# numbuzin No.5 Vitamin Boosting Essential Toner for sensitive skin

**Lovi Fit: High fit for sensitive skin.**
Normal Skin Fit: Superior · Effectiveness: High · Safety: Excellent.

Page: https://lovi.care/skincare/sg/p/numbuzin/no-5-vitamin-boosting-essential-toner/for/sensitive-skin

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

Brand: [numbuzin](https://lovi.care/skincare/sg/brands/numbuzin)
Category: [Toners](https://lovi.care/skincare/sg/best/toners)

This fit is calculated for the concerns frequently associated with sensitive skin: redness, stinging, and reactions to new products. For scores based on a full skin profile (12D face scan, goals, preferences), use the Lovi app.

A great choice for sensitive skin; a few toners fit it even better.

## Why this fit

- This toner offers moderate benefits for your redness and irritation, as niacinamide and bisabolol work to soothe inflammation, while glycerin and panthenol provide excellent hydration for your normal skin. The 3-O-ethyl ascorbic acid also offers antioxidant activity, which is beneficial for overall skin health.
- The formulation is safe for your sensitive skin, containing soothing ingredients like bisabolol and panthenol and lacking harsh or prohibited substances.
- Overall, the product is safe and functional, providing good hydration and some relevant benefits for your skin concerns.

## Fit by skin type

- [Oily skin](https://lovi.care/skincare/sg/p/numbuzin/no-5-vitamin-boosting-essential-toner/for/oily-skin): Superior
- [Dry skin](https://lovi.care/skincare/sg/p/numbuzin/no-5-vitamin-boosting-essential-toner/for/dry-skin): Superior
- [Combination skin](https://lovi.care/skincare/sg/p/numbuzin/no-5-vitamin-boosting-essential-toner/for/combination-skin): High
- [Sensitive skin](https://lovi.care/skincare/sg/p/numbuzin/no-5-vitamin-boosting-essential-toner/for/sensitive-skin): High (this page)
- [Acne-prone skin](https://lovi.care/skincare/sg/p/numbuzin/no-5-vitamin-boosting-essential-toner/for/acne-prone-skin): Superior
- [Skin with dark spots](https://lovi.care/skincare/sg/p/numbuzin/no-5-vitamin-boosting-essential-toner/for/dark-spots): High
- [Mature skin](https://lovi.care/skincare/sg/p/numbuzin/no-5-vitamin-boosting-essential-toner/for/mature-skin): High
- [Dry sensitive skin](https://lovi.care/skincare/sg/p/numbuzin/no-5-vitamin-boosting-essential-toner/for/dry-sensitive-skin): High
- [Oily acne-prone skin](https://lovi.care/skincare/sg/p/numbuzin/no-5-vitamin-boosting-essential-toner/for/oily-acne-prone-skin): Superior

