I've always loved Stella's hair transformation videos, but I'm also really liking this new direction to understand the science behind the hair.

I have black hair and I'll never bleach it but I find this very interesting regardless. Great work Stella. ❤️

Wonderful and informative! All of it made such sense! I had a nightmare trip to a hairdresser that left my hair warm blonde when I wanted cold - right after bleaching and toning my hair was rose gold, I think the toner was wrong and she would not admit to anything - and now I have the confidence to tinker with my hair again myself! For the record, I have previously bleached my hair by myself. Last time I had grown out my natural color and wanted to bleach the whole thing and needed a professional for that. Now I feel I can bleach my roots and hopefully, lighten the ends just a little bit, to get it ready for pastels.

Stella is a very good Teacher, and a good person .Please don't question her knowledge or her techniques . Why can't we all just get along? I love it when you teach us stuff.

I agree with Stella I have dark hair and for me to go blond just isn't worth it.. And the grow out I don't have money to maintain it.. But blond hair is beautiful

Thank you Stella! I’ve been bleaching and dying my dark hair for years now and struggle the most with dullness, especially after bleaching. I kept getting told to do protein and deep conditioning, but it all seems worthless unless you know the real science. I learned so much in such a short video!

Thank you for being an educated hairdresser - most do not tell us the truth. ❤

Thank you Stella I've been needing this!! Just bleached my hair yet AGAIN and was searching for answers on how to deal with it. You came through again girl!

LOVE THE NEW FORMAT OMG somehow it suits you very very well ! everything was super clear & easy to understand

For me it depends on the bleach and how you take care of ur hair. I've bleached my ends and I had some damage from previous bleach on the front pieces and now it's rlly rlly damaged but the rest is just a little dry (still very strong) awesome vid Stella 👏 👍 💙

If I could, I would fly to Malta and have you do my hair. I wouldn’t even do small talk!

Is it damaging? 16:41. Yep. A picture is worth a thousand words.

I loved this video! I would also love to learn about perms and relaxers because I've always been curious how those work too.

Thank you for all the info!! You explain it sooooo good. (Sad sad story for some of the dark hair ppl….i hate deep emeralds, reds…all that ….i always loved neon and pastel colors….we have a solution tho: wigs, they are natural hair ones for decent prices that you can dye how you want ( i need to finish 2nd year of hairstylist so also can cut it and if you don’t go somewhere and they cut/ dye for you…wear the same hair the same day is boring…even if you love your natural hair/ deep colors/ have long hair or short… Well i’m writing too much loved the video. Ten peroxide volume is what i choose for a day of bleach and colors on my friends…spend the day at home and end with a new color while we do karaoke, see a contest….i mean for the developer. Never used Blondme but if it has a bond protector…will be mine for my shenanigans.

Thank you for so full instruction about bleach process👍 As blonde I really appreciate that ❣️

Don't be fooled by her. This is false and a lead on. Fals claims, either intentionally or ignorantly. Bleaching will ALWAYS, without fail, lead to some amount of damage. You can reduce the the damage, minimize the damage, keep the hair manageable and more or less structurally intact, but it is ALWAYS a damaging and destructive process. Saying otherwise on the first seconds of the video only shows that Stella HAS NOT understood the chemistry of the process - or only to the most basic degree. A process that is, to the contrary, not basic at all, of you really look into it. Bleaching is *always* an oxidative process that oxidizes - and thus irreversibly, permanently destroys, proteins (and other molecules) in the hair. Those proteins include the natural colour pigments, called melanins, eumelanin and pheomelanin, and structural proteins. Now there is no way if destroying the preoteins you want destroyed, the pigments, without destroying some of the proteins you want to ideally keep. Because they are attacked by the same process. Luckily, many of the structural proteins are a bit more resilient, or put differently, the pigment proteins are a little more susceptible than the structural ones. But still. That claim, that promise, at least in it's absoluteness ("...without damaging..") is wrong. Any cosmetic chemist will confirm. She is doing what many advertizers do: telling the consumers, what they want to hear, what they want to believe. That is the seduction of advertisements. Maybe she wants to believe it herself, may be she does believe it herself, but it is definitely not true. Damage can be minimized, not completely avoided. And ot is permament and will accumulate and worsen over time with each additional bleach or procedure.

Whoop whoop 🙌🏾 Another Nerd Stella video. I can watch these all day long!!!! ❤

I started going blonde early this year, and while I realise there has been some damage to my hair, because of the shampoo/conditioner I use and the healing mask, it's now very healthy and actually healing. Let me explain, before I ever started going blonde (from brown), I had a fair bit of sun damage done to the top layer of my hair. Sun damage is a actual thing, like with skin, it roasts your hair making it more frizzy than it'd normally be. With my hair it was moreso wavy on top than the nice curls I got underneath. Now that curliness is starting to show throughout my hair, not just the underneath layer despite the bleaching. When I tried bleaching it myself, afterwards it was quite damaged, so I always recommend going to an actual salon for bleaching, a good one at that. It's expensive, I know. It hurts my wallet majorly every time I go, but they lift my pigment enough that I'm seeing results and its not damaging it beyond repair. If you refuse to spend that kind of money, slowly lighten it over time and wait a couple month inbetween bleaches. Damage, let it settle, repair and then do it all over again. Use good shampoo/conditioner, they're not necessarily have to be expensive. The one that has saved my hair isn't the most expensive out there, but its done loads more for my hair than any others I've tried. This is AUD, but the most expensive I've tried was $40/bottle, meanwhile the one's I use now is $23/bottle. I always get it on sale cause they sell it at Coles and Woolies. It's Maui, perfect for us curly haired girlies.

