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Vitamin C Cold Pressed Oil™


(23 customer reviews)

Our best selling Vitamin C Oil combines cold-pressed plant oils rich in “master antioxidants” with next generation Tetrahexyldecyl Ascorbate (THD) the gold-standard vitamin c ester that works at the dermis layer to rapidly correct dark spots, skin imperfections and to boost collagen production. This antioxidant formula instantly plumps and hydrates the skin for a radiant and glowing complexion. Can be used alone or mixed into your favorite serum or moisturizer.


There is a lot of buzz about the breakthrough ingredient Tetrahexyldecyl Ascorbate – a lipid soluble non-oxidizing form of vitamin that is able to penetrate the epidermis and move to the layer underneath called the dermis. It is the only form of vitamin c that can boost collagen production because it is fat-soluble, unlike L-Absorbic Acid which is water soluble and only works on the epidermis layer. As we age our fat pads that give us that youthful appearance start to decline, THD Ascorbate helps to boost the collagen and works over time to create a youthful cushion. Using tetrahexyldecyl ascorbate means your skin benefits more from the use of vitamin C products without the common dryness and irritation associated with L-Absorbic Acid.



FORBES MAGAZINE  – “Mary Allan’s Vitamin C Oil incorporates 10% tetrahexyldecyl ascorbate (THD), which is more lipid soluble than other forms of Vitamin C. (Translation: it penetrates the skin better and faster.)” 


NEW YORK MAGAZINE – “Mary makes the purest, most extraordinary oils for the face” 




  • At 0.1% reduces melanin synthesis by 80%
  • At 10% eliminated age spots in 16 weeks
  • At 0.1% in vitro increases collagen by 50%
  • Tested at 10% in vivo to treat acne with 80% (12 people) satisfied with results
  • Increases collagen synthesis twice as much as L-Ascorbic Acid
  • Protects the cells against UV-B better than other esters of Vitamin C



1. (THD) is able to penetrate the epidermis and move to the layer underneath called the dermis where it can boost collagen production. Unlike L-Absorbic Acid which is water soluble and can only sit on the epidermis layer and is unable to boost collagen. 

2. (THD) is highly stable and does not oxidize like L-Absorbic Acid. 

3. (THD) Ascorbate at 10% is equal to 18% L-Absorbic Acid due to it’s lipid profile, it does not irritate the skin like L-Absorbic Acid because it is lipid soluble and has a higher PH range that is compatible with the skin’s acid mantle layer unlike L-Absorbic Acid which is typically a PH range of 3.5 and causes dryness to the epidermis layer. 

4. (THD) has zero tackiness that is common with L-Absorbic Acid, (THD) can be applied under make-up. 


Perfect For:  All Skin Types – especially sun damage and aging skin types, devitalized complexions that need brightening and collagen boosting. The beautiful deep orange color comes from the high level of beta-carotenes. This treatment oil is plastic free and made with non-comedogenic cold-pressed plant oils. 


The Perfect Pairing

* Our skin loves and needs both water and oil for optimal radiance. When using a face oil it is important to add the water element underneath the face oil. Our Infused Beauty Water is the perfect pairing for our Cold Pressed Face Oil to lock in maximum hydration.


*This face oil is customizable and can be made without Neroli and Rose Otto which we use for regenerative skin benefits at (0.05%). Since we know some customers prefer a face oil without essential oils please let us know in check-out notes if you prefer this to be made without neroli & rose essence.