## Key ingredients

Niacinamide, Ascorbic Acid, Glutathione, Madecassoside, Panthenol

## What the research says

- Topical dexpanthenol acts as a moisturizer, improves stratum corneum hydration, accelerates wound healing and epidermal regeneration, reduces erythema, and improves symptoms of skin irritation compared to vehicle or no pretreatment. ([American Journal of Clinical Dermatology, 2002](https://pubmed.ncbi.nlm.nih.gov/12113650/))
- 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/))
- A panthenol-enriched mask significantly decreased erythema and hyperpigmentation, increased sebum and stratum corneum moisture, and reduced transepidermal water loss compared to a saline dressing in 60 subjects undergoing facial laser treatment. ([Journal of Cosmetic Dermatology, 2025](https://pubmed.ncbi.nlm.nih.gov/40613435/))
- Cosmetic formulations containing 5% Centella asiatica extract showed the best efficacy in improving skin moisture and decreasing transepidermal water loss, while also exhibiting antiinflammatory properties in 25 volunteers compared to baseline measurements. ([Indian Journal of Pharmaceutical Sciences, 2016](https://pubmed.ncbi.nlm.nih.gov/27168678/))
- 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/))
- Topical application of 5% vitamin C cream significantly improved global clinical scores, increased skin microrelief density, and induced elastic tissue repair in photoaged skin compared to excipient control in healthy female volunteers. ([Experimental Dermatology, 2003](https://pubmed.ncbi.nlm.nih.gov/12823436/))
- Ascorbic acid 2-glucoside gel significantly reduced gingival melanin pigmentation after 4 weeks compared to placebo in 73 subjects with symmetric pigmentation. ([Journal of Periodontology, 2009](https://pubmed.ncbi.nlm.nih.gov/19186973/))
- Topical application of VC-IP cream twice daily for 8 weeks reduces periorbital wrinkles in female subjects compared to a placebo cream. ([Journal of Cosmetic Dermatology, 2022](https://pubmed.ncbi.nlm.nih.gov/34910367/))
- Glutathione amino acid precursors effectively increase cellular glutathione levels, reducing oxidative stress, ATP depletion, and DNA damage in human keratinocytes, clinical subjects, and ex vivo skin compared to controls. ([Journal of the European Academy of Dermatology and Venereology, 2024](https://pubmed.ncbi.nlm.nih.gov/38189670/))
- Topical oxidized glutathione significantly decreases the skin melanin index and improves moisture content, smoothness, wrinkle formation, and elasticity compared to placebo in healthy women. ([Clinical, Cosmetic and Investigational Dermatology, 2014](https://pubmed.ncbi.nlm.nih.gov/25378941/))
- Topical glutathione improves hyperpigmentation, reduces ultraviolet-induced erythema and wrinkles, decreases transepidermal water loss, and enhances antioxidant capacity. ([The Journal of Clinical and Aesthetic Dermatology, 2025](https://pubmed.ncbi.nlm.nih.gov/41416233/))
- Topical application of 0.05% w/w ECa 233 gel reduced erythema index by 0.03 U and improved early crusting and general wound appearance compared to placebo in thirty individuals undergoing facial laser resurfacing. ([Journal of Alternative and Complementary Medicine, 2020](https://pubmed.ncbi.nlm.nih.gov/32310680/))
- Moisturizer containing 5% panthenol, madecassoside, and copper-zinc-manganese decreased adverse reactions and downtime after ablative fractional carbon dioxide laser resurfacing with comparable efficacy to 0.02% triamcinolone acetonide cream in 20 subjects. ([Journal of Cosmetic Dermatology, 2019](https://pubmed.ncbi.nlm.nih.gov/30945430/))
- Topical treatment with 5% vitamin C and 0.1% madecassoside significantly improved clinical scores for wrinkles, suppleness, firmness, roughness, and skin hydration, along with functional and structural remodeling of the elastic fiber network in 20 female volunteers with photoaged skin after 6 months compared to baseline. ([Experimental Dermatology, 2008](https://pubmed.ncbi.nlm.nih.gov/18503551/))
- Topical dexpanthenol formulated in lipophilic vehicles improved stratum corneum hydration and reduced transepidermal water loss compared to vehicle control in humans. ([Arzneimittel-Forschung, 2000](https://pubmed.ncbi.nlm.nih.gov/10965426/))
- Hyaluronic acid, hyaluronic acid plus dexpanthenol, and isotonic saline nasal sprays all significantly improved dry nose symptoms over four weeks in 240 patients, with hyaluronic acid plus dexpanthenol providing superior nasal moisturisation compared to the other two. ([Auris, Nasus, Larynx, 2020](https://pubmed.ncbi.nlm.nih.gov/32067777/))
- A combination serum containing galactomyces ferment filtrate, dexpanthenol, and Centella asiatica effectively treated post-acne hyperpigmentation in subjects with colored skin by significantly increasing lightness scores in Fitzpatrick skin type V and reducing the melanin index in Fitzpatrick skin type IV compared to placebo. ([Skinmed, 2021](https://pubmed.ncbi.nlm.nih.gov/33938432/))

## What reviewers say

Based on a very large amount of data, users frequently praise this toner for its essence-like, viscous texture that deeply hydrates and creates an immediate "glass skin" glow, making it ideal for dull or dehydrated skin. While many report a more radiant complexion over time, significant fading of hyperpigmentation and dark spots is often described as a slow process requiring consistent, long-term use.

