Tula Skincare Brightening Treatment Drops Triple Vitamin C Serum Versus Olehenriksen Truth Serum
Updated on June 05, 2025
Overview
What they are
These products are both cruelty-free and reef safe serums. They have a total of 6 ingredients in common
Cool Features
They both contain AHA and Vitamin C
Suited For
They're both likely to be good for anti aging, dry skin, brightening skin, sensitive skin, oily skin, reducing pores, scar healing, dark spots and better texture
Free From
They both do not contain any harsh alcohols, oils, parabens or sulfates
What's Inside
They both contain fragrances
We independently verify ingredients, and our claims are backed by peer-reviewed research. Spot a product that needs an update? Let us know.
Ingredient Info
Tula Skincare Brightening Treatment Drops Triple Vitamin C Serum 38 ingredients
Olehenriksen Truth Serum 37 ingredients
What's inside (and what isn't)
What's inside (and what isn't)
At a glance
Click on any of the items below to learn more
Tula Skincare Brightening Treatment Drops Triple Vitamin C Serum 38 ingredients
Olehenriksen Truth Serum 37 ingredients
Key Ingredients
Benefits
Concerns
Key Ingredients
Benefits
Concerns
Ingredients Side-by-side
Water
Skin Conditioning3-O-Ethyl Ascorbic Acid
Skin Conditioning
Lactococcus Ferment Lysate
Skin ConditioningPropanediol
Solvent
1,2-Hexanediol
Skin Conditioning
Ascorbyl Glucoside
Antioxidant
Sodium Citrate
BufferingPentylene Glycol
Skin ConditioningCichorium Intybus Root Extract
MaskingMelia Azadirachta Leaf Extract
Skin ConditioningMelia Azadirachta Flower Extract
Skin ConditioningCorallina Officinalis Extract
Skin Conditioning
Curcuma Longa Root Extract
Masking
Ocimum Basilicum Flower/Leaf Extract
TonicLactic Acid
Buffering
Ocimum Sanctum Leaf Extract
Skin Conditioning
Vaccinium Vitis-Idaea Fruit Extract
Antioxidant
Citrus Unshiu Peel Extract
MaskingHippophae Rhamnoides Fruit Extract
Skin Conditioning
Litchi Chinensis Seed Extract
Skin ConditioningMangifera Indica Leaf Extract
Skin ConditioningGold
Cosmetic ColorantGlutathione
Hydroxyacetophenone
Antioxidant
Acetyl Cysteine
Antioxidant
Sodium Sulfite
Preservative
Sorbitol
Humectant
Citric Acid
Buffering
Sclerotium Gum
Emulsion StabilisingXanthan Gum
EmulsifyingCaprylyl Glycol
EmollientAscorbic Acid
Antioxidant
Sodium Phytate
Lecithin
Emollient
Pullulan
Silica
Abrasive
Sodium Chloride
Masking
Sodium Benzoate
Masking
Water, 3-O-Ethyl Ascorbic Acid, Lactococcus Ferment Lysate, Propanediol, 1,2-Hexanediol, Ascorbyl Glucoside, Sodium Citrate, Pentylene Glycol, Cichorium Intybus Root Extract, Melia Azadirachta Leaf Extract, Melia Azadirachta Flower Extract, Corallina Officinalis Extract, Curcuma Longa Root Extract, Ocimum Basilicum Flower/Leaf Extract, Lactic Acid, Ocimum Sanctum Leaf Extract, Vaccinium Vitis-Idaea Fruit Extract, Citrus Unshiu Peel Extract, Hippophae Rhamnoides Fruit Extract, Litchi Chinensis Seed Extract, Mangifera Indica Leaf Extract, Gold, Glutathione, Hydroxyacetophenone, Acetyl Cysteine, Sodium Sulfite, Sorbitol, Citric Acid, Sclerotium Gum, Xanthan Gum, Caprylyl Glycol, Ascorbic Acid, Sodium Phytate, Lecithin, Pullulan, Silica, Sodium Chloride, Sodium Benzoate
Water
Skin ConditioningGlycerin
Humectant
Oleth-20
CleansingSodium Ascorbyl Phosphate
Antioxidant
Hydroxyethylcellulose
Emulsion StabilisingPhenoxyethanol
Preservative
Caprylyl Glycol
EmollientHexylene Glycol
EmulsifyingCitric Acid
Buffering
Parfum
Masking
PEG-12 Dimethicone
Skin Conditioning
Tocopheryl Acetate
Antioxidant
Aroma
Hydrolyzed Vegetable Protein
Skin ConditioningDisodium Phosphate
BufferingPolysorbate 60
Emulsifying
Aloe Barbadensis Leaf Extract
Emollient
Citrus Aurantium Dulcis Fruit Extract
MaskingSodium Hyaluronate
Humectant
Thioctic Acid
Antioxidant
Calcium Ascorbate
Antioxidant
Sodium Phosphate
BufferingSorbitol
Humectant
Citrus Grandis Seed Extract
Astringent
Sodium Benzoate
Masking
Ascorbic Acid
Antioxidant
Camellia Sinensis Leaf Extract
Antimicrobial
Euphrasia Officinalis Extract
AntimicrobialRosa Canina Fruit Extract
Astringent
Leuconostoc/Radish Root Ferment Filtrate
Antimicrobial
Potassium Sorbate
Preservative
Triacetin
AntimicrobialSodium Benzotriazolyl Butylphenol Sulfonate
UV AbsorberBenzyl Benzoate
Antimicrobial
Limonene
Perfuming
Linalool
Perfuming
CI 15985
Cosmetic ColorantWater, Glycerin, Oleth-20, Sodium Ascorbyl Phosphate, Hydroxyethylcellulose, Phenoxyethanol, Caprylyl Glycol, Hexylene Glycol, Citric Acid, Parfum, PEG-12 Dimethicone, Tocopheryl Acetate, Aroma, Hydrolyzed Vegetable Protein, Disodium Phosphate, Polysorbate 60, Aloe Barbadensis Leaf Extract, Citrus Aurantium Dulcis Fruit Extract, Sodium Hyaluronate, Thioctic Acid, Calcium Ascorbate, Sodium Phosphate, Sorbitol, Citrus Grandis Seed Extract, Sodium Benzoate, Ascorbic Acid, Camellia Sinensis Leaf Extract, Euphrasia Officinalis Extract, Rosa Canina Fruit Extract, Leuconostoc/Radish Root Ferment Filtrate, Potassium Sorbate, Triacetin, Sodium Benzotriazolyl Butylphenol Sulfonate, Benzyl Benzoate, Limonene, Linalool, CI 15985
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
Ascorbic Acid is is pure Vitamin C. This form makes up the largest amount of vitamin C found naturally in our skin.
