Blog
October 26th, 2024 by Dr. Hannah Sivak
…and I am still trying to work out an answer Hannah Dear Dr. Sivak,Your exit from Skin Actives was definitely a surprise, but, I get it.You are staying true to your heart and passions.I just want you to know how much you improved the life of a nurse, a wife, a daughter. In 2004, I was diagnosed with melasma, none of the prescribed treatment worked, and after months of searching, found one line of products I could use on my sensitive face. You see, I’m a nurse, and I worked with patients, doctors, and the public daily. And, after always having very good skin, and rarely wearing makeup, I…
October 23rd, 2024 by Dr. Hannah Sivak
https://covalo.com/ is a company that helps other companies bring goods to the market. They invited me to a podcast that will be edited and published soon on Spotify. In the meantime, I wish to thank Anna Lorentz for her thoughtful questions. Here are my written responses to Anna’s questions, but the responses in the actual podcast will differ. Questions by Covalo to Dr. Hannah Sivak: For our listeners who might not be aware, what exactly are growth factors, and how do they function in the skin? Growth factors are proteins in our body that stimulate cellular division and differentiation. They bind to specific receptors on cell surfaces and are essential…
October 21st, 2024 by Dr. Hannah Sivak
Por medio de hannahsivak.com, suministramos varias proteínas activas a la industria cosmética, pero el factor de crecimiento epidérmico sintético humano es particularmente apreciado por nosotros. ¿Por qué? Por razones históricas. En 1986, Stanley Cohen y Rita Levi-Montalcini recibieron el Premio Nobel por su trabajo para esclarecer el papel de los factores de crecimiento en la regulación del crecimiento y el desarrollo celular. Esta pequeña proteína (sólo 53 aminoácidos) potenciaba el crecimiento epidérmico y la queratinización. Los trabajos de Cohen y sus colaboradores demostraron que el EGF estimulaba de forma directa la proliferación de las células epidérmicas, y que esta acción estimuladora del EGF no dependía de otras influencias sistémicas u…
October 18th, 2024 by Dr. Hannah Sivak
Desde que me desvinculé de mi anterior empresa, me estoy centrando en suministrar proteínas activas a la industria cosmética. Estoy introduciendo una nueva categoría en el blog, «¿Qué proteína?», donde se ponen de relieve las diferentes proteínas que suministramos y lo que pueden hacer por la piel y el cuero cabelludo. Para más información sobre catálogos y precios, escríbanme. Hannahinfo arroba hannahsivak punto com En HannahSivak.com, aprovechamos nuestra amplia experiencia científica para desarrollar ingredientes bioidénticos avanzados para el cuidado personal. Vendemos estos ingredientes y ofrecemos asesoramiento para crear los productos más eficaces del mundo para el cuidado de la piel y el cabello.Estos ingredientes potencian los mecanismos naturales de defensa…
October 18th, 2024 by Dr. Hannah Sivak
At hannahsivak.com, we supply several active proteins to the cosmetic industry, but the human synthetic epidermal growth factor is especially dear to us. Why? For historical reasons. In 1986, Stanley Cohen received the Nobel Prize for his work elucidating the role of EGF in regulating cell growth and development. This small protein (only 53 amino acids) enhanced epidermal growth and keratinization. Work by Cohen and his collaborators demonstrated that EGF directly stimulated the proliferation of epidermal cells, and this stimulatory action of EGF did not depend on other systemic or hormonal influences. Cells that respond to EGF do so because they have receptors on the cell membrane that recognize the…
October 16th, 2024 by Dr. Hannah Sivak
At HannahSivak.com, we leverage our extensive scientific expertise to develop advanced bio-identical ingredients for personal care. We sell these ingredients and provide consulting advice on creating the world’s most effective skin and hair care products. These ingredients boost the body’s natural defense and repair mechanisms, helping your customers regain and retain the natural beauty of their skin and hair safely and sustainably. Note: We do not use transgenic plants (the European Union and several countries prohibit their cultivation) because we care about the environment. Proteins in stock We supply proteins as a suspension to be stored refrigerated. We provide advice on formulation, including how to preserve the protein’s activity until…
