A powerhouse 10% Vitamin C serum formulated to visibly brighten skin, even tone, and reduce the look of dark spots. Now upgraded with an odour-neutralising complex, it delivers all the glow in a scent-neutral formula.
A powerhouse 10% Vitamin C serum formulated to visibly brighten skin, even tone, and reduce the look of dark spots. Now upgraded with an odour-neutralising complex, it delivers all the glow in a scent-neutral formula.
Regular price
£36.00
Sale price
£36.00
Unit price
/ per
10% Vitamin C
Brightens skin + targets uneven tone
After cleansing, apply 1–2 pumps to the face and neck, avoiding the eye area. Gently press or smooth into skin until absorbed.
Follow with a hydrating serum and moisturiser to lock in benefits. Always finish with broad-spectrum SPF as your final step to protect and maintain results.
If you're new to Vitamin C, start with every other morning. Once your skin adjusts, you can use it daily.
Patch Test:
As with any skincare, we recommend patch testing before first use. Apply a small amount to your neck or inner wrist and wait 24 hours.
Avoid using on broken, exfoliated, or irritated skin. If you have sensitive or reactive skin, patch testing is especially important.
Start with 2–3 uses per week and increase gradually as your skin builds tolerance. Discontinue use if any sensitivity occurs.
Recycling:
Please rinse the bottle and remove the label before recycling. The cap is not recyclable at this time.
Three clinically studied forms of Vitamin C—3-O-Ethyl Ascorbic Acid, Ascorbyl Tetraisopalmitate, and Sodium Ascorbyl Phosphate—work together to brighten, even tone, and protect against early signs of ageing.
Ferulic Acid
A powerful antioxidant that stabilises Vitamin C and defends against environmental stressors like UV and pollution.
Niacinamide
Soothes visible redness, refines texture, and supports the skin barrier—ideal for daily use, even on sensitive skin.
Glycerin + Plant Oils
Hydrating and softening ingredients like Glycerin, Sweet Cherry Oil, and Grape Seed Oil help balance the skin and enhance radiance without heaviness.
Start your day with hydration and glow. Pair our Hyaluronic Acid Serum with the Triple Vitamin C Serum to plump, brighten, and protect your skin from daily stressors. Save 15% when you bundle.
Can’t find what you’re looking for? Reach out to us at
hello@duogenskin.co.uk — we’re here to help!
What changed in the updated Triple Vitamin C Serum?
We’ve listened to your feedback. The updated formula now includes an odour-neutralising agent to address previous scent concerns. The formula has been streamlined, and the packaging is now upgraded with a lockable pump for consistent and travel-friendly dispensing.
What stayed the same?
The results you love are unchanged. Our core actives—Triple Vitamin C, Ferulic Acid, Niacinamide, and Glycerin—are all still here, working together to brighten, protect, and smooth your skin. It’s still the same lightweight, fast-absorbing formula designed for visible results.
Why does this serum use 3 forms of Vitamin C?
Each form has unique benefits and absorption rates. Using three ensures broader coverage: improved brightness, enhanced stability, and deeper antioxidant protection for all skin types.
How do I prevent my serum from oxidising?
We use amber glass packaging to protect against light exposure. Store in a cool, dry place, out of direct sunlight, and always close the cap to maintain potency.
Can I use this serum with other actives?
Yes—this formula layers well with hydrating serums like hyaluronic acid and barrier-strengthening moisturisers. Avoid layering with strong exfoliating acids or retinol in the same routine to reduce the risk of irritation.
Customer Reviews
Overall rating: 4.2 / 5 from 309 reviews.
I love Duogen products. I use 4 of them in the morning and Triple Vitamin C serum is one of them. It is a light serum that helps hydrate too. I’m pleased with my morning and bedtime routines and with the results. I celebrated my 80th birthday last autumn and I’m happy to continue reordering!
Store owner replied:
Hello Margaret, thank you for your wonderful review of the Triple Vitamin C Serum. It’s so lovely to hear that DuoGen has become part of both your morning and bedtime routines, and that you’re enjoying the results from using the products consistently. If you ever need anything, you can reach us at hello@duogenskin.co.uk. The DuoGen Team
I love this duo! I’m new to this brand but, after doing some research, I thought I’d try it. My over 60 skin is glad I did, it beats most other brands I’ve tried. I leave a minute or two between applications of each product to allow them to sink in individually while brushing my teeth etc. and then follow with the day cream. I will be buying them again.
