20 Best Anhydrous L Ascorbic Acid [2024]

Are you looking for the best Anhydrous L Ascorbic Acid? Based on expert reviews, we ranked them. We've listed our top-ranked picks, including the top-selling Anhydrous L Ascorbic Acid.

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1 Klaire Labs Vitamin C - 1000 Milligrams L-Ascorbic Acid in Coated Tablets to Protect from Oxidation... Klaire Labs Vitamin C - 1000 Milligrams L-Ascorbic Acid in Coated Tablets to Protect from...
2 Vitamin C Serum 20% Pure L-Ascorbic Acid, Ferulic Acid, Vitamin E and Hyaluronic Acid for Face and... Vitamin C Serum 20% Pure L-Ascorbic Acid, Ferulic Acid, Vitamin E and Hyaluronic Acid for Face...
3 Pure Encapsulations Ascorbic Acid Capsules | Vitamin C Supplement for Antioxidant Defense, Immune... Pure Encapsulations Ascorbic Acid Capsules | Vitamin C Supplement for Antioxidant Defense, Immune...
4 Vichy LiftActiv Vitamin C Serum, Brightening and Anti Aging Serum for Face with 15% Pure Vitamin C,... Vichy LiftActiv Vitamin C Serum, Brightening and Anti Aging Serum for Face with 15% Pure Vitamin...
5 Dearskin Vitamin C Serum 20% - PURE L-ASCORBIC ACID, Ferulic Acid, Hyaluronic Acid Botanic, Vitamin... Dearskin Vitamin C Serum 20% - PURE L-ASCORBIC ACID, Ferulic Acid, Hyaluronic Acid Botanic,...
6 The Ordinary 100% L-Ascorbic Acid Powder Fine 325 Mesh Topical Powder w/ Vitamin C The Ordinary 100% L-Ascorbic Acid Powder Fine 325 Mesh Topical Powder w/ Vitamin C
7 Mad Hippie Vitamin C Serum with Vitamin E, Skin Care Packed with Natural Vegan Active Ingredients,... Mad Hippie Vitamin C Serum with Vitamin E, Skin Care Packed with Natural Vegan Active...
8 GMO Free Vitamins - Ultra Fine Vitamin C Powder, Made in UK, UK Ingredients - Highest Grade of... GMO Free Vitamins - Ultra Fine Vitamin C Powder, Made in UK, UK Ingredients - Highest Grade of...
9 Vitamin C Facial Serum with L-Ascorbic Acid 15% with Vitamin B5 - for Fades Age Spots, Smoothing... Vitamin C Facial Serum with L-Ascorbic Acid 15% with Vitamin B5 - for Fades Age Spots, Smoothing...
10 NutriBiotic Ascorbic Acid Vitamin C Powder, 16 Oz | Pharmaceutical Grade L-Ascorbic Acid, 2000 Mg... NutriBiotic Ascorbic Acid Vitamin C Powder, 16 Oz | Pharmaceutical Grade L-Ascorbic Acid, 2000 Mg...
11 Sufficient-C high-dosed 4000 mg. Non-GMO Vitamin C - Lemon Peach Immune-Ade Drink Mix 250 Gram size... Sufficient-C high-dosed 4000 mg. Non-GMO Vitamin C - Lemon Peach Immune-Ade Drink Mix 250 Gram...
12 Naturium Vitamin C Complex Face Serum, Plus Hyaluronic Acid & Vitamin E, Anti Aging Skin Care... Naturium Vitamin C Complex Face Serum, Plus Hyaluronic Acid & Vitamin E, Anti Aging Skin Care...
13 Pure Original Ingredients Vitamin C Powder (1 lb) Ascorbic Acid, Non GMO, Dietary Supplement Pure Original Ingredients Vitamin C Powder (1 lb) Ascorbic Acid, Non GMO, Dietary Supplement
14 Bluebonnet Nutrition Vitamin C 1000 Mg Vegetable Capsules, Ascorbic Acid, for Immune Skin Health,... Bluebonnet Nutrition Vitamin C 1000 Mg Vegetable Capsules, Ascorbic Acid, for Immune Skin Health,...
15 Pure Original Ingredients Vitamin C, (100 Capsules) 100% Pure, No Additives Or Fillers, Lab Verified Pure Original Ingredients Vitamin C, (100 Capsules) 100% Pure, No Additives Or Fillers, Lab Verified
16 California Gold Nutrition Total C Complex, Vitamin C + Phytonutrients, 500 mg, 2.2 lb (1 kg) California Gold Nutrition Total C Complex, Vitamin C + Phytonutrients, 500 mg, 2.2 lb (1 kg)
17 Liquid Vitamin C Drops - VIT C - Bioactive Form L-Ascorbic Acid - Non-GMO - 120 Servings - Daily... Liquid Vitamin C Drops - VIT C - Bioactive Form L-Ascorbic Acid - Non-GMO - 120 Servings - Daily...