    Tetrahexyldecyl Ascorbate 10% (Vitamin C Ester): 10% THD is equal to 18% L-Absorbic Acid - A superior and highly stable form of vitamin c ester, clinical studies have shown Tetrahexyldecyl Ascorbate to stimulate collagen production as well as clarifying and brightening the skin by inhibiting melanogenesis (the production of pigment) thereby promoting a more even skin tone. Unlike ascorbic acid, it will not exfoliate or irritate skin and will remain stable in formulations.
Cold Pressed Blueberry Seed Oil: Highly beneficial oil rich in antioxidants and polyphenols.
    Cold pressed Rosehip Seed Oil: natural source of topical trans-retinoic acid (vitamin A) - Rosehip Seed Oil contains the benefits of retinol but without secondary side effects such as irritation, because it is a natural source and is part of the whole fruit oil.
This booster oil can be applied directly to the skin or mixed with your favorite moisturizer, mask or serum. Add a few drops into the palm of your hand to mix.
    For: Anti-aging / Dark Spots / Loss Of Firmness / Sun Damage / Pollution / Not suitable for overly sensitive skin types
Application: Apply a few drops to face, neck and decollete in the AM or PM. For optimal results mist face with a water-based essence first so that the oils seal in a layer of hydration underneath. Then apply make-up overtop once the oils have fully absorbed. Face oils should always be applied after water-based serums and creams.
    Precautions: Not to be used on irritated or active skin, acne skin, rosacea, open sores or other skin ailments. Avoid contact with eyes, do not apply to eye lids. Keep out of reach of children. Always do a sensitivity test before using and discontinue use if any irritation, rash or redness developes and consult a physician.
Use By Date: This booster contains high concentrations of active ingredients that are at their most potent within 9 months from purchase date. All of Mary Allan skincare products are made fresh to order and do not sit on retail shelves for long periods of time to ensure maximum potency of active Ingredients.
    Disclaimer: Statements contained herein have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent disease. Always consult with your professional skin care provider and or physician before use.
Total Ingredient Composition: Argania spinosa (Cold pressed) Oil*, Raphanus Sativus (ECOCERT Daikon) Seed Extract, Tetrahexyldecyl Ascorbate (VITAMIN C), C13-15 Alkane (Light-Squalane from sugar molecules), Hippophae rhamnoides (Cold pressed Seabuckthorn) Oil*, Rosa canina (Virgin Cold pressed Rosehip) Seed Oil*, Vitis Vinifera (Extra virgin cold pressed grape) seed oil*, Vaccinium angustifolium (cold pressed blueberry) seed oil*, Punica Granatum (Cold pressed Pomegranate) Oil*, Daucus carota (Resin) Extract*, Rosa Damacena (Thermal Steam) Otto*, Citrus aurantium (Steam Distilled Neroli) Flower Oil, Citrus aurantium ssp. amara (Petigrain) formulated at (0.05%) for cellular regenerating skin benefits. This formulation is available without rose and neroli essential oil.
    Ingredient Classification: **Wildcrafted Ingredients. *Organic Ingredients.
Glass Packaging: Each product is hand blended and poured into glass packaging that is 100% recyclable.
    Beauty Without: Parabens - Phthalates - Synthetic Colors - Hydroquinone - Artificial Fragrance - Formaldehyde - Silicone - Mineral Oil - Not Tested On Animals. Please note that because we do not use artificial colors that the color of the products may change from time to time due to their natural origin. In addition actual colors of products may vary due to the fact that every computer monitor has a different capability to display colors and that everyone sees these colors differently.







Tetrahexyldecyl Ascorbate Vitamin C

Cold Pressed Argan Oil

Cold Pressed Daikon Seed

Cold Pressed Rosehip Seed Oil

Chardonnay Grape Seed Oil

Cold pressed Seabuckthorn Oil

Cold Pressed Blueberry (Pterostilbene) Seed Oil

Cold Pressed Pomegranat Seed Oil

Carrot Seed Resin

Neroli Flower

(Tetrahexyldecyl Ascorbate)
    1.  A superior and highly stable form of vitamin c ester, clinical studies have shown Tetrahexyldecyl Ascorbate to stimulate collagen production as well as clarifying and brightening the skin by inhibiting melanogenesis (the production of pigment) thereby promoting a more even skin tone. Unlike ascorbic acid, THD does not cause skin irritation because the PH level is higher since it is oil soluble.THD has been clinically shown to boost collagen at the dermis level helping to plump and restore our fat cushion that starts to decline as we age.

*This is a made “fresh to order” beauty oil and takes approximately 3 days to ship.

30 ml 1 fl. oz.

