Frequently Asked Questions

About Our Products

Dr. Rath is a line of skincare products developed through years of scientific research by a biochemistry expert, Asst. Prof. Dr. Rath Pichyangkura, who graduated from Chulalongkorn University with a degree in biochemistry, earning First Class Honors and the first gold medal for biochemistry at Chulalongkorn University. He then went on to study at Michigan State University in the United States. He has more than 30 years of experience in research of molecular biology, enzymology, and biologically active compounds from carbohydrates and oligosaccharides. He is Thailand’s leading expert in chitin-chitosan.

While he studied in America he worked in a research laboratory that focused on phospholipids and lipids in the coverings of cells as well as controlling the expression of genetic materials in high-level organisms. He has more than 50 published works in international journals, many of which rank in the top ten of the world.

Dr. Rath now works with active ingredients derived from sugar that are extremely safe, leave no residue, and are biodegradable and has more than 10 years of experience in creating innovations. He is also a national judge for innovations for various government organizations. With these expertise, Dr. Rath developed a specially formulated chitosan to use in his skincare products that nourish the skin and stimulates the skin cells to result in healthy, glowing skin, including the Dr. Rath Radiance Essence Ex spray and the Dr. Rath Perfect Skin Serum.

From trials and actual experiences of our customers, results can be seen within two weeks, though this will depend on the health of your skin and how you care for your skin.
All of our products have been adjusted for a balanced pH and are suitable for all skin types, whether dry, oily, or combination.
The active ingredients in Dr. Rath products are natural extracts, such as astaxanthin, which is derived from a red seaweed raised by biotechnology, similar to spirulina.
The Dr. Rath Radiance Essence Ex is best for those over the age of 16 who have acne problems. Dr. Rath Perfect Skin Serum is suitable for those over 25 who are worried about wrinkles and want to reduce pigmentation.
There is no product in the world that can be guaranteed not to cause a reaction because each person has a different sensitivity to chemicals and substances. You may already be aware of what you are allergic to or sensitive to so we recommend you carefully read the list of ingredients in each product before purchasing or using it. When it comes to skincare there is often confusion between “allergy” and “irritation.” Most of the time, when someone has a reaction to a skincare product, 80-90% of the time it is an irritation, though it may be misunderstood as an allergy. True allergy only occurs in 10-20% of cases. If an allergic reaction occurs, also known as allergic contact dermatitis, you may be required to undergo allergy testing to find out which ingredient you are allergic to as skincare products tend to have many different ingredients. If you are exposed to something you are allergic to, regardless of where you apply it, you will likely experience symptoms of an allergic reaction, such as hives (itchy or not) or skin redness. If it’s just an irritation, the product may not cause a reaction when applied on the arm, but it will appear immediately when applied on the face. Furthermore, an allergic reaction has nothing to do with the condition of your skin or the concentration of ingredients in the product because regardless of your skin or the amount of allergen, it is your body’s immune system’s response to the allergen. Irritation depends on many factors, such as the health of the skin at the time. Some people will have dry or peeling skin, or have skin that isn’t healthy…may they’ve done a scrub or a laser treatment, or they’ve been in the hot sun unprotected—these factors can make skin more prone to irritation. Sometimes it’s the amount of an ingredient that causes irritation, especially when using multiple products with the same ingredient. The concentration of an ingredient can also affect how a person’s skin reacts to it. The same product with a lower concentration of that ingredient may not irritate the skin at all. Some people think they have sensitive skin, but it is more likely that the skin has not be cared for properly and is fragile, making it prone to irritation. When irritation is confused with allergy, you lose the opportunity to use certain products that can be beneficial for your skin when used correctly. So there is no way to know if a product will cause a reaction unless you try it.
Skin health and skin types vary from person to person so there is no way to guarantee that your skin will not react to a product. We recommend you check the list of ingredients in each product to make sure there isn’t anything you are allergic to. Even though Dr. Rath products have been formulated to be as gentle as possible to suit all skin types, our products will affect each user differently, and some skin may be more sensitive than others. It is always recommended to do a patch test when trying a new product by applying a small amount to the skin of the hand. If you are allergic you will have a reaction to the product with symptoms that may occur in other parts of the body. Irritation is usually due to skin being damaged or thin. As skin health improves, irritation should disappear. Always read the list of ingredients of any product you are going to use and avoid products with ingredients you have previously reacted to.
Dr. Rath is made in Thailand developed by Thai scientists.
Dr. Rath products are developed to be appropriate for all skin types.
Our products cannot make freckles disappear, but can help them fade. Dr. Rath Perfect Skin Serum protects the skin from the sun, which is one cause of freckles. Dr. Rath Radiance Essence Ex helps the freckles fade. Dr. Rath Supercharged Whitening Concentrate also helps freckles and other pigmentation fade. All three of our products make the skin less sensitive to the sun and strengthen the skin, preventing freckles from developing in the future.
For all our products—Dr. Rath Radiance Essence Ex, Dr. Rath Perfect Skin Serum, and Dr. Rath Supercharged Whitening Concentrate—if used twice a day every day, they should last approximately two months.
Overseas all of Dr. Rath’s products are considered cosmeceuticals, but in Thailand there is no law regarding cosmeceuticals so we do not claim our products to be cosmeceuticals. However, when you consider the qualities of our products and the definition of a cosmeceutical, our products can definitely be considered cosmeceuticals.
According to the principles of biology, living things will deteriorate over time. Skincare products can help delay the natural aging process, but once you stop using them, your skin will age at a normal rate without continued care.
All our products have registration numbers from the Food and Drug Administration (FDA). Dr. Rath Radiance Essence Ex 10-1-6200014469 Dr. Rath Perfect Skin Serum 10-1-6200014586 Dr. Rath Supercharged Whitening Concentrate
Once you are in your 40’s, we recommend the serum to reduce wrinkles and protect against the free radicals for healthier skin and to delay the natural aging process. You can use the Dr. Rath Supercharged Whitening Concentrate along with it.
Dr. Rath products do not contain alcohol, parabens, silicones, or sulfates, but the Dr. Rath Perfect Skin Serum does contain perfume and phospholipid oils, which is the same oil in cell membranes, so it does not cause the face to become oily.