18 Thorne Buffered C Powder - Vitamin C (Ascorbic Acid) with Calcium, Magnesium, and Potassium - 8.32... Thorne Buffered C Powder - Vitamin C (Ascorbic Acid) with Calcium, Magnesium, and Potassium -...
19 Vitamin C 1000mg | 500 Caplets | Ascorbic Acid with Wild Rose Hips | High Strength Formula | Non-GMO... Vitamin C 1000mg | 500 Caplets | Ascorbic Acid with Wild Rose Hips | High Strength Formula |...
20 CeraVe Vitamin C Serum with Hyaluronic Acid | Skin Brightening Serum for Face with 10% Pure Vitamin... CeraVe Vitamin C Serum with Hyaluronic Acid | Skin Brightening Serum for Face with 10% Pure...
Bestseller No. 1
Klaire Labs Vitamin C - 1000 Milligrams L-Ascorbic Acid in Coated Tablets to Protect from Oxidation...
  • 1,000 mg of unbuffered vitamin C per tablet.
  • A water-soluble cellulose coating protects vitamin C from oxidation and allows for rapid tablet disintegration.
  • Contains: Tree Nut (coconut). Free of the following common allergens: milk/casein, eggs, fish, shellfish, peanuts, wheat, gluten, and soybeans....
  • Suggested Use: 1 tablet daily with food or as directed by a healthcare professional.
  • Trusted by healthcare practitioners since 1969, Klaire Labs products are developed closely with physicians and are intended to be used as directed by...
SaleBestseller No. 2
Vitamin C Serum 20% Pure L-Ascorbic Acid, Ferulic Acid, Vitamin E and Hyaluronic Acid for Face and...
  • THE MOST EFFECTIVE VITAMIN C SERUM FOR FACE DEVELOPED BY A DERMATOLOGIST: Formulated with the same exact ingredients as SkinCeuticals CE Ferulic but...
  • IMPROVES THE APPEARANCE OF DARK SPOTS, WHILE BRIGHTENING SKIN'S COMPLEXION: Our powerful pure Vitamin C serum with Hyaluronic acid working together...
  • INCREASES SKIN FIRMNESS AND REDUCES THE APPEARANCE OF LINES AND WRINKLES: Our CE Ferulic serum boosts collagen production in your skin to help even it...
  • GUARANTEED FRESH: We manufacture our Vitamin C serum every 2 weeks to make sure that the bottle you get is fresh and full of active Vitamin C E and...
  • 100 % GUARANTEE OR YOUR MONEY BACK: Our Vitamin C serum comes with a 60 days money back grantee, no questions asked. Just contact us and we will take...
Bestseller No. 3
Pure Encapsulations Ascorbic Acid Capsules | Vitamin C Supplement for Antioxidant Defense, Immune...
  • Vitamin C Supply: Ascorbic Acid is a dietary supplement to help individuals meet their daily vitamin C requirements.
  • Antioxidant Support: Vitamin C offers a wide range of support for the human body, and it is a potent antioxidant and free radical scavenger.*
  • Immune Support: Ascorbic Acid supports the body's defense system by promoting healthy cellular function including white blood cells and antibody...
  • Pure Quality: Our supplements are made with only premium ingredients sourced from trusted suppliers and guided by our nutritional experts, then...
  • Pure Difference: What makes us different isn't just our process or what goes into our supplements -- what we leave out matters, too. Pure...
Bestseller No. 4
Vichy LiftActiv Vitamin C Serum, Brightening and Anti Aging Serum for Face with 15% Pure Vitamin C,...
  • A dermatologist-grade Vitamin C serum that combines 15% Pure Vitamin C and Hyaluronic Acid for brighter and firmer skin in just 10 days
  • LiftActiv Vitamin C Serum is pure yet potent, with a minimalist formula of only 11 ingredients that is paraben-free and fragrance-free
  • Creates a visibly brighter and firmer complexion, smooths the appearance of skin texture, and reduces the look of fine lines in just 10 days
