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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

$133.00
$133.00
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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).
View full details

Overall rating: 4.9347825 / 5 from 46 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%
  • Vitamin C Efficacy: 11%
  • Skin Appearance: 16%

Review topics: ["results","irritation","formula","lines","skin","looks","difference","serum","vitamin c","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

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)

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)

MY FAV!!!!

"This Vit C is the BEST in its class. It’s like a blanket providing hydration , moisture and glow. It not only protects your skin but changes and enhances it!! I used several bottles of this and will repeat purchase for sure. It’s amazing in the winter esp for me. I love it!!!!"

— Rosalba (5/5)

Love this serum

"My pigmentation seems lighter and my skin is calmer as well. Goes well with other products as well."

— Andy L. (5/5)

Obsessed

"This is my new favorite vitamin C. I have rosacea and this has cleared some of my redness and does not irritate my skin like other vitamin C serums have. Cant recommend enough for sensitive skin!"

— Jess (5/5)

Q&A