October 16th, 2024 by Dr. Hannah Sivak
After leaving my previous company, I am concentrating on supplying active proteins to the cosmetic industry. I am introducing a new blog category, “Which Protein,” highlighting the different proteins we supply and what they can do for the skin and scalp. Write to me for catalog and pricing information. Hannah info at hannahsivak dot com
October 15th, 2024 by Dr. Hannah Sivak
¿Qué significa este premio? La ciencia es un proceso. Aprendemos mientras investigamos, y la vida es complicada. Cuando entré en la universidad en 1966, ni siquiera tenía en claro cuántos cromosomas había en una célula humana. Tal vez fuera porque los viejos libros de texto aún circulaban con el antiguo número, 48. En realidad, Joe Hin Tjio y Albert Levan señalaron en 1956 que el número correcto de cromosomas humanos era 46, no 48, como supuestamente se había establecido unas tres décadas antes. Los libros de texto están llenos de errores. La regulación de los genes determina las diferencias entre tipos de células y, si se desvía del camino correcto,…
October 15th, 2024 by Dr. Hannah Sivak
Los científicos llevan más de 50 años luchando por resolver lo que se llamó «el problema del plegamiento de las proteínas». Las proteínas son complicadas, y dilucidar su estructura para entender cómo funcionan solía llevar décadas e incluso más tiempo. Esto sigue siendo cierto, pero la IA ha sido de gran ayuda. ¿Por qué es importante el plegamiento de las proteínas? Podemos pensar que el ADN es complicado, pero no lo es tanto como una proteína. El ADN, sea cual sea su origen y secuencia, se pliega en el espacio de forma similar, como demostraron Watson, Crick y Wilkins (Premio Nobel de Fisiología o Medicina en 1962, Rosalind Franklin z”l…
October 15th, 2024 by Dr. Hannah Sivak
Por favor, no compres las ediciones anteriores de mis libros. Pronto tendremos lista una versión con recetas sencillas y actualizadas para que puedas prepararlas en casa. Este será el primer esfuerzo editorial de mi carrera post-Skin Actives, ¡una visión más madura y realista de la ciencia post-normal de la piel! Hannah Traducido por la Dra Cecilia Hidalgo
October 9th, 2024 by Dr. Hannah Sivak
Scientists have struggled for more than 50 years to solve what was called “the protein folding problem.” Proteins are complicated, and elucidating their structure used to take decades and even longer to understand how they work. That is still true, but AI has been helpful. Why is protein folding important? We may think DNA is complicated, but it’s not as complicated as a protein. DNA, whatever its origin and sequence, folds in space in a similar manner, as shown by Watson, Crick and Wilkins (1962 Nobel Prize in Physiology or Medicine, Rosalind Franklin had already died). Remember the double helix? Now look at those pretty models of proteins you see…
October 7th, 2024 by Dr. Hannah Sivak
What does it mean? Science is a process. We learn as we research, and life is complicated. When I started college in 1966, it wasn’t even clear to me how many chromosomes there were in a human cell. Maybe it was because old textbooks still circulated with the old number, 48. Actually, Joe Hin Tjio and Albert Levan reported in 1956 that the correct human chromosome number was 46, not 48, as was supposedly established some three decades earlier. Textbooks are full of errors. Gene regulation determines differences between types of cells, and if it goes off track, it can lead to diseases such as cancer, diabetes, or autoimmunity. Researchers…
September 29th, 2024 by Dr. Hannah Sivak
Please don’t buy the old editions of my books. We will soon have ready a version with simple, updated recipes for you to make at home. This will be the first editorial effort of my post-Skin Actives career, a more mature and realistic view of post-normal skin science! Hannah
September 25th, 2024 by Dr. Hannah Sivak
Please note that I am no longer at Skin Actives. I have no connection to the new owners. Thank you Hannah Sivak
September 7th, 2024 by Dr. Hannah Sivak