  • Pure and potent antioxidant formula helps address uneven skin tone and helps fight against signs of skin aging
  • Suitable for all skin types
Bestseller No. 5
Dearskin Vitamin C Serum 20% - PURE L-ASCORBIC ACID, Ferulic Acid, Hyaluronic Acid Botanic, Vitamin...
  • ✓EFFECTVELY REDUCES BROWN SPOTS, DERMATOLOGIST TESTED: Vitamin C Dear Serum works preventing and repairing free radical damage combating the early...
  • ✓Rough skin: Vitamin C Dear Skin formulation provides the skin with necessary moisture as well as antioxidants.
  • ✓Stops premature aging and wrinkling: Vitamin C Dear Skin formulation offers Anti-oxidant protection from free radicals, increasing directly the...
  • ✓Improves skin quality: Vitamin C Dear Skin improves the offer of key elements to produce new skin cells. This continual process is fueled by a body...
  • ✓Fades dark spots and brightens skin: Vitamin C Dear Serum Inhibit the synthesis of melanin, the pigment that attributes color to your skin, dark...
SaleBestseller No. 7
Mad Hippie Vitamin C Serum with Vitamin E, Skin Care Packed with Natural Vegan Active Ingredients,...
  • NATURAL VITAMIN C SKIN CARE: Our Vitamin C Serum effectiveness is multiplied by safe and organic Vitamin E + Ferulic Acid to double the antioxidant...
  • HEALTHY LOOKING SKIN WITH HYALURONIC ACID: Moisturizing and plumping hyaluronic acid minimizes signs of aging, leaves your facial skin looking fresh,...
  • BENEFITS OF STABILIZED VITAMIN C: Formulated with stable Vitamin C, our clean serum does not oxidize and has a natural yellow tint. It gives you...
  • PERFECT FOR ACNE PRONE AND SENSITIVE SKIN: Our Vitamin C Serum is perfect for use on acne prone or sensitive skin because our natural ingredients are...
  • NATURALLY BALANCING TONER & ASTRINGENT: Non-GMO & cruelty-free actives like clary sage work to balance facial skin as a natural toner and astringent...
Bestseller No. 8
GMO Free Vitamins - Ultra Fine Vitamin C Powder, Made in UK, UK Ingredients - Highest Grade of...
  • HIGHEST GRADE VITAMIN C: Manufactured by a leading Dutch company, we use DSM's highest grade of Quali-C for Ultra-Fine Vitamin C Powder with...
  • TASTE THE DIFFERENCE: With a pleasant lemon citrus flavor, it’s never been so easy to mix in essential nutrients for immunity and energy support...
  • FINE LIKE POWDERED SUGAR: This ultra-fine Vitamin C powder easily dissolves into your glass without the crystal residue often apparent in cheaper...
  • ONLY THE GOOD STUFF: Unparalleled in its purity, this non-GMO formula is free of additives and fillers, gluten, lactose, sorbitol, egg, fish, tree...
  • Amazon has changed their policy and stopped showing the 325 reviews from our 16 oz size. They are still visible on our website. Help us get back on...
Bestseller No. 9
Vitamin C Facial Serum with L-Ascorbic Acid 15% with Vitamin B5 - for Fades Age Spots, Smoothing...
  • REAL 15% VITAMIN C IS INCLUDED - Our Vitamin C is produced in small quantities and should be used within 6 months after opening. vitamin c is an...
  • THE SECRET TO YOUNG, REJUVENATED SKIN. If you are worried about showing the signs of aging, or if you have already begun to see the effects of age on...
  • THE HIGHEST FORM OF ACTIVE, BIO-AVAILABLE VITAMIN C AVAILABLE. our Vitamin C Serum helps diminish age spots while offering true antioxidant support to...
  • HYDRATING SERUM - Hyaluronic Acid deeply hydrates and plumps the skin instantly hydrating, replenishing, and boosting the skin's ability to retain...