Not only is vitamin C great for your overall health and immune system, it also has plenty of benefits on your skin.
Vitamin C is best used for brightening skin. It improves dark spots, acne scars, and hyperpigmentation. This is because it blocks the process of skin darkening when exposed to UV.
Remember: Vitamin C should not replace sunscreen!
Your skin uses vitamin C to build collagen. Collagen is one key component in having a strong skin barrier and plump skin. Vitamin C also plays a role in regulating collagen, thus making it effective in improving wrinkles and fine lines.
Ascorbic acid shows potent antioxidant activity. As an antioxidant, it helps fight free-radicals. Free-radicals are molecules that may damage your skin cells. These antioxidants also protect skin against UV damage.
The best formulations include Vitamin E and/or ferulic acid. These two ingredients help stabilize and provide a boost in the benefits of ascorbic acid. This is because ascorbic acid becomes unstable when exposed to UV and air. In fact, you can tell your ascorbic acid has oxidized when it turns an orange-yellow color.
Ascorbic acid is generally compatible with other ingredients. However, using ascorbic acid with other active ingredients might cause irritation. Two ingredients: copper ions and benzoyl peroxide, will inactivate ascorbic acid completely.
Read more about other types of Vitamin C:
Foods rich with vitamin C include oranges, strawberries, broccoli, bell peppers, and more. When consuming Vitamin C, your skin receives a portion of the nutrients.
Learn more about Ascorbic AcidCaprylyl Glycol is a humectant and emollient, meaning it attracts and preserves moisture.
It is a common ingredient in many products, especially those designed to hydrate skin. The primary benefits are retaining moisture, skin softening, and promoting a healthy skin barrier.
Though Caprylyl Glycol is an alcohol derived from fatty acids, it is not the kind that can dry out skin.
This ingredient is also used as a preservative to extend the life of products. It has slight antimicrobial properties.
Learn more about Caprylyl GlycolCitric Acid is an AHA derived from citrus fruits (think oranges, lemons, and limes!).
As an AHA, Citric Acid removes the top layer of skin cells from the newer layer of skin underneath. This helps skin to remove dark spots and even out skin tone.
If you spot Citric Acid near the end of an ingredient list, it's likely there as a pH adjuster rather than an active ingredient.
Read more about some other popular AHA's here:
Learn more about Citric AcidSodium Benzoate is a preservative. It's used in both cosmetic and food products to inhibit the growth of mold and bacteria. It is typically produced synthetically.
Both the US FDA and EU Health Committee have approved the use of sodium benzoate. In the US, levels of 0.1% (of the total product) are allowed.
Sodium benzoate works as a preservative by inhibiting the growth of bacteria inside of cells. It prevents the cell from fermenting a type of sugar using an enzyme called phosphofructokinase.
It is the salt of benzoic acid. Foods containing sodium benzoate include soda, salad dressings, condiments, fruit juices, wines, and snack foods.
Studies for using ascorbic acid and sodium benzoate in cosmetics are lacking, especially in skincare routines with multiple steps.
We always recommend speaking with a professional, such as a dermatologist, if you have any concerns.
Learn more about Sodium BenzoateSorbitol is a sugar alcohol. It is a hydrating and moisturizing agent created from the reduction process of glucose.
Most sorbitol is usually made from potato starch. It is also found in fruits such as apples and pears.
As a humectant, Sorbitol helps draw water to the skin. This helps keep the skin hydrated. Sorbitol also helps create a thicker texture in products. You might find sorbitol in your toothpaste and other gels.
It is a non-irritating ingredient that is great for those with dry skin.
Sorbitol is a prebiotic. It helps promote the growth of healthy bacteria on your skin. The bacteria on your skin form a microbiome. This microbiome helps protect your skin from infection and harmful bacteria.
Learn more about SorbitolWater. It's the most common cosmetic ingredient of all. You'll usually see it at the top of ingredient lists, meaning that it makes up the largest part of the product.
So why is it so popular? Water most often acts as a solvent - this means that it helps dissolve other ingredients into the formulation.
You'll also recognize water as that liquid we all need to stay alive. If you see this, drink a glass of water. Stay hydrated!
Learn more about WaterIngredient Ratings
Here's what our community thinks of the ingredients in these products.
When to use
Tula Skincare Brightening Treatment Drops Triple Vitamin C Serum 38 ingredients
Olehenriksen Truth Serum 37 ingredients