There are three Dr. Rath skincare products:
1. Radiance Essence Ex
2. Perfect Skin Serum
3. Supercharged Whitening Concentrate

The Dr. Rath Radiance Essence Ex focuses on skin health and reducing bacteria that causes acne. The active ingredient chitosan oligosaccharides (COS) stimulates the AMPK or energy sensors of the cells for deep molecular changes and prevents irritation and inflammation. Freckles will fade and the skin will be less sensitive to the sun. This product is ideal for acne management and improving skin balance and skin health.

The Dr. Rath Perfect Skin Serum focuses on large pores, premature wrinkles, and uneven skin tone. The active ingredients here are astaxanthin, phospholipids, and hyaluronic acid that reduces wrinkles and pigmentation, prevents freckles, evens out skin tone, and tightens pores. It also improves overall skin health.

The Dr. Rath Supercharged Whitening Concentrate focuses on clear, bright skin, reducing freckles and pigmentation, and hydrating the skin. It does not cause the skin to become sensitive to the sun.

All three of our products have been formulated for the highest effectiveness. Asst. Prof. Dr. Rath Pichyangkura formulated all three products to work together for the best results. You can see improvements in your skin within two weeks.

Yes, all of Dr. Rath’s products are gentle on the skin because we don’t use any alcohol, parabens, or sulfates.
Yes, all of Dr. Rath’s products are gentle on the skin because we don’t use any alcohol, parabens, or sulfates.