Beauty Without: No Parabens, Phthalates, Synthetic Colors, Hydroquinone, Artificial Fragrance, Formaldehyde, Plastic Ingredients, Mineral Oil. 


23 reviews for Vitamin C Cold Pressed Oil™

  1. Carol Browne – Verified Buyer

    I found out about this vitamin c oil from an article that I read so I decided to try it. OMG! I love this oil. It makes my skin so soft and smooth. It has a really beautiful light scent that smells like citrus, I love the ingredients and that I can wear it under make-up and moisturizers. This is my new favorite!

  2. Stacie Marks – Verified Buyer


    I read an Article that mentioned this product so I decided to try it. This is so pure and powerful, I have already seen a change in my dark spots which have started to fade. I have been using it for 3 months now. This is so high quality and the aroma is light and uplifting!

  3. Terry Jacobs – Verified Buyer

    THIS IS MY NEW FAVORITE VITAMIN C SERUM! I read an article by Suze Orman who loves this oil so I decided to give it a try. After I did alot of research I realized this oil contains the very best form of vitamin c called: THD Absorbic – a next generation highly stable form of vitamin c that can boost collagen production. I was so tired of using L-Absorbic Acid which tends to dry my skin out and cause redness – not the case with this oil. It has faded my dark spots and leaves my skin so smooth. I use it Am and PM and also add a couple of drops after my foundation to give a little glow. I’m obsessed with the scent. Really high quality, will be purchasing again!

  4. Natalie Mills – Verified Buyer

    I have been using this for about 3 months now and I have definitely noticed a reduction in my sun spots. I purchased this after searching out Tetrahexyldecyl Ascorbate and really love that is not only helps with my pigmentation issues it also gives a beautiful radiance to my skin. I use it in the AM and PM after cleansing and my essence. So beautiful, will repurchase!

  5. Christine – Verified Buyer

    This is hands down the best vitamin c booster I have used. I have dry sensitive skin and had read about THD Absorbic so was looking for a product that contains this ingredient. I have a lot of sun damage so I have been using this to help with my dark spots. I apply directly to the sun spot and have already noticed a difference in the 8 weeks since I have been using this. The quality is so high and I love that it contains natural plant oils instead of silicones. So happy to come across this, a true find!

  6. Lisa D. – Verified Buyer

    This is my new favorite vitamin c treatment. I have been using this for about 3 months now and have seen a huge improvement in my dark spots and overall hydration in my skin. I have been a long time user of vitamin c serums and found most of them just dried out my skin. I love that this is an oil based serum and I have had no irritation at all from this. I love the light citrus scent, so uplifting and pleasant to use. BTW – I also use a few drops onto of my foundation to give a little extra glow.

  7. Samantha Kent – Verified Buyer

    Seriously the best vitamin c serum I have come across so far. For years I have been on a quest to find the best L-Absorbic Acid on the market only to be disappointed over and over again with a vitamin c serum that does absolutely nothing for my skin. I read an article about (THD) Ascorbic and decided to try this after searching out the ingredient. I have now been using this oil for about 3 months and thrilled with my results. First off it does not dry out my skin or cause any irritation and I can already see my sun spots look a bit lighter. I have been using this day and night after cleansing. Will repurchase again. And by the way also want to mention how incredible the customer service is. I filled out the on-line questionnaire and received excellence advise back from the in-house esthetician. So helpful and knowledgeable.

  8. Melanie R. – Verified Buyer

    Love the results I’m getting with this vitamin c oil. I have been using this for about 4 months now and just reordered this. It is so gentle yet effective exactly what I was looking for! Highly recommend!

  9. Sally – Verified Buyer


    I decided to purchase this after I did some searching for THD Ascorbate and so far very happy with the results that I’m getting. I have been using this at night for the past few months and starting to see my sun spots are fading. I really love that this in an oil form as my skin tends to be on the dry side. I will be re-purchaing my second bottle.