  • THE BEST KOREAN SKIN CARE AT THE LOWEST PRICE - You will be hard-set to find the high quality ingredients in our products for even close to our price....
SaleBestseller No. 10
NutriBiotic Ascorbic Acid Vitamin C Powder, 16 Oz | Pharmaceutical Grade L-Ascorbic Acid, 2000 Mg...
  • POWERFUL IMMUNITY BOOSTER: our pure ascorbic acid powder is an easily dissolvable, absorbable form of Vitamin C that serves to fortify your body’s...
  • BE ACTIVE, STAY ACTIVE: a powerful antioxidant that supports the production of carnitine, collagen, and certain neurotransmitters, vital to supporting...
  • ESSENTIAL ANTIOXIDANT: each ½ tsp serving supplies 2000 Mg of pure, pharmaceutical-grade vitamin c
  • YOU’LL BE HAPPY IT’S MISSING: vegan, gluten-free and made without GMOs, milk, soy, eggs, yeast, wheat, rose hips, peanuts, tree nuts, fish,...
  • A TRUSTED SOURCE FOR OVER 40 YEARS: we were founded with the guiding principle that everyone deserves good health, and inspired by the research and...
Bestseller No. 11
Sufficient-C high-dosed 4000 mg. Non-GMO Vitamin C - Lemon Peach Immune-Ade Drink Mix 250 Gram size...
  • Refreshing, delightfully sweet immune-ade drink mix that features up to 4,000 mg of non-GMO Vitamin C --- gentle on stomach
  • Generously dosed L-Lysine, Bromelain and a unique 96% pure, caffeine-free green tea extract (EGCG) - Stomach buffering effect
  • 100% pleasantly water soluble making this lemon peach immune aid aesthetically pleasing as well
  • Non-GMO, gluten-free, vegan, kosher & sugar-free - premium stevia sweetened
  • Measuring scoop included ~ perfect for travel, office or as a college dorm staple
Bestseller No. 12
Naturium Vitamin C Complex Face Serum, Plus Hyaluronic Acid & Vitamin E, Anti Aging Skin Care...
  • ANTI-AGING, GLOWING SKIN: Vitamin C Serum brightens overall complexion & boosts collagen production, while shielding skin from environmental stressors...
  • POWERFUL, NON-IRRITATING FORMULA: Our Vitamin C Facial Serum contains high concentration of pure l-ascorbic acid & bioactive fruit blend.
  • BIOCOMPATIBLE & SAFE: Naturium skincare is formulated with both potent natural ingredients & advanced synthetic ingredients. They utilize efficacious...
  • HIGH QUALITY INGREDIENTS: Made with the highest-quality botanical, earth & marine-based ingredients combined with non-toxic-to-skin alternatives &...
  • CLEAN FORMULATION, NON-TOXIC: Cruelty free, paraben free, vegan, gluten free, fragrance free & non-toxic. Made with the highest-quality botanical,...
Bestseller No. 13
Pure Original Ingredients Vitamin C Powder (1 lb) Ascorbic Acid, Non GMO, Dietary Supplement
  • PURE Vitamin C Powder is made from a single ingredient, providing a pure undiluted supplement
  • Vitamin C is a naturally found in many fruits & vegetables
  • Easily soluble, can dissolve in lotions and creams as well
  • Always Pure; Never any additives or fillers
  • Packaged in Utah, USA
Bestseller No. 14
Bluebonnet Nutrition Vitamin C 1000 Mg Vegetable Capsules, Ascorbic Acid, for Immune Skin Health,...
  • Contains 1000 mg of identity-preserved (IP) Vitamin C in vegetable capsules
  • Antioxidant protection healthy immune function
  • 180 capsules, 180 servings
  • Soy-free, gluten-free, Non-GMO, Kosher Certified, dairy-free, vegan
  • Free of milk, egg, fish, crustacean shellfish, tree nuts, peanuts, wheat and soybeans. Also free of Yeast, gluten, barley, rice, sodium and sugar.
Bestseller No. 15
Pure Original Ingredients Vitamin C, (100 Capsules) 100% Pure, No Additives Or Fillers, Lab Verified
  • PURE Vitamin C Capsules are filled with a single ingredient, providing a pure undiluted supplement