Dr. Rath Radiance Essence Ex

From the many years of Asst. Prof. Dr. Rath Pichyangkura’s research, he found that when using chitosan in skincare products, it must be in a specific state to be most effective, and that is as a liquid. Thus, Dr. Rath was developed to be a water-based skincare line with chitosanoligosaccharide as an active ingredient. When used as a spray the product can be applied more thoroughly for the best results.
Chitooligosaccharide (COS) is extracted from the shells of shrimps and crabs and it has both long and short molecular chains. It undergoes up to three manufacturing technologies: chito-technology, nanotechnology, and biotechnology. Because of its natural enzymes, it is purer and 1,000 times smaller than normal chitosan. After more than 20 years of research, it was found that COS has multiple benefits, especially biochemical qualities that reduce the growth of acne-causing bacteria, balance the skin, strengthens skin cells, fades pigmentation, and delays cell aging
Even though chitosan has several benefits, the extraction process is difficult and must be done by an expert biochemist. That is why it’s very difficult to find skincare products that contain chitooligosaccharide as an active ingredient. In Thailand there are only a handful of biochemistry experts so it is rare to find products with chitooligosaccharide here. About 10 years ago there was an attempt to use it with cosmetics, but because it was in a cream form, the chitooligosaccharide could not be fully effective. That’s why Dr. Rath’s Radiance Essence Ex is a spray.
If you are worried about acne or wrinkles, if you have dry skin, or if you have large pores, chitooligosaccharide has been proven through many years of research and trials to treat these issues. The Radiance Essence Ex spray reduces acne and fine lines, hydrates the skin, and improves the bonds between cells for tighter skin and smaller pores. It can magically turn back the hands of time on your skin.
One of the main causes of acne is bacteria. When our face is dry and there is a growth of bacteria, our skin is prone to breaking out. Chitooligosaccharides inhibit the growth of bacteria and in turn reduces acne.
Use in the morning and evening after cleansing face. 1. Hold the Dr. Rath Radiance Essence Ex bottle approximately 20 cm from your face. 2. Spray the essence all over the face. 3. Pat gently to help the essence absorb into the skin. You can also use the product during the day, but always wash your face first. If you spray the product over make-up, the results will not be as effective.
Yes, you can use the Dr. Rath Radiance Essence Ex as Dr. Rath’s products have been formulated to have a pH that is suitable for skin and is gentle on the skin. However, the Dr. Rath Radiance Essence Ex has not been produced as a treatment for Sebderm, but can be used to improve skin health.
While Dr. Rath Radiance Essence Ex does not focus specifically on oily skin, it can reduce some oiliness on your face. It is best for reduce acne and improving skin health. Some of our customers had very thin, fragile skin before using our products, maybe from exfoliating too much, and the Radiance Essence Ex strengthen skin and brings back balance.
The Dr. Rath Radiance Essence Ex can help with acne because the active ingredient COS reduces the bacteria that causes acne. It also helps reduce irritation. The French plankton thermal water is hydrating. Our products are gentle on sensitive skin because there is no alcohol, parabens, silicones, or sulfates in any of our products.
The Dr. Rath Radiance Essence Ex is the best choice because the active ingredient COS reduces bacteria, one of the main causes of acne.
The active ingredient COS in Dr. Rath Radiance Essence Ex reduces the bacteria that causes acne.
Yes, this is normal if your skin is very thin. It should go away pretty quickly.
Yes, the Dr. Rath Radiance Essence Ex is the best choice because the active ingredient COS reduces bacteria, one of the main causes of acne.
The chitooligosaccharide (COS), which is the active ingredient in this product, stimulates the AMPK of cells so they are stronger. The product can help rebalance fragile skin and also help cells repair themselves so skin health is improved.
The Dr. Rath Essence Ex does not focus on whitening the skin, but more on skin health. If you are looking for lighter, brighter skin that isn’t sensitive to the sun, we recommend the Dr. Rath Supercharged Whitening Concentrate.
The Dr. Rath Radiance Essence Ex can be stored for up to two years whether opened or not if stored in less than 40 degrees Celsius.