Los aceites se han convertido en objeto de exageración en la publicidad sobre el cuidado de la piel, al igual que otros ingredientes. Esto no importaría mucho si no fuera porque distintos aceites pueden tener efectos diferentes en tu piel. ¿Cómo elegir un buen aceite para tu piel?1. Pensá en nutrir tu piel y NO en las bacterias del acné.2. ¿Buscás aliviar una afección cutánea como el eccema?3. Lo que le importa a tu piel es la composición en ácidos grasos y NO lo bonito que pueda ser el nombre de la planta.4. Un aceite puede contener impurezas beneficiosas, pero algunas impurezas pueden desprender un olor fuerte. Yo prefiero usar…
September 1st, 2024 by Dr. Hannah Sivak
Oils have become an object of advertising hype in skincare, just like other ingredients. This would not matter much except that different oils can have different effects on your skin. How to choose a good oil for your skin? Think about nourishing your skin and NOT the acne bacteria. Are you looking to alleviate a skin condition like eczema? What matters to your skin is the fatty acid composition and NOT how pretty the name of the plant might be. An oil may contain some beneficial impurities, but some impurities may impart a strong odor. I prefer to use purified oils and add extras as needed. You will be using…
August 23rd, 2024 by Dr. Hannah Sivak
¡Hemos recorrido un largo trayecto! Hicimos un gran trabajo, diseñamos y fabricamos excelentes productos para la piel, y mejoramos muchas vidas (incluida la mía, durante y despuésde un tratamiento contra el cáncer y varias cirugías en curso). El de Skin Actives ha sido el trabajo más largo de mi vida, incluso más largo que mi trabajo de investigación en Inglaterra y Michigan. Ahora ha llegado el momento de decir adiós y, por supuesto, duele, aunque todavía queda mucho por hacer. Sigan atentos a mi blog, continuaré publicando, y encontraréla manera de comunicarme con ustedes, recibir preguntas y responderlas. Hannah Traducido por la Dra. Cecilia Hidalgo
August 19th, 2024 by Dr. Hannah Sivak
We had a good run! We did great work, designed and made great products, and improved many lives (including mine, during and after cancer treatment and several ongoing surgeries). Working at Skin Actives was my longest job ever, even longer than my research work in England and Michigan. Now it’s time to say goodbye, and of course, it hurts, but there is still a lot to be achieved. Keep an eye on my blog, I will keep posting, and I will find a way to communicate with you, receive questions and reply to them. Hannah
June 27th, 2024 by Dr. Hannah Sivak
No se sigue nada al respecto de la lista de ingredientes. Agua, glicerina, ciclopentasiloxano, propanediol, PEG-75, glicol de pentileno, aceite de semilla de Helianthus annuus (girasol), trietilhexanoína, palmitato de etilhexilo, dimeticona, Polyquaternium-51, Hialuronato de Sodio, Extracto de Fruta de Vitis Vinifera (Uva), Extracto de Fruta de Actinidia Chinensis (Kiwi), Extracto de Cáscara de Citrus Aurantium Dulcis (Naranja), jugo de Prunus Armeniaca ( damasco ), alantoína, arginina, glucosil trehalosa, hidrolizado de almidón hidrogenado, alcohol behenílico, estearato de glicerilo, estearato de PEG-75, polisorbato 80, etilhexiglicerina, tocoferol, carbómero, polímero cruzado de dimeticona, butilenglicol, EDTA tetrasódico, fenoxietanol, fragancia. Lo que les puedo decir de este producto japonés (sí, es japonés) es que su publicidad…
June 23rd, 2024 by Dr. Hannah Sivak
You can’t tell from the ingredient list. Water, Glycerin, Cyclopentasiloxane, Propanediol, PEG-75, Pentylene Glycol, Helianthus Annuus (Sunflower) Seed Oil, Triethylhexanoin, Ethylhexyl Palmitate, Dimethicone, Polyquaternium-51, Sodium Hyaluronate, Vitis Vinifera (Grape) Fruit Extract, Actinidia Chinensis (Kiwi) Fruit Extract, Citrus Aurantium Dulcis (Orange) Peel Extract, Prunus Armeniaca (Apricot) Juice, Allantoin, Arginine, Glycosyl Trehalose, Hydrogenated Starch Hydrolysate, Behenyl Alcohol, Glyceryl Stearate, PEG-75 Stearate, Polysorbate 80, Ethylhexylglycerin, Tocopherol, Carbomer, Dimethicone Crosspolymer, Butylene Glycol, Tetrasodium EDTA, Phenoxyethanol, Fragrance. What I can tell you about this Japanese product (yes, it’s Japanese) is that its advertising is honest. The claims are “No synthetic fragrance, no coloring, no mineral oil, weakly acidic, paraben-free, alcohol-free. ” True, but not important. …