  • Vitamin C is an essential nutrient
  • 100 Day supply: 3 months of peak health support
  • 100% Pure: No additives, stearates, or rice fillers
  • Made in Utah, USA
Bestseller No. 16
California Gold Nutrition Total C Complex, Vitamin C + Phytonutrients, 500 mg, 2.2 lb (1 kg)
  • California Gold Nutrition Total C Complex
  • 500 mg of Vitamin C + Phytonutrients
  • Rose Hips, Amla and Citrus Bioflavonoids
  • Formulated to Contain: No Gluten, No GMOs, No Soy
  • Produced in a 3rd Party Audited cGMP Registered (Certified) Facility
SaleBestseller No. 17
Liquid Vitamin C Drops - VIT C - Bioactive Form L-Ascorbic Acid - Non-GMO - 120 Servings - Daily...
  • EASY TO SWALLOW: Daily dosing is super easy and convenient for all ages with the provided dropper top. One dropper (20 drops) provides an adult with a...
  • IMMUNE SYSTEM SUPPORT: Vitamin C is a powerful antioxidant that helps with the body’s natural defenses. Antioxidants are molecules that can aid in...
  • SUPPORTS COLLAGEN PRODUCTION: Vitamin C assists in the manufacture of collagen proteins which help to make new skin and blood vessels. Bioactive form...
  • BIOACTIVE FORM L-ASCORBIC ACID: Ascorbic acid is a water-soluble form of Vitamin C that is of paramount importance to life. Despite its importance,...
  • CLEAN AND SIMPLE INGREDIENTS: Our Vitamin C consists of USP non-gmo L-ascorbic acid, USP non-gmo organic vegetable glycerin and purified water. The...
Bestseller No. 18
Thorne Buffered C Powder - Vitamin C (Ascorbic Acid) with Calcium, Magnesium, and Potassium - 8.32...
  • Easy To Take: The easiest way to take a higher amount of vitamin C
  • Easy On the Stomach: A buffered vitamin C supplement for individuals with a sensitive or compromised digestive system
  • Immune: For immune function and antioxidant support*
  • Collagen/Bones: Helps maintain healthy bones and connective tissue*
  • Free From: Every Thorne product is made with the purest possible ingredients - without gluten or other major allergens (eggs, tree nuts, peanuts)....
SaleBestseller No. 19
Vitamin C 1000mg | 500 Caplets | Ascorbic Acid with Wild Rose Hips | High Strength Formula | Non-GMO...
  • HIGH STRENGTH VITAMIN C: Delivers 1,000 mg of Vitamin C (Ascorbic Acid) in a single caplet
  • VEGETARIAN FORMULA: Designed for a vegetarian lifestyle, made with Rose Hips for added support
  • ROOTED IN WELLNESS: Carlyle provides premium, honest supplements in your pursuit to healthy living
  • CARLYLE MANUFACTURERS: Laboratory Tested, Trusted Ingredients, Superior Quality, 100% Guaranteed!
  • NATURALLY FREE OF: Gluten, Wheat, Yeast, Milk, Lactose, Soy, Artificial Color & Flavoring & NON-GMO
SaleBestseller No. 20
CeraVe Vitamin C Serum with Hyaluronic Acid | Skin Brightening Serum for Face with 10% Pure Vitamin...
  • [ ANTIOXIDANT BENEFITS ] Formulated with 10 percent l-ascorbic acid, the purest form of vitamin C, to help brighten the complexion and promote more...
  • [ HYDRATING SERUM ] Formulated with Hyaluronic Acid to help improve skin tone, texture, and hydration for a healthy looking, radiant complexion.
  • [ LIGHTWEIGHT TEXTURE ] This serum for face has a gel texture with a non-greasy feel. If layering with an eye cream or facial moisturizer, apply...
  • [ 3 ESSENTIAL CERAMIDES ] Ceramides make up 50% of the lipids in the skin barrier. As you age, studies show that ceramide levels decrease. CeraVe...
  • [ DERMATOLOGIST RECOMMENDED ] This formula is fragrance free, paraben-free, non-comedogenic, and allergy tested. CeraVe Skincare is developed with...