Store owner replied:
Hello Elizabeth, thank you for your glowing review of The Morning Duo! We’re so glad to hear it’s been a positive addition to your routine and that your skin is feeling the benefits. If you ever have any questions, feel free to reach out to us at hello@duogenskin.co.uk.
The DuoGen Team
I have been using the duo pack am and pm everyday for over two months now and definitely noticed a difference on my skin. It is clearer and brighter, and I have less dryness, which is something I struggle with due to use of prescription strength Tretinoin. In the morning after a gentle cleanse I start with a couple of pumps of VitC followed by a pump of hyaluronic acid serum, then my daily moisturiser and finally the SPF50. In the evenings, I alternate the use of the duo with my Tretinoin. I am 47 years old and believe less is more, so don't wear much make up, so when I do is just some bronzer and mascara, with a bit of lip cream. Good skin is the best foundation, and I intend to continue using Habitual Duo in my daily routine. Highly recommend it.
Store owner replied:
Hello Yeliz, thank you so much for sharing your experience with The Morning Duo! We’re thrilled to hear it’s made a positive difference. It’s inspiring to hear about your dedication to a minimalist approach to skincare—good skin truly is the best foundation, and we’re honoured to be part of your daily routine. If you have any more feedback or need any support, please don’t hesitate to reach out at hello@duogenskin.co.uk. We’re here to help!
The DuoGen Team
I love this skincare brand so much 💖
I started using it around 6 months ago and it makes my skin look and feel amazing.
I have been using the triple vitamin C serum since a few months again now 2 times a day, and it has been great for my skin, I see a glow & better complexion, pimples healing better if I get any. I haven’t tried any other Vit C since I have used DuoGen [Formerly Habitual Skin] because its just that good & I’m not sure how other brands’ products will sit on my skin.
I don’t have the best skin, I didn’t look after it when I was younger, I have large pores, and old acne scars, but this stud is fab, makes my skin feel the best it has in years!!
DuoGen [Formerly Habitual Skin] Triple Vitamin C Serum feels exceptionally great on my skin. I use it daily for my morning routine. I’m happy that I came across there products. I highly recommend this product. You won’t be disappointed.
I would recommend this vitamin C serum to anyone who likes there skin to flow!
It sinks into the skin like velvet and makes my skin feel very smooth I will definately but it again as it is now part of my skincare routine 😊
I tried this vitamin C last year and liked it ok. I then tried a cheaper brand of Vitamin C serum and noticed a big negative difference as it was of a very thin texture - just like water! I've now gone back to the DuoGen [Formerly Habitual Skin] brand Vitamin C and will continue using it as it did make a difference to my skin. Would highly recommend it
I love my morning duo! I am 81 years old, so realistically do not expect this to rid me of my wrinkles, but I will explain it this way.
Everyone has experienced a ‘good hair day’ which makes you feel confident and attractive and lifts your spirits, no matter what your age. Well, I use this night and morning (my choice) but after using it, and then applying my make up, I always experience a ‘good face day’!
As I’m Turing 57 in January and ex qualified personal trainer nutritionist I’ve always looked after myself both body and soul along with taking care of my skin for obvious reasons. Tried a number of vitamin C products over the years most of which are either too strong or not natural despite claims.
This works perfectly as it’s both light and clearly doesn’t irritate my skin.
Use mainly at night 2-3 times a week.
Quality product at a good price.
Love this combination. The vitamin c
Smells lovely and glides on your skin
I have had many compliments on how good my skin is looking . I would say you will see a difference in about two weeks . I use the Vitamin c in the morning and the hyloronic acid at night under my night cream
In love with the Vitamin C serum, it has transformed my complexion to be uniform, spot-free and less weathered. I have been searching for a one-stop solution like this my entire adult life!
I’m a skin specialist I never normally recommend any one brand to my clients. But the vit C is absolutely amazing. The best I have come across. Will continue to use myself and to recommend.