  10. Amy – Verified Buyer


    I have never had much success with vitamin c serums as most of them either leave my skin really dry and or irritated. I decided to try this one because I had read that THD Ascorbate was a more powerful yet gentle form of vitamin c. I have been using this for 8 weeks now and so happy to say that my dark spots are starting to fade and I have seen an increase in hydration. I use this at night after my cleanser, I don’t find I need a moisturizer but may add one overtop in the cooler months. I will be repurchasing this again!

  11. Grace Evans

    I’m really impressed with this vitamin c serum. I have oily congested skin and this is the first time i can use an oil on my skin without any breakouts. I love that this is the THD form of vitamin c and I also like the results I’m getting. This sinks into my skin with zero greasiness, such high quality ingredients that I noticed the first time I used this. Will repurchase again!

  12. Jennifer – Verified Buyer


    This is such an amazing vitamin c oil and perfect for my dry skin. I love that I can combine a vitamin c plus beauty oil into one product! I have been using this day and night and so happy with how smooth and hydrated this makes my skin. I have noticed a slight reduction in my sun damage, will repurchase!

  13. Sandra Bennnet – Verified Buyer


    I have tried so many vitamin c serums and none work as well as this one. I love that this is an oil so that I get both my vitamin c and beauty oil in one. My skin feels so soft and radiant after I use this, I never want to run out!

  14. Elizabeth Martin – Verified Buyer

    THE BEST!!!!

    This is by far the best vitamin c treatment oil I have ever tried. I was searching for THD Absorbate when I came across this treatment oil. The ingredients are so pure and effective! It leaves my skin feeling so smooth and radiant and the light citrus scent is divine!

  15. Ava Daniels – Verified Buyer

    I’m on my second bottle of this vitamin c oil and never want to run out! It helps with my sun damaged and hydrates my skin better then any beauty oil I have tried. I love that this is a vitamin c and treatment oil in one and I don’t have to use L-absorbic acid which always left my skin dry and red. Such a great find! Very helpful and knowledgeable customer service, I highly recommend filling out the on-line questionnaire.

  16. Amanda – Verified Buyer

    I recently discovered Mary Allan skin care and filled out the on-line questionnaire (highly recommend) and her in-house esthetician emailed me back with a few suggestions including this vitamin c oil. I have sensitive / dry skin and have found L-absorbic acids too strong for my skin and now so thrilled that I can use a potent form of vitamin c that doesn’t cause irritation and actually hydrates my skin. I use this in the AM and PM, my skin feels so smooth and hydrated – will be repurchasing.

  17. Susie K. – Verified Buyer

    This is the best!

    Just love how hydrated and glowing this makes my skin. It is potent yet so gentle, I use this in place of my daily moisturizer! My new favorite!

  18. Kelly A. – Verified Buyer

    So happy to come across this vitamin c oil at the SoHo beauty lounge. This has worked so well for me, better then any vitamin c oil I have tried. I use it in the AM under my make-up and just love how hydrated my skin looks.

  19. Carla – Verified Buyer

    Love how hydrated and glowy my skin looks when I apply this. I find I can wear this alone without a moisturizer. Sinks in and is zero greasy.

  20. Sandra R. Verified Buyer

    I came across this at a store in New York and so happy I did! My skin is glowing and hydrated, getting tons of compliments. Love!

  21. Susie – Verified Buyer

    Love that this is a beauty oil and vitamin c in one. I was researching (THD vitamin C) when I came across this on the blog. I’m now on my second bottle, my skin is glowing and hydrated!

  22. Michelle – Verified Buyer

    This vitamin c has worked better then any L-Absorbic Acid serum hands down. I have seen results so quickly, love how hydrated my skin feels and that it does not cause redness in my skin like absorbic acid based serums. I have been using this in both the Am and Pm before I apply my moisturizer. Can’t say enough about the high level of customer service, I highly suggest filling out their on-line form to get help with your skin.

  23. Beth Wein – Verified Buyer

    Already seeing results!

    I have been using this daily in the AM for the past 4 weeks and already seeing results! I have acne skin with scars and dark spots and this is the only vitamin c oil that doesn’t break me out and actually helps fade the dark spots. This is super hydrating, my skin feels so smooth and hydrated after I use this.

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