Having trouble finding a great Anhydrous L Ascorbic Acid?

This problem is well understood by us because we have gone through the entire Anhydrous L Ascorbic Acid research process ourselves, which is why we have put together a comprehensive list of the best Anhydrous L Ascorbic Acids available in the market today.

After hours of searching and using all the models on the market, we have found the best Anhydrous L Ascorbic Acid for 2023. See our ranking below!

How Do You Buy The Best Anhydrous L Ascorbic Acid?

Do you get stressed out thinking about shopping for a great Anhydrous L Ascorbic Acid? Do doubts keep creeping into your mind?

We understand, because we’ve already gone through the whole process of researching Anhydrous L Ascorbic Acid, which is why we have assembled a comprehensive list of the greatest Anhydrous L Ascorbic Acid available in the current market. We’ve also come up with a list of questions that you probably have yourself.

John Harvards has done the best we can with our thoughts and recommendations, but it’s still crucial that you do thorough research on your own for Anhydrous L Ascorbic Acid that you consider buying. Your questions might include the following:

  • Is it worth buying an Anhydrous L Ascorbic Acid?
  • What benefits are there with buying an Anhydrous L Ascorbic Acid?
  • What factors deserve consideration when shopping for an effective Anhydrous L Ascorbic Acid?
  • Why is it crucial to invest in any Anhydrous L Ascorbic Acid, much less the best one?
  • Which Anhydrous L Ascorbic Acid are good in the current market?
  • Where can you find information like this about Anhydrous L Ascorbic Acid?

We’re convinced that you likely have far more questions than just these regarding Anhydrous L Ascorbic Acid, and the only real way to satisfy your need for knowledge is to get information from as many reputable online sources as you possibly can.

Potential sources can include buying guides for Anhydrous L Ascorbic Acid, rating websites, word-of-mouth testimonials, online forums, and product reviews. Thorough and mindful research is crucial to making sure you get your hands on the best-possible Anhydrous L Ascorbic Acid. Make sure that you are only using trustworthy and credible websites and sources.

John Harvards provides an Anhydrous L Ascorbic Acid buying guide, and the information is totally objective and authentic. We employ both AI and big data in proofreading the collected information.

How did we create this buying guide? We did it using a custom-created selection of algorithms that lets us manifest a top-10 list of the best available Anhydrous L Ascorbic Acid currently available on the market.

This technology we use to assemble our list depends on a variety of factors, including but not limited to the following:

  1. Brand Value: Every brand of Anhydrous L Ascorbic Acid has a value all its own. Most brands offer some sort of unique selling proposition that’s supposed to bring something different to the table than their competitors.
  2. Features: What bells and whistles matter for an Anhydrous L Ascorbic Acid?
  3. Specifications: How powerful they are can be measured.
  4. Product Value: This simply is how much bang for the buck you get from your Anhydrous L Ascorbic Acid.
  5. Customer Ratings: Number ratings grade Anhydrous L Ascorbic Acid objectively.
  6. Customer Reviews: Closely related to ratings, these paragraphs give you first-hand and detailed information from real-world users about their Anhydrous L Ascorbic Acid.
  7. Product Quality: You don’t always get what you pay for with an Anhydrous L Ascorbic Acid, sometimes less, and sometimes more.
  8. Product Reliability: How sturdy and durable an Anhydrous L Ascorbic Acid is should be an indication of how long it will work out for you.

John Harvards always remembers that maintaining Anhydrous L Ascorbic Acid information to stay current is a top priority, which is why we are constantly updating our websites. Learn more about us using online sources.

If you think that anything we present here regarding Anhydrous L Ascorbic Acid is irrelevant, incorrect, misleading, or erroneous, then please let us know promptly!

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FAQ:

Q: What is anhydrous vitamin C (ascorbic acid) serum?

A: Anhydrous Vitamin C (Ascorbic Acid) Serum. Ascorbic acid is notoriously unstable in the presence of water, it quickly oxidizes into dehydroascorbic acid which is yellow/orange in colour and (according to current research) isn’t as effective as ascorbic acid in producing skin benefits like evening of skin tone, reducing free radicals…

Q: What is L-ascorbic acid?

A: L-ascorbic acid is more commonly known as vitamin C. Although many people know that this vitamin is vital for a healthy immune system, few realize what an important ingredient it is for healthy skin.

Q: What happens when you mix ascorbic acid and water?

A: Ascorbic acid is notoriously unstable in the presence of water, it quickly oxidizes into dehydroascorbic acid which is yellow/orange in colour and (according to current research) isn’t as effective as ascorbic acid in producing skin benefits like evening of skin tone, reducing free radicals and reactive oxygen species, and increasing collagen …

Q: What percentage of L-ascorbic acid should be in a topical product?

A: In order to protect the skin from irritation or redness, the topical product should have no more than a 20% concentration of l-ascorbic acid. Ironically, l-ascorbic acid will actually cause the skin to look aged if it is overused.