Store owner replied:
Hello Jacquie, thank you for taking the time to leave a review of Triple Vitamin C Serum. We're so pleased to hear that you're loving the product and that you enjoy how it makes your skin feel. If you ever have any questions, please don't hesitate to reach out to us at hello@duogenskin.co.uk.
The DuoGen Team
It’s amazing how nice my face feels after using these two products. I will purchase again.
Store owner replied:
Hello Susan, thank you for your review of The Morning Duo. We're delighted to hear you're enjoying the products and that you've had such a positive experience. We appreciate your support and look forward to your next order. If you ever need anything, you can reach us at hello@duogenskin.ca.
The DuoGen Team
I asked for a refund without a response.
It’s very smelly.
Store owner replied:
Hello Deanna, thank you for your feedback. We're sorry to hear that the Triple Vitamin C Serum wasn't the right fit for you. We've checked our support inbox and haven't been able to locate a refund request from you. We've reached out directly to help resolve this. Please check your inbox or contact us at hello@duogenskin.ca, and we'll be happy to assist.
The DuoGen Team
Hi, I’ve been using your product for a long time and appreciate it. I’ve recommended it to many clients and friends because of its consistent quality and performance.
I’d just like to ask that you please keep the product at this same high standard and avoid changes that could affect its quality.
Store owner replied:
Hello Valentina, thank you for your review of the Triple Vitamin C Serum and for your continued support over such a long time. It means a lot to hear that you’ve recommended DuoGen to your clients and friends based on your experience with the product. We truly appreciate your feedback regarding consistency and quality, and we understand how important that is when it comes to skincare you trust and rely on. Thank you again for taking the time to share your thoughts. If you ever need anything, you can reach us at hello@duogenskin.co.uk. The DuoGen Team
Store owner replied:
Hello Kevin, thank you for your review of the Triple Vitamin C Serum. We’re glad to hear you’re enjoying it. If you ever need anything, you can reach us at hello@duogenskin.co.uk.
The DuoGen Team
Used this serum for years. Beautiful quality product.
Store owner replied:
Hello Anita, thank you for sharing your experience with the Triple Vitamin C Serum. We’re so pleased to hear you’ve been using it for years and love the quality of the product. It’s always great to hear from long-term customers. If you ever need anything, you can reach us at hello@duogenskin.ca.
The DuoGen Team
I love this serum . The smell takes a bit to get used to but the serum works better than anything I have ever used.
Store owner replied:
Hello Jennifer, thank you for sharing your experience with the Triple Vitamin C Serum. We’re so pleased to hear the serum has been working so well for your skin and delivering results beyond other products you’ve tried. If you ever need anything, you can reach us at hello@duogenskin.ca.
The DuoGen Team
Great product that makes my skin feel amazing, will definitely buy again
Store owner replied:
Hello Tina, thank you for sharing your feedback on the Triple Vitamin C Serum. We’re so pleased to hear it leaves your skin feeling amazing and that you’re planning to repurchase. It’s wonderful to know it’s delivering results you can feel. If you ever need anything, you can reach us at hello@duogenskin.co.uk.
The DuoGen Team
I have been using DuoGen for over two year's now and have received many compliments about my skin. I will be 63 this year, but certainly don't feel it or hopefully look it with the help of DuoGen
Store owner replied:
Hello Teresa, thank you for sharing your experience and for being with DuoGen for over two years. It’s wonderful to hear you’ve been receiving so many compliments on your skin and that DuoGen continues to support your routine. If you ever need anything, you can reach us at hello@duogenskin.co.uk.
The DuoGen Team
I've been using it for over 2 years now and I'm satisfied with the results. I'm 45 and just trying to keep my skin as good as I can for a long as I can. I use it with Dr Organic moisturiser and eye cream and it all seems to work well.
Store owner replied:
Hello Julie, thank you for sharing your experience and for being with us for over 2 years. It’s great to hear that the Triple Vitamin C Serum has continued to support your skin goals and that it fits well into your routine. We really appreciate you taking the time to leave a review. If you ever need anything, you can reach us at hello@duogenskin.co.uk.
The DuoGen Team
We stand behind every formula—no matter your skin type or concern. If you’re not completely satisfied, even after using the product, we’ll refund you in full. That’s our 100-day promise to help you shop with confidence.
