4.7
Rating
Product summary
Product Highlights
- Revolutionary technology to stabilize 20% pure L-ascorbic acid (the most effective form of Vitamin C)
- Brightens overall complexion and fades hyperpigmentation / dark spots
- Stimulates collagen production
- Solid stick formula for easy, mess-free & targeted application
- Protects skin from photodamage and free radicals (use with SPF)
- Free of: Alcohol, Essential Oil, Derivative of Coconut, Dye, Fragrance, Gluten, Paraben, PEG, Phthalate, Soy and Sulfate
- Shelf life: 15 months | Period after opening: 9 months
Vegan
Cruelty-free
AM
Use with sunscreen
Vitamin C
Vitamin E
Squalane
Easy
Helps with hyperpigmentation
Radiant
Ingredients
How to use
FAQ
Why we love
using it
Collagen boosting!
L-ascorbic acid is one of the top researched and confirmed anti-aging ingredients. At 20% concentration, Frequen-C aids in collagen production resulting in firmer skin.
Hyperpigmentation, be gone
Melasma, sun spots, or acne marks show significant improvement after 30 days of continued use.
Complements SPF
Frequen-C helps boost the performance of your SPF. The antioxidant in the formula also helps to fight off free radicals alongside your choice of sun protector.
Perfect primer
Skip your primer and use Frequen-C. It acts as the perfect base for a flawless look.
Stable L-ascorbic Acid
A revolutionary formulation with 20% hyper-stabilized Vitamin C.
Pair it with
AM for oily/combo skin
AM for dry skin
STEP 1
Cleansing Oil
Ritual No1
Pump a pea-size amount of the cleansing oil and roll the formula around the most oily parts of the face for 30-60 seconds. (i.e. around the nose and t-zone) Emulsify the oil using lukewarm water.
View productSTEP 2
Gentle Cleanser
Ritual No2
Using 2-3 pumps, create rich foam to wash the entire face. Ritual No2 is a gentle cleanser formulated without SLS/Sulfate to leave your skin comfortable and hydrated.
View productSTEP 3
Hydrating Essence
Source
Directly after cleansing, pat dry with a clean towel until the skin is damp then apply a nickel-size amount essence immediately using hands. Press the formula into your skin until it absorbs.
View productSTEP 4
Vitamin-C
Frequen-C
Use only in the AM after Source has completely absorbed (if not, formula could peel), use 4-6 strokes over entire face. Hyperpigmentation, melasma, sun spots, or acne marks will show significant improvement after 30 days of continued use.
View productSTEP 5
Moisturizer
The Seven
Follow with The Seven complete moisturizer (our best seller) for instantly glowing, lively skin. Use a dime-size amount for the entire face. The formula is light, norishing, and hydrating without being oily.
View productSTEP 6
Sunscreen
This is your reminder to apply SPF daily! For oily/combination skin type, we recommend EltaMD’s UV Clear SPF 46, or Paula's Choice Extra Care Oil Free SPF 50. Fun fact, Frequen-C helps boost the performance of SPF!
What people
are saying
Frequen-C entered my life and it changed everything (dramatic, but true!). I was blessed to be a part of MBX for this product and it was so rewarding watching this baby come to life from samples to what it is now.
Reviews & Ratings
64
ReviewsFilter reviews
Newest
alexisgcantillo
✓ Verified Buyer
Melts into the skin!
I’m very impressed with this vitamin C! I didn’t know how my dry skin would like the balm formula but the product glides on the skin so nicely- literally melts. It didn’t cause any irritation and my skin is noticeably brighter! It pairs like a dream with the seven.
❤ Recommends
Skin TypeDry
ComplexionFair
Age Group30-39
carrieleppo
Colorado
✓ Verified Buyer
Love product, don’t love wasted 1/2 at the end
So I have tried all Monday born products, except one cleanser, and really like them all. The frequen-C was no different. I definitely noticed a difference in my skin after a month. I liked the formula-wore well under other products and with sunscreen and makeup on top. I actually prefer this vitamin C formula over the big name, well known formula I had been using for years- no weird smell or stickiness once on!
The only thing I didn’t like was the tube at the end. One tube lasted me 5 weeks (again aging and it was summer so I was using it daily on most of my face). At the end, there was close to a 1/2 inch of product that you couldn’t use without digging in with your fingers or a q-tip. I dug because I wanted to use it all and was shocked how much was still left in the tube once you extended it as much as it would allow. I understand you need a base so it doesn’t fall out or break, but this seemed like quite a lot of product to waste.
I would buy again because the product is great, but the tube could def use some improvement.
❤ Recommends
Skin TypeNormal
ComplexionMedium
Age Group40-49
cassity
Anchorage, Alaska
✓ Verified Buyer
Great product
I have sensitive skin and in the past have used other vitamin c serums and broke out bad. This is the first treatment that I did not have a bad break out or burning sensation, I see certain dark spots on my face fading. Love this product.
❤ Recommends
Skin TypeCombination
ComplexionFair
Age Group30-39
Jchawla92
✓ Verified Buyer
Visibly reduces dark marks!
For someone who suffers from post-inflammatory hyperpigmentation after acne, Frequen-C is the first product to show a visible difference on my skin after consistent use! Truly worth it!
❤ Recommends
Skin TypeOily
ComplexionMedium
Age Group25-29
NKap
✓ Verified Buyer
Great Vitamin C!
I was skeptical at first about this product because I have very reactive, sensitized skin, especially when it comes to vitamin C. I thought there was no way a product with 20% vitamin C would work on my skin. After trying this balm for a few weeks, my skin has had zero reaction-it’s a miracle! A definite must have in your routine.
❤ Recommends
Skin TypeCombination
ComplexionFair
Age Group40-49