-serum-with-ectoin/for/acne-prone-skin): Average
- [Skin with dark spots](https://lovi.care/skincare/fr/p/good-molecules/5-niacinamide-serum-with-ectoin/for/dark-spots): Average
- [Mature skin](https://lovi.care/skincare/fr/p/good-molecules/5-niacinamide-serum-with-ectoin/for/mature-skin): Average
- [Dry sensitive skin](https://lovi.care/skincare/fr/p/good-molecules/5-niacinamide-serum-with-ectoin/for/dry-sensitive-skin): Average
- [Oily acne-prone skin](https://lovi.care/skincare/fr/p/good-molecules/5-niacinamide-serum-with-ectoin/for/oily-acne-prone-skin): Average

## Key ingredients

Niacinamide, Ectoin, Glycerin

## What the research says

- A single application of a moisturizing fluid containing hyaluronic acid 1%, glycerin 5%, and Centella asiatica stem cells extract significantly increased skin hydration by 29% and reduced transepidermal water loss at 24 hours compared to baseline and an untreated control site in twenty healthy women. ([Clinical, Cosmetic and Investigational Dermatology, 2017](https://pubmed.ncbi.nlm.nih.gov/28860834/))
- Topical post-laser application of human adipocyte-derived mesenchymal stem cell media combined with niacinamide significantly improved wrinkle index, melanin index, patient satisfaction, and investigator esthetic improvement scores compared to vehicle cream in patients with aging skin. ([Journal of Cosmetic Dermatology, 2021](https://pubmed.ncbi.nlm.nih.gov/33103316/))
- Topical nicotinamide prevented solar-simulated UV-induced immunosuppression in healthy volunteers, and men experienced immunosuppression at solar-simulated UV doses three times lower than those required for women. ([The Journal of Investigative Dermatology, 2008](https://pubmed.ncbi.nlm.nih.gov/17882270/))
- Topical 5% niacinamide applied twice daily for 12 weeks reduced fine lines and wrinkles, hyperpigmented spots, red blotchiness, and skin sallowness, and improved skin elasticity compared to vehicle control in 50 female white subjects with facial photoaging. ([Dermatologic Surgery, 2005](https://pubmed.ncbi.nlm.nih.gov/16029679/))
- Combining ectoine and mannitol with UV filters significantly improved protection of squalene oxidation, catalase activity, and trans-UCA compared to UV filters alone in 10 subjects on irradiated areas. ([Journal of Cosmetic Dermatology, 2024](https://pubmed.ncbi.nlm.nih.gov/37539499/))
- Topical 7% ectoine during serial 1064-nm Nd:YAG laser therapy produced a greater reduction in skin erythema, improved stratum corneum hydration, reduced transepidermal water loss, and decreased low-echogenic pixels in thirty participants compared to a vehicle control. ([Biomedicines, 2026](https://pubmed.ncbi.nlm.nih.gov/42792808/))
- Regular application of a novel anti-ageing cream containing hyaluronic acid, ectoin, and botanical actives significantly reduced wrinkle depth and length in the periorbital area while demonstrating very good skin tolerance. ([Polymers, 2023](https://pubmed.ncbi.nlm.nih.gov/37896378/))
- The emollient V0034CR significantly reduced TEWL compared to vehicle and vehicle plus glycerol, and significantly increased corneometry scores compared to vehicle and vehicle plus petrolatum in healthy volunteers with dry skin, demonstrating combined barrier function improvement from petrolatum and hydration improvement from glycerol. ([Journal of Cosmetic Dermatology, 2020](https://pubmed.ncbi.nlm.nih.gov/31532576/))
- Ten days of treatment with a cream containing 20% glycerin significantly increased skin hydration measured by corneometer values in 17 healthy volunteers compared to a placebo cream, but showed no influence on transepidermal water loss or skin sensitivity to an irritating surfactant. ([International Journal of Cosmetic Science, 2001](https://pubmed.ncbi.nlm.nih.gov/18498456/))
- Niacinamide/glycerin body moisturizers provided better rapid and prolonged improvement of cosmetic xerosis through functional improvement of stratum corneum barrier function compared to no treatment and conventional moisturizers in female subjects. ([Journal of Drugs in Dermatology, 2012](https://pubmed.ncbi.nlm.nih.gov/22206073/))

