Secret Key Starting Treatment Essence Versus Haruharu Wonder Black Rice Hyaluronic Toner
Updated on March 31, 2025
Overview
What they are
These products are both reef safe . They have a total of 8 ingredients in common
Cool Features
They both contain hyaluronic acid
Suited For
They're both likely to be good for anti aging, dry skin, brightening skin, sensitive skin, scar healing and dark spots
Free From
They both do not contain any parabens, silicones 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
Secret Key Starting Treatment Essence 35 ingredients
Haruharu Wonder Black Rice Hyaluronic Toner 28 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
Secret Key Starting Treatment Essence 35 ingredients
Haruharu Wonder Black Rice Hyaluronic Toner 28 ingredients
Benefits
Concerns
Benefits
Concerns
Ingredients Side-by-side
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
Water. 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 WaterGlycerin is already naturally found in your skin. It helps moisturize and protect your skin.
A study from 2016 found glycerin to be more effective as a humectant than AHAs and hyaluronic acid.
As a humectant, it helps the skin stay hydrated by pulling moisture to your skin. The low molecular weight of glycerin allows it to pull moisture into the deeper layers of your skin.
Hydrated skin improves your skin barrier; Your skin barrier helps protect against irritants and bacteria.
Glycerin has also been found to have antimicrobial and antiviral properties. Due to these properties, glycerin is often used in wound and burn treatments.
In cosmetics, glycerin is usually derived from plants such as soybean or palm. However, it can also be sourced from animals, such as tallow or animal fat.
This ingredient is organic, colorless, odorless, and non-toxic.
Glycerin is the name for this ingredient in American English. British English uses Glycerol/Glycerine.
Learn more about GlycerinButylene Glycol (or BG) is used within cosmetic products for a few different reasons:
Overall, Butylene Glycol is a safe and well-rounded ingredient that works well with other ingredients.
Though this ingredient works well with most skin types, some people with sensitive skin may experience a reaction such as allergic rashes, closed comedones, or itchiness.
Learn more about Butylene Glycol1,2-Hexanediol is a synthetic liquid and another multi-functional powerhouse.
It is a:
- Humectant, drawing moisture into the skin
- Emollient, helping to soften skin
- Solvent, dispersing and stabilizing formulas
- Preservative booster, enhancing the antimicrobial activity of other preservatives
Ginseng Root helps increase skin hydration, soothe skin, even out skin tone, and improve the appearance of wrinkles.
This ingredient helps improve blood circulation and oxygen flow while giving skin a boost in nutrients. Ginseng root contains both Vitamin D and B12. Both of these vitamins help boost collagen production in your skin. Collagen gives you skin the appearance of looking plump and firm.
Studies also show ginseng may help with hyperpigmentation. Ginseng disrupts the production of tyrosinase, an enzyme that starts the process of skin darkening.
Historically, people in East Asia have used ginseng as both food and medicine.
Learn more about Panax Ginseng Root ExtractZanthoxylum Piperitum Fruit Extract comes from the Japanese Pepper, also known as the Prickly Ash. This plant is native to the Korean peninsula and Japan.
The pepper has antioxidant properties. It may help reduce the signs of aging.
For those with fragrance sensitivities, Zanthoxylum Piperitum Fruit Extract contains limonene.
If you have concerns, we recommend speaking with a professional about using this ingredient.
The Japanese Pepper is related to the Sichuan Pepper.
Learn more about Zanthoxylum Piperitum Fruit ExtractOryza Sativa Extract comes from the rice grain, Oryza sativa. Rice extract has wound healing, antioxidant, anti-inflammatory, and hydrating properties.
Rice grains contain numerous antioxidants which may help with anti-aging, such as vitamin E. Antioxidants help stabilize free-radical molecules. Unstable free-radical molecules may damage your skin cells and accelerate signs of aging.
A study from 2002 found rice to help increase the rate of wound healing. The same study found an improvement of skin barrier function in the patients after taking rice baths.
Numerous in-vitro studies have found rice water to help decrease sun damage by increasing collagen production and inhibiting the process of tyrosinase.
Long story short- tyrosinase is an enzyme that controls melanin production. Our bodies start producing melanin (AKA tanning) when exposed to UV radiation to protect against damage. Rice water is found to partially block this process.
Though more research is needed on rice's ability to help with UV protection, recent studies seem promising.
Wondering why rice is hydrating? The protein in rice have emollient properties. Emollients create a barrier on the skin to trap moisture in, keeping your skin moisturized.
Some rice extract may have mildly-exfoliating properties. These are mainly limited to Oryza Sativa (Rice) Bran and Oryza Sativa (Rice) Germ Powder.
This rice was first cultivated in China over 10,000 years ago. Many cultures throughout Asia have used rice water on skin and hair for centuries.
Learn more about Oryza Sativa ExtractHyaluronic acid is naturally found in healthy skin. It is a humectant, meaning it draws moisture to your skin.
This ingredient helps hydrate, soothe, and protect the skin.
What makes hyaluronic acid so hydrating? It has the capacity to bind or hold large amounts of water.
Fun fact: It is already naturally found in our bodies, such as the fluids of our eyes and our joints.
Studies find this ingredient to have anti-inflammatory and anti-microbial properties. This can help speed up wound-healing.
Hyaluronic acid can be irritating if the molecule has a low-molecular weight, or if the molecules are small.
One study found low-molecular weight hyaluronic acid to be pro-inflammatory, meaning some people may experience irritation. This is because our bodies use hyaluronic acid in the wound-healing process to signal to our bodies, via irritation, that something needs healing.
The same study found high-molecular weight hyaluronic acid to be anti-inflammatory.
These are some other common types of Hyaluronic Acid:
Learn more about Hyaluronic AcidIngredient Ratings
Here's what our community thinks of the ingredients in these products.
When to use
Secret Key Starting Treatment Essence 35 ingredients
Haruharu Wonder Black Rice Hyaluronic Toner 28 ingredients

Reviews
Here's what our community thinks
Secret Key Starting Treatment Essence 35 ingredients
Haruharu Wonder Black Rice Hyaluronic Toner 28 ingredients
Would marry this product.
Hydrating & moisturizing at the same time. If I have a small breakout it would be gone in 3 days max, sometimes even the next day. After focusing on hydration my skin doesn't suffer from hormonal acne anymore.
I loved how this toner/essence felt on my skin!! Just the right consistency, just the right glow…
But; I recently discovered that fermented ingredients (and their function) ABSOLUTELY increased the terrible eruption that occurred on my face. I’m sensitive to the fermented ingredients :/. It’s what makes so many of the Korean skincare products so very effective, and now I have to purge hundreds Show more