- Liked: Deep hydration (mostly mentioned)
- Liked: Essence-like texture (often mentioned)
- Liked: Immediate glow (often mentioned)
- Liked: Brightening ingredients (sometimes noted)
- Disliked: Slow brightening results (sometimes noted)
- Disliked: Potential irritation (rarely noted)
- Disliked: Sticky finish (rarely noted)

## How to apply

- Use your hydrating toner in both your AM and PM routines. Start 3 times per week and move to daily use if your skin feels good.
- Apply your hydrating toner right after cleansing and before putting on your moisturizer or SPF.
- Gently press 2-3 drops of the hydrating toner into your skin and let it absorb for a minute before the next step.
- For sensitive skin, apply the hydrating toner on dry skin to keep it calm and comfortable.
- Always do a patch test before your first use and avoid the sensitive eye area.
- Video: https://storage.pora.ai/25abe7eb181ba53153fd15de2058c2a9.mp4

## Questions and answers

### What makes Numbuzin No.5 Vitamin Boosting Essential Toner a great fit for sensitive skin?

This toner is a great fit because niacinamide and bisabolol help soothe redness and irritation, while glycerin and panthenol provide deep hydration. It also features a very safe formulation that is unlikely to trigger sensitive skin.
Sources: [American Journal of Clinical Dermatology, 2002](https://pubmed.ncbi.nlm.nih.gov/12113650/)

### Which ingredients make this toner a good fit for sensitive skin?

Niacinamide, panthenol, bisabolol, and madecassoside make this toner a great fit by soothing redness and irritation while being gentle on sensitive skin. Glycerin also helps by keeping your skin well hydrated.
Sources: [American Journal of Clinical Dermatology, 2002](https://pubmed.ncbi.nlm.nih.gov/12113650/), [Journal of Cosmetic Dermatology, 2025](https://pubmed.ncbi.nlm.nih.gov/40613435/)

### What does Niacinamide do for sensitive skin?

Niacinamide helps calm sensitive skin by strengthening the skin barrier and reducing redness and irritation. It is very well tolerated and may improve overall comfort and resilience with regular use.
Sources: [Cutis, 2005](https://pubmed.ncbi.nlm.nih.gov/16209160/), [Journal of Cosmetic Dermatology, 2004](https://pubmed.ncbi.nlm.nih.gov/17147561/)

### What does Vitamin C do for sensitive skin?

Vitamin C helps brighten skin, smooth out fine lines, and fade dark spots. Clinical studies show it is generally safe and well-tolerated when improving overall skin quality.
Sources: [Journal of Cosmetic Dermatology, 2020](https://pubmed.ncbi.nlm.nih.gov/31975502/), [Journal of Cosmetic Dermatology, 2023](https://pubmed.ncbi.nlm.nih.gov/37128827/)

### Where does this toner go in a skincare routine for sensitive skin?

This toner goes right after cleansing in both your morning and evening skincare routines to help calm redness and provide deep hydration. Its gentle formulation containing panthenol and bisabolol has a safe profile that is unlikely to irritate sensitive skin.
Sources: [American Journal of Clinical Dermatology, 2002](https://pubmed.ncbi.nlm.nih.gov/12113650/), [Clinical, Cosmetic and Investigational Dermatology, 2017](https://pubmed.ncbi.nlm.nih.gov/28860834/)

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

You can use this toner with retinol by applying the toner first to hydrate and soothe your skin, and then following with your retinol. This formulation is safe and well-tolerated, helping to keep sensitive skin calm while you use stronger treatments.
Sources: [Cutis, 2006](https://pubmed.ncbi.nlm.nih.gov/17121065/), [American Journal of Clinical Dermatology, 2002](https://pubmed.ncbi.nlm.nih.gov/12113650/)

### How often should I use this toner?

You can use this toner daily in both your morning and evening routines because its soothing ingredients like panthenol and bisabolol are gentle and safe for sensitive skin. Regular use helps calm redness and keeps your skin feeling soft and well-hydrated.
Sources: [American Journal of Clinical Dermatology, 2002](https://pubmed.ncbi.nlm.nih.gov/12113650/)

