The Grandpa Soap Co. Thylox Acne Treatment Bar Soap
A face cleanser with 10 ingredients.
This sulfur foaming cleanser is formulated around Sulfur to clear breakouts.
Worth noting
Contains EU-listed fragrance allergens, including Jasminum Officinale Oil and Cananga Odorata Leaf Oil.
We independently verify ingredients, backed by peer-reviewed research. Suggest an update.
What's inside
Ingredients List
Sulfur 3%
Antiseborrhoeic
Sodium Palmate
CleansingSodium Cocoate/Sodium Palm Kernelate
Water
Skin ConditioningGlycerin
Humectant
Active Ingredients:
Sulfur 3%
Inactive Ingredients:
Sodium Palmate, Sodium Cocoate/Sodium Palm Kernelate, Water, Glycerin, Jasminum Officinale Oil, Cananga Odorata Leaf Oil, Glycine Soja Oil, Sodium Chloride, Sodium Gluconate
Benefits
Concerns
Ingredients Explained
Sulfur is one of skincare's oldest ingredients that has been used to treat acne, rosacea, seborrheic dermatitis, scabies, and tinea versicolor.
How does it work?
When sulfur touches skin, it reacts with an amino acid in skin cells (called cysteine) to create cystine and hydrogen sulfide.
That hydrogen sulfide helps loosen dead skin cells to exfoliate. And here's a geeky detail: the smaller the Sulfur particles, the more they interact with skin and the better they work.
Sulfur also has antifungal and antibacterial activity, which is why you'll see it in both acne treatments and dandruff shampoos.
In the US, acne products can use 3-10% sulfur while dandruff products use 2-5%. It's also often paired with Sodium Sulfacetamide, and using that combo twice daily for 12 weeks reduced inflammatory acne spots by about 80%.
The most common complains are the smell and dryness. Otherwise, side effects are uncommon.
If you have a "sulfa" allergy, that's an allergy to sulfonamide drugs and this doesn't mean you'll react to elemental sulfur.
A 1972 study suggested sulfur might clog pores. Elemental sulfur caused some clogged pores on rabbit ears and human backs (though the researchers noted the effect was mild).
A 1978 follow-up tested this on 52 people. After six weeks of patches with 5% Sulfur, skin biopsies showed no link between Sulfur and clogged pores. The surprise? The base the Sulfur was mixed into was what caused clogged pores. Later reviewers also noted that other studies couldn't repeat the 1972 results.
So why does Sulfur have a comedogenic rating of 3?
That number comes from a 1989 rabbit ear study by dermatologist James Fulton, which gave a 3 to water-soluble sulfur specifically. Even so, a 3 isn't a big red flag. Fulton's own scale treats 2 to 3 as borderline.
Human testing has also proved that any finished product with a comedogenic ingredient won't automatically make you break out; it really comes down to concentration, formula, and your skin.
Learn more about SulfurSodium Palmate is a surfactant and used to saponify fatty acids. It can be derived from palm oil or synthetically created.
As a surfactant, it helps lift dirt and oil off the skin to be cleansed.
Sodium Palmate is also used during the soap-making process to saponify fatty acids. This helps soap creates bubbles without leaving residue on the skin.
This ingredient is sometimes called saponified palm oil.
Learn more about Sodium PalmateThis is not an INCI ingredient.
Read more about Sodium Cocoate or Sodium Palm Kernelate.
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. Remember to stay hydrated!
Learn more about WaterGlycerin (or glycerol) is a compound naturally found in your skin. It's a powerhouse humectant that pulls water into the stratum corneum.
Topically, glycerin does several things at once:
Your skin makes glycerin on its own (mostly from sebaceous oil breakdown) and shuttles it to your outermost layer of skin, or your epidermis, via aquaporin-3.
Aquaporin-3 is a transporter that is essential for normal skin hydration, elasticity, and repair. Interestingly, mice lacking in AQP3 have dry and less elastic skin that can be fully corrected with glycerin.
This ingredient is non-irritating, plays well with almost every ingredient, and works across all skin types. Typical use is anywhere between 3-10% but can go up to 79% in some leave-on products.
Just know very high concentrations (>40%) can feel tacky in low humidity.
Glycerin is the name for this ingredient in American English. British English uses Glycerol/Glycerine.
Learn more about GlycerinJasminum Officinale Oil is obtained from the jasmine flower. The flower has antioxidant and antimicrobial properties.
The antioxidant properties of Jasmine flower come from flavonoids.
YSK - Jasmine flowers also contain coumarin, a known EU allergen.
Learn more about Jasminum Officinale OilCananga Odorata Leaf Oil is a fragrance and is an oil. It can cause irritation.
Glycine Soja Oil is a plant-derived oil from soybean seeds. Like other oils, it is rich in essential fatty acids (mostly linoleic and oleic) that support skin hydration and barrier function.
The fatty acids are able to integrate into the lipid matrix of the stratum corneum to help soften skin and reduce water loss.
On top of that, soybean oil is rich in vitamins like vitamin E, a potent antioxidant.
Research on soybean's active components also point to anti-inflammatory, collagen-stimulating, antioxidant activity, and protection against UV-induced oxidative damage.
Most of this research applies to the broader soybean plant and not just the oil fraction alone.
This ingredient does carry a comedogenic rating of 3 from the old rabbit-ear assay. Just remember testing finished products in humans showed that formulas built with "comedogenic" ingredients are not necessarily comedogenic themselves. It's worth patch testing if you're breakout prone, and always listen to your skin.
Because this ingredient is a saturated triglyceride, it may not be fungal acne safe. This is because Malassezia breaks down sebum triglycerides into fatty acids it can consume, making this ingredient a possible source for the yeast.
Learn more about Glycine Soja OilChances are, you eat sodium chloride every day. Sodium Chloride is also known as table salt. This ingredient has many purposes in skincare: thickener, emulsifier, and exfoliator.
You'll most likely find this ingredient in cleansers where it is used to create a gel-like texture. As an emulsifier, it also prevents ingredients from separating.
You might see people debate whether Sodium Chloride is comedogenic, but there actually haven't been any comedogenic tests done on it. Either way, the overall formulation of a product matters a lot more than any single ingredient.
You might see this ingredient used in scrubs as a primary exfoliating ingredient.
Learn more about Sodium ChlorideSodium Gluconate is the sodium salt of gluconic acid. In skincare, its main job is as a chelator.
Chelators grab onto stray metal ions like iron and copper that sneak in through water, raw materials, or manufacturing equipment. This stops them from triggering reactions that cause oils to go rancid, formulas to change color, and actives like vitamin C to fall apart.
This ingredient is often chosen as a biodegradable, gentler-sounding alternative to EDTA. It also pulls double duty as a mild humectant and pH buffer.
Typical use levels sit around 0.1-1% and supplier documents list up to 10% as an acceptable ceiling. Industry data found this ingredient family is mostly used well below 1% in leave on products.
Allergy risk is very low; animal testing has found it to be non-irritating to skin and eyes, mutagenicity assays came back negative, and there are no published reports of allergic contact dermatitis to it.
Learn more about Sodium GluconateReviews
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Where it's from
The Grandpa Soap Co. is a American brand
We're dedicated to providing you with the most up-to-date and science-backed ingredient info out there.
The data we've presented on this page has been verified by a member of the SkinSort Team.
Read more about us· Updated January 29, 2026 • Added by smallsnow
