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TRU OLOGY C-Boost Intense Defense Serum bottle on a white background
Truology C-Boost Intense Defense Serum
TRUology A² Advanced Retinal Serum .2% Retinal Serums TRUology
TRUology A² Advanced Retinal Serum .2% Retinal Serums TRUology
TRUology A² Advanced Retinal Serum .2% Retinal Serums TRUology
TRU OLOGY C-Boost Intense Defense Serum bottle on a white background
Truology C-Boost Intense Defense Serum
TRUology A² Advanced Retinal Serum .2% Retinal Serums TRUology
TRUology A² Advanced Retinal Serum .2% Retinal Serums TRUology
TRUology A² Advanced Retinal Serum .2% Retinal Serums TRUology

Truology C-Boost Intense Defense Serum

Truology C-Boost Intense Defense Serum

$134.00
$134.00
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Details

Truology C-Boost Intense Defense Serum 1 fl oz | 30 ml

 

Formulated with 20% Tetrahexyldecyl Ascorbate (THD Ascorbate), C-Boost delivers next-generation vitamin C efficacy with enhanced dermal penetration and exceptional stability. This lipid-soluble form of vitamin C integrates seamlessly into the skin’s lipid matrix, where it stimulates collagen synthesis, reduces oxidative stress, and improves overall skin tone and firmness.

 

Supported by a multi-antioxidant defense system, C-Boost combines 15 clinically recognized antioxidants — including Astaxanthin, Ferulic Acid, Glutathione, Ergothioneine, and Green Tea Polyphenols — to target multiple pathways of oxidative degradation. This synergistic complex provides broad-spectrum protection against free radical damage, UV-induced lipid peroxidation, blue light exposure, and pollution-related stress.

 

Additional actives such as Bisabolol, Licorice Root, and Turmeric Extract help calm visible redness and support barrier resilience, while Squalane and Sodium Hyaluronate maintain optimal hydration and skin suppleness.

 

C-Boost’s pH-balanced, non-irritating, and fragrance-free formulation is engineered for universal tolerability — even on sensitive skin. Its advanced stabilization system ensures long-term potency and consistent delivery of all actives to the dermal layers.

non tacky | non irritating | scent-free | stable formula

Benefits

  • Brightens skin and enhances skin radiance and tone
  • Refines skin texture and reduces the appearance of lines and wrinkle's
  • Scavenges free radicals, combats oxidative stress, reduces inflammation

Directions

Use every morning and evening after cleansing. Apply to dry face, neck and décolleté.

Ingredients

WATER, TETRAHEXYLDECYL ASCORBATE, SQUALANE, GLYCERIN, PROPANEDIOL, CAPRYLIC/CAPRIC TRIGLYCERIDE, CETEARYL ALCOHOL, SODIUM HYALURONATE, TRIPEPTIDE-2, ASTAXANTHIN, BISABOLOL, GLUTATHIONE, ERGOTHIONEINE, CETEARYL OLIVATE, SORBITAN OLIVATE, CETEARETH-20, FERULIC ACID, FULVIC ACID, PLANKTON EXTRACT, CHLORELLA VULGARIS EXTRACT, ZINGIBER OFFICINALE (GINGER) ROOT EXTRACT, CAMELLIA SINENSIS (GREEN TEA) LEAF EXTRACT, VITIS VINIFERA (GRAPE) SEED EXTRACT, CURCUMA LONGA (TURMERIC) ROOT EXTRACT, GLYCYRRHIZA GLABRA (LICORICE) ROOT EXTRACT, ARCTOSTAPHYLOS UVA-URSI-LEAF (BEARBERRY) EXTRACT, TOCOPHEROL, MAGNESIUM ASCORBYL PHOSPHATE, LECITHIN, ACRYLATES/C10-30 ALKYL ACRYLATE CROSSPOLYMER, CARBOMER, PHENOXYETHANOL, ETHYLHEXYLGLYCERIN, SODIUM HYDROXIDE

non tacky | non irritating | scent-free | stable formula

Clinical Studies

Clinical Study Results:

  • 85.71% of participants showed improvement in overall skin health.
  • 75.00% of participants showed improvement in skin dryness.
  • 67.86% of participants showed improvement in background redness.
  • 78.57% of participants showed improvement in skin brightness.
*Study conducted on 33 women over 6 weeks who used TRUology C-Boost & TRUology Barrier Restore twice a day (morning and night) with the addition of TRUOlogy A² Advanced Retinal Serum .2% 1 time a day (night).

FAQ

What’s the difference between the C-Boost serum and the Vita C3 serum?