Dr. Rath Perfect Skin Serum

The serum is orange because of the astaxanthin, which is extracted from a red seaweed. This color is natural. We use the right amount of astaxanthin for the best results.
The oil that our body produces and excretes is similar to a vegetable or animal oil (triglycerides), which is different from the phospholipids in this product. When phospholipids are applied, the cells use this for cell membranes and the product does not cause skin to be oily. These two “oils” are different from each other. You can try applying a little serum to your skin and dab it with a tissue paper. You will notice that there is no oil absorbed into the tissue.
Use it in the morning and evening after the Dr. Rath Radiance Essence Ex. 1. Apply three drops of the serum directly on the face: on the forehead and each cheek. 2. Massage the serum into the skin for about 15 seconds or until it is fully absorbed.
Normally you will notice a difference in your skin in about two weeks, but results vary from person to person, depending on the condition of your skin. If your skin is unhealthy, it may take longer to see the full effects of the product; if you only have mild skin problems, you may see results more quickly. Any skincare product you use, whether a cream or a serum, needs time to produce results. If you have fine lines, pigmentation, or large pores, you will see improvement over time. If you use a product that produces immediate results, it is recommended you check the ingredients of that product because it is not safe for skin to change that quickly and the ingredients may be dangerously concentrated or include steroids. On average the skin cells are shed every 28 days so any treatment will take time and the product must be used continuously for a period of time. When old skin is shed, new skin is nourished immediately. The key is to keep using a product regularly for the best results. Of course, our skin will age with time, but what we aim to do is delay this aging process so you don’t have premature wrinkles. So while it is important to use the appropriate skincare products, you must also adopt other good habits, like getting enough sleep, exercising regularly, avoiding stress, drinking plenty of water, and eating healthy food.
The Dr. Rath Skin Serum does not whiten the skin, but it can brighten and clear the skin. If you would like to lighten your skin tone, it is recommended you use the Dr. Rath Supercharged Whitening Concentrate.
It tightens pores, reduces wrinkles, delays aging, nourishes the skin, and helps the skin look radiant and youthful.
You can always use more hyaluron. Skincare products in the market have different amounts of active ingredients that are absorbed differently. It is important to check the molecular weight of products to understand how well it can be utilized by the skin. HA that weighs more than 10,000 Da cannot be absorbed through the skin and will only provide hydration at the surface of the skin. Dr. Rath’s product’s HA is only 7,000 Da and can be easily absorbed. As for antioxidants, you can always add more to your skincare routine, but it is unnecessary, unless you are using different elements, such as Vitamin C or Vitamin E, which have additional benefits beyond being antioxidants.
The Dr. Rath Perfect Skin Serum lasts three months once opened.
If MLE refers to an encapsulation technique where the active ingredient is placed in multilayered liposome for better transmission, this is not a new technique. Dr. Rath Perfect Skin Serum is similar, but doesn’t use the encapsulation technique because the active ingredients in the serum has been innovated for deep molecular absorption.
The Dr. Rath Perfect Skin Serum can reduce the depth of pockmarks, but if your scars are very deep, it may be necessary to see a doctor. The serum on its own may not be as effective as combined treatments.
If the lines are deep, the serum on its own will not make them disappear. The serum may help make the lines shallower and will delay future wrinkles.
Yes, the serum works well to treat dark spots.
Our serum doesn’t work to shrink pores as much as it does to fill these pores up by strengthening the skin cells. We don’t use any ingredients to make the face muscles contract as found in many other skincare products. Dr. Rath Perfect Skin Serum solves the problem at its cause and makes skin healthier and more youthful, and pores are smaller as a result.
Our serum absorbs easily and quickly into the skin, but will not dry your skin. The reason you don’t feel anything on your skin after the application is because the serum has been absorbed; it has not evaporated.
If unopened, can be stored at less than 30 degrees Celsius for up to two years. When opened it will only last three months in room temperature and six in the refrigerator. Once opened oxygen will interact with the Astaxanthin to slowly dissolve it. Always close the lid tightly after use and store at no more than 30 degrees Celsius to maintain quality of the product. If used daily, it does not need to be stored in the refrigerator.

Dr. Rath Supercharged Whitening Concentrate

It is a natural smell of the ingredients. We do not add any perfume to our products as this can irritate the skin.
This is because the products don’t mix well together, causing a reaction. If you use an oil-based sunscreen, it will not mix with our water-based products. Please avoid using this sunscreen, especially at night.
If you have thin, fragile skin, especially if you’ve undergone laser treatment or exfoliating, the product can cause a slight burning sensation.
Use in the morning and evening after the Dr. Rath Perfect Skin Serum. 1. Squeeze the product onto your ring finger. 2. Apply the product all over your face by rubbing upwards.
If unopened, can be stored for up to two years at less than 30 degrees Celsius. Once opened it is good for three months in room temperature and six months in the refrigerator.