## Why other serums fit oily skin better

- A panthenol-enriched mask improved skin hydration, regulated sebum, and reduced redness and TEWL across dry sensitive, oily sensitive, and oily acne skin subgroups with excellent tolerance and no adverse reactions. ([Journal of Cosmetic Dermatology, 2024](https://pubmed.ncbi.nlm.nih.gov/38366684/))
- Niacinamide and ferulic acid incorporated in a stable multiple emulsion successfully reduced melanin, sebum, and skin erythema while improving skin elasticity and hydration in human skin compared to a placebo. ([BioMed Research International, 2022](https://pubmed.ncbi.nlm.nih.gov/35342760/))

## What reviewers say

Based on limited data, this serum is highly regarded as a gentle and hydrating option, particularly suitable for sensitive or reactive skin. Users frequently report improvements in skin texture, a reduction in redness, and minimized pores. The inclusion of Ectoin is noted for providing a plump and hydrated feel without the irritation sometimes associated with higher concentrations of niacinamide.

- Liked: Lightweight texture (mostly mentioned)
- Liked: Gentle & non-irritating (often mentioned)
- Liked: Hydrating & plumping (often mentioned)
- Liked: Improves texture & pores (sometimes noted)
- Disliked: Slight stickiness (sometimes noted)
- Disliked: Breakouts (rarely noted)
- Disliked: Immediate irritation (rarely noted)
- Disliked: Slow results (rarely noted)

## How to apply

- Use this serum in your PM routine. Start by applying it 3 times a week and build up to daily use if your skin tolerates it well.
- Apply the serum after cleansing and toning, but right before your moisturizer for the best results.
- Gently press 2-3 drops of the serum into your skin. Let it absorb ⏱ for a minute before applying the next product.
- Apply the serum on clean and dry skin since your skin is not sensitive and you want to target oily shine. This helps control excess oil throughout the night.
- Avoid the delicate eye area and do a patch test before using the serum for the very first time.
- Video: https://storage.pora.ai/c879dda8655a61c19d3d8c9ebad6b06d.mp4

## Questions and answers

### How well does the Good Molecules 5% Niacinamide Serum work for oily skin?

This serum works moderately well for oily skin, helping balance oil production and improve skin tone with niacinamide and ectoin. A product for oily skin of this type needs ingredients that control excess oil and shine, manage pores, and strengthen the skin barrier without clogging pores.

### Which ingredients make this serum a good fit for oily skin?

Niacinamide and ectoin make this serum a fit by balancing oil production and enhancing skin barrier function, while glycerin provides hydration. A product of this type for oily skin needs targeted ingredients that control excess sebum and reduce shine, such as zinc PCA or ferulic acid, along with soothing extracts.
Sources: [Clinical, Cosmetic and Investigational Dermatology, 2017](https://pubmed.ncbi.nlm.nih.gov/28860834/)

### What does Niacinamide do for oily skin?

Niacinamide helps balance oily skin by significantly reducing excess oil production and shine. It is well tolerated and may improve skin texture without clogging pores.
Sources: [Journal of Cosmetic and Laser Therapy, 2006](https://pubmed.ncbi.nlm.nih.gov/16766489/), [Antioxidants, 2021](https://pubmed.ncbi.nlm.nih.gov/34439563/)

### What does Ectoin do for oily skin?

Ectoin helps protect oily skin from irritation and environmental stress while keeping it calm and balanced. It acts as a cell protector that strengthens the skin barrier and keeps moisture locked in without feeling heavy. Oily skin of this type needs lightweight hydrators and antioxidants like ectoine to stay smooth and calm.
Sources: [Clinics in Dermatology, 2008](https://pubmed.ncbi.nlm.nih.gov/18691511/), [Arhiv Za Higijenu Rada I Toksikologiju, 2016](https://pubmed.ncbi.nlm.nih.gov/28033102/)

### Where does this serum go in a skincare routine for oily skin?

This serum goes in the evening routine after cleansing and toning, and before moisturizing. Oily skin needs targeted ingredients that help control shine and balance oil production while keeping the skin hydrated.
Sources: [International Journal of Cosmetic Science, 2020](https://pubmed.ncbi.nlm.nih.gov/31461548/)

### Can I use this serum with retinol, and in what order?

Yes, you can use this serum with retinol by applying the serum first and following it with your retinol product. This helps keep your skin calm and balanced while using a stronger active ingredient.