C-Boost is formulated with 20% THD ascorbate, a lipid-soluble, stable derivative of vitamin C, combined with firming peptides and a 15 key antioxidants.  It’s emollient base gives it a higher moisturization profile, making it the preferred formula for dry skin types or individuals who experience irritation with L-ascorbic acid.

Vita C3 combines gold-stabilized L-ascorbic acid with THD ascorbate and magnesium ascorbyl phosphate (MAP), supported by key master antioxidants and zinc PCA.  Zinc PCA contributes antimicrobial and sebum-regulating properties, positioning Vita C3 as the more targeted option for acne-prone or oily skin. 

Both formulations are suitable for all skin types, indicated for twice-daily use, and compatible with Truology A2 Retinaldehyde in a nighttime regimen. 

Can I use C-Boost under the eyes?

Yes, C-Boost can be used on the skin under the eyes 

View full details

Overall rating: 4.9387755 / 5 from 49 reviews.

AI Generated Review Summary

Truology C-Boost Intense Defense Serum enhances skin brightness and even tone, offering next-generation vitamin C efficacy with a multi-antioxidant defense system. It provides broad-spectrum protection against oxidative and environmental damage, supported by clinical study results showing significant improvements in skin health, dryness, redness, and brightness.

Summary topics

  • Skin Brightness (50%): A substantial number of customers remarked that this product makes their skin look brighter and more even-toned.
  • Vitamin C Efficacy (11%): It was highlighted by customers that this is the best vitamin C they have ever used and they are about to repurchase it.
  • Skin Appearance (16%): Many customers remarked that this product makes their skin look brighter, more even-toned, and glowy.

Review topics: ["irritation","skin","results","difference","feels","texture","looks","serum","glow","formula","vitamin c","lines","vitamin","truology products"].

Review highlights

  • "It’s my new favorite, vitamin C. My skin has looked great, it glows, and I’m not getting any hormonal breakouts." — Debbie R.
  • "My skin looks brighter with this!" — Shabnam
  • "It makes my skin look amazing." — Erin

Reviews

Finally a vitamin C my skin loves

"I’ve struggled to find a vitamin C that my sensitive skin can tolerate, and C-Boost has been amazing. It leaves my skin looking brighter, smoother, and more hydrated without causing irritation or redness. I also love how easily it layers with the rest of my skincare. Definitely one of my favorite products in my routine!"

— Jess (5/5)

This is my go-to

"I am addicted to this vitamin C. Probably the best I have ever used. It is so much more creamy than the Vita C and it doesn’t color my skin like the Vita C does. Blends very well under makeup and doesn’t pill up. Just a beautiful product. Makes my skin look bright and vibrant."

— Laura (5/5)

My favorite vitamin c of

"My favorite vitamin c of all time! Will always be a staple in my routine! Absorbs so easy, feels so clean, and is super effective!"

— Nancy H. (5/5)

I do see discoloration fading,

"I do see discoloration fading, used one bottle."

— Angelica Y. (5/5)

Great product!

"This vitamin c truly makes your skin glow! I love this product and will never be without. I use it twice daily and my skin has never looked better and that’s saying something as I’ll be 46 years old in a couple weeks! Highly recommend!"

— Retha C. (5/5)

Awesome Vit C Serum

"I have mature, oily, acne prone skin and have found that I just prefer a 20% THD Ascorbate over other forms of Vitamin C. This serum is light, absorbs well and layers very easily with other products. No pilling with makeup etc. I love the additional anti-oxidants/actives in the ingredient deck and incorporating this serum (alongside a couple others) into my AM routine. I do find this a little more hydrating so tend to use it more in winter than summer."

— Sara W. (5/5)

Great for sensitive skin

"The only Vitamin C my sensitive skin can handle. Love that I can also use this under my eyes. Fantastic product"

— Sharon M. (5/5)

"Recommend this product. Not irritating my skin but leaves skin moisturized and soft. It is in carrot orange color and has a fishy smell, but i gues that’s how it supposed to be."

— Sandra (5/5)

C-Boost

"I’ve been using C-Boost consistently since they started to ship internationally and I incorporate this product at night with my Truology Vita-A Serum, absolutely Love the new delivery system and I’m hoping that the other products will eventually all be like this, it’s much better than the twist cap, which I did have a couple of the twist caps break on two of my Barrier Creams and One on my Vita-A2 Serum, other than that, my skin has never looked so good and I hardly wear makeup anymore, I feel confident enough to leave my home with no makeup, just a tinted sunscreen."

— Janelle M. (5/5)

Best Vitamin C

"This is my go to vitamin C serum. My skin is brighter and it’s very hydrating. I’m 66 years old and people cannot believe my age. I have been using this for a year now and I cannot be without it. It’s difficult to find a vitamin C with this awesome ingredient deck."

— Cindy S. (5/5)

Q&A