### Can this toner clog pores, cause breakouts or purging for sensitive skin?

This toner is unlikely to clog pores or cause breakouts for your sensitive skin, as it has a safe formulation with a low risk of irritation and features soothing ingredients like panthenol. It does not contain active ingredients that speed up skin shedding, so it will not cause purging.
Sources: [American Journal of Clinical Dermatology, 2002](https://pubmed.ncbi.nlm.nih.gov/12113650/), [Journal of Cosmetic Dermatology, 2025](https://pubmed.ncbi.nlm.nih.gov/40613435/)

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

Yes, it has no fragrance and no drying alcohol.

## Alternatives for sensitive skin

- [Isntree Hyaluronic Acid Toner](https://lovi.care/skincare/sg/p/isntree/hyaluronic-acid-toner/for/sensitive-skin) — Superior fit — S$28.96 at Amazon
- [SNP Prep Peptaronic Toner](https://lovi.care/skincare/sg/p/snp-prep/peptaronic-toner/for/sensitive-skin) — Superior fit — S$28.32 at Amazon
- [Clarins Hydrating Toning Lotion](https://lovi.care/skincare/sg/p/clarins/hydrating-toning-lotion/for/sensitive-skin) — High fit — S$42.13 at Amazon

## Pairs well with

- Cleanser: [Fresh Soy Face Cleanser](https://lovi.care/skincare/sg/p/fresh/soy-face-cleanser/for/sensitive-skin) — Superior fit — S$30.00 at Amazon
- Moisturizer with Sun Protection: [ISDIN Eryfotona Actinica SPF 50+](https://lovi.care/skincare/sg/p/isdin/eryfotona-actinica-spf-50/for/sensitive-skin) — Superior fit — S$110.01 at Amazon
- Pre-Cleanser: [MISSHA Ultra Hyalon Cleansing Cream](https://lovi.care/skincare/sg/p/missha/ultra-hyalon-cleansing-cream/for/sensitive-skin) — Superior fit — S$39.68 at Amazon

## Where to buy

- YesStyle: S$19.78 (https://www.yesstyle.com/en/numbuzin-no-5-glutathione-vitamin-boosting-essential-toner-200ml/info.html/pid.1137741104?curr=SGD&rco=SG)
Prices checked 13 Oct 2026.

## Ingredients

Water, Dipropylene Glycol, Glycerin, Niacinamide, 1,2-Hexanediol, Butylene Glycol, Polyglycerin-3, Hippophae Rhamnoides Water, Acrylates C10-30 Alkyl Acrylate Crosspolymer, Tromethamine, Erythritol, Pentylene Glycol, 3-O-Ethyl Ascorbic Acid, Ethylhexylglycerin, Polyglyceryl-4 Caprate, Adenosine, Glutathione, Hydrogenated Lecithin, Disodium Edta, Madecassoside, Coptis Japonica Root Extract, Decyl Glucoside, Caprylyl Glycol, Ceramide Np, Ascorbic Acid, Bisabolol, Panthenol, Tocopherol, Arbutin, Acetyl Hexapeptide-8, Hexapeptide-9, Nonapeptide-1, Palmitoyl Pentapeptide-4, Palmitoyl Tripeptide-1, Palmitoyl Tetrapeptide-7
## 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/numbuzin/no-5-vitamin-boosting-essential-toner/for/sensitive-skin
- United Kingdom: https://lovi.care/skincare/uk/p/numbuzin/no-5-vitamin-boosting-essential-toner/for/sensitive-skin
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- Singapore: https://lovi.care/skincare/sg/p/numbuzin/no-5-vitamin-boosting-essential-toner/for/sensitive-skin (this page)
- Saudi Arabia: https://lovi.care/skincare/sa/p/numbuzin/no-5-vitamin-boosting-essential-toner/for/sensitive-skin
- United Arab Emirates: https://lovi.care/skincare/ae/p/numbuzin/no-5-vitamin-boosting-essential-toner/for/sensitive-skin