### How often should I use this serum?

This serum works best in your evening routine, as treatments fit simply and safely into nighttime use. Because it offers a moderate fit for oily skin, a product of this type needs specialized ingredients for oily shine to manage oil even better.

### Can this serum clog pores, cause breakouts or purging for oily skin?

This serum is unlikely to cause breakouts or clog pores for your oily skin, as it has a very low risk of breakouts and no harsh ingredients that would irritate you. However, because it lacks specialized ingredients to control oily shine, an oily skin type needs mattifying ingredients or oil-absorbing minerals to better manage excess oil.

### Is this serum fragrance-free and alcohol-free?

Yes, it has no fragrance and no drying alcohol.

## Alternatives for oily skin

- [Beauty of Joseon Propolis + Niacinamide Glow Serum](https://lovi.care/skincare/fr/p/beauty-of-joseon/propolis-niacinamide-glow-serum/for/oily-skin) — Superior fit — €18.25 at Amazon
- [Neogen Dermalogy Real Niacinamide 15% Firming Serum](https://lovi.care/skincare/fr/p/neogen-dermalogy/real-niacinamide-15-firming-serum/for/oily-skin) — Superior fit — €35.99 at Amazon
- [SkinCeuticals C E Ferulic](https://lovi.care/skincare/fr/p/skinceuticals/c-e-ferulic/for/oily-skin) — High fit — €139.99 at Amazon

## Pairs well with

- Cleanser: [CeraVe Foaming Facial Cleanser](https://lovi.care/skincare/fr/p/cerave/foaming-facial-cleanser/for/oily-skin) — Superior fit — €11.35 at Amazon
- Hydrating Toner: [SOME BY MI Snail Truecica Miracle Repair Toner](https://lovi.care/skincare/fr/p/some-by-mi/snail-truecica-miracle-repair-toner/for/oily-skin) — Superior fit — €19.99 at Amazon
- Moisturizer: [COSRX Oil-Free Ultra-Moisturizing Lotion with Birch Sap](https://lovi.care/skincare/fr/p/cosrx/oil-free-ultra-moisturizing-lotion-with-birch-sap/for/oily-skin) — Superior fit — €17.47 at Amazon

## Where to buy

No store in France has a checked price for this product, so the page shows none.

## Ingredients

Water, Niacinamide, Glycerin, Propanediol, Ectoin, 1,2-Hexanediol, Caprylyl Glycol, Xanthan Gum, Ethylhexylglycerin
## About the Lovi Fit

Lovi: Unbiased, science-based skincare AI trained on real user outcomes.

Lovi calculates every fit score from the full ingredient list with brand-independent rules its dermatologists and cosmetic chemists build and review, and personalizes every pick with AI trained on the real results of millions of users. Lovi trains its fit score models on a proprietary dataset built from more than 10,000 expert-labeled products and more than 100,000 simulated examples, following an internally consistent methodology presented at Cosmoprof, AMWC, and Skin of Color Update. Levels from best to worst: Superior, High, Average, Low, Caution, Warning.

Behind this fit score: Nadia Kapleva, MS (Co-founder, Medical Director); Alexey Shagraev, PhD (Co-founder, CEO and CTO); Dr. Sofía Perea Pérez, MD, MSc (Medical Board); Aishani Shah, MD (Medical Board); Asya Zubkova, MS (Medical Board); Hanna Kurets, MD (Medical Board, Medical Advisor); Elina Nazarenko, MD (Medical Board); Victoria Derkova, MS (Medical Board).

Page built Nov 8, 2026.

More from Lovi: https://lovi.care/skincare/llms.txt

## This page in other countries

- United States: https://lovi.care/skincare/p/good-molecules/5-niacinamide-serum-with-ectoin/for/oily-skin
- United Kingdom: https://lovi.care/skincare/uk/p/good-molecules/5-niacinamide-serum-with-ectoin/for/oily-skin
- Ireland: https://lovi.care/skincare/ie/p/good-molecules/5-niacinamide-serum-with-ectoin/for/oily-skin
- Germany: https://lovi.care/skincare/de/p/good-molecules/5-niacinamide-serum-with-ectoin/for/oily-skin
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