Science with Stella is my favorite class!

I used to use live box bleach and it’s 40 vol and the amount of times my hair suffered until I found your channel I now use Jerome Russell bleach powder and 20 vol my natural hair colour is around a level 7/8

Hey Stella, thanks so much for another amazing video, absolutely love your content x

Oh wow. Usually I'll multi task while listening/watching you but today you made me stop everything and listen and watch to your science lesson. Loved it. Thanks

Is there a leave in conditioner you would recommend for dry chemical damaged hair? I really like this educational videos, it really helps make sense of the process.

Forgive me for being so silly I just needed a good laugh this time around

Stella black lashes✨🤩✨ to blonde lashes All ✨gone

Why any of my science classes at school wasn’t like this?! I sensed something more about the bleaching process but never sought out the science bc mostly I’d never picked it up with textbook style explanations

The wig looks so goooood on you ❤

Yeah I mean bleach is damaging but there are ways you can minimize the amount of damage it does. It took me a while to figure out how much bleaching my hair can actually handle. I'm naturally somewhere around level 4 (dark/medium brown) but getting it light blonde without any significant damage is not actually all that difficult for me. But any overlapping on already bleached hair, or bleaching my hair when dyed, is gonna fry it. Also because my hair is super fine, it lifts well but also snaps more easily. So going for a full head of blonde and maintaining the roots never ends well for me. But I can do highlights, balayage, money piece, etc, just fine. As long as I only ever bleach my natural hair, not previously dyed or otherwise treated. Although I can't get it completely crisp white. There will always be some yellow tones left. So I've learned that when it gets to a pale yellow, that's as bright as it gets, which is good to know to avoid over-processing. Knowing that, it doesn't so much matter how high or low volume developer I use. That said, I still often end up frying my ends on because I insist on going for a high contrast balayage with very light ends, and it's difficult to completely avoid over-processing when aiming for the lightest possible result, but... I don't consider this a major issue because I can always just trim off the ends if they get too damaged. Losing one inch of length (on long hair) is not a big loss. So I think if you wanna go crazy with bleaching dark hair super light, I think you should do just highlights and/or the ends, because that way you won't end up with a huge loss if things go wrong. At this point most of my hair is healthy but my ends are a little frazzled. I bleached it at home in a balayage style, which I've been doing for years by now, going from my natural brown to orange to pale yellow. I like the golden "brassy" tone (because it compliments my warm olive skintone) so I didn't do much toning.

Thank you so much for the time and effort you put into helping others perfect their art.

Very good explanation! But my hair breaks even with a bleach bath with 10 volumes and takes months of care with expensive products to get less crispy. 😢😢😢

I think if the hair bond is broken and hair is coming apart, nothing can be done. Please correct me if I'm wrong.

And I’m not really sure whether you can bleach your eyelashes or not

This is one of my favorite videos you've ever done!!!

Thankyou this has helped a lot, luring the biology side to hair because I'm starting my hair dressing journey to becoming a hair dresser Xx definitely took notes while watching. Thankyou again

Stella please keep doing these types of videos. This was amazing!

Thanks again!!! You made my hair, fun and healty thanks to your explanation and advice on each video. 🤘

REALLY GREAT INFORMATIONAL VIDEO STELLA! THE BEST PART WAS THE TIPS AND INFO ON HOW TO PROTECT,REPAIR, AND MANAGE THE INTEGRITY OF THE HAIR! (LOVE THE DIY TIPS THE MOST LOL) 👍 👌

I wish that professional products were more accessible to DIYers. I kinda understand why they're not, but it sucks that it's an art that is somewhat gatekept. Why shouldn't I be able to learn how to do it right and with the best quality on my own, if I want to? Like I'd love to be able to do olaplex during the bleach process but that product isn't available to me.

That was actually so interesting !! Now i wanna bleach my whole head 😂

Loved this video as it was chock full of information.

Can you talk about treatments when your hair is melt please?

Even though bleaching is very helpful

Sorry Stella but bleaching your hair is always damaging. if you don't know what you're doing then it can be even worse but you cannot prevent the damage. You can make the hair look nicer by masking it but that doesn't mean it's not damaged. Sooner or later you'll start seeing the brakeage.

the video youtube didn't know it needed

That same brand melted my hair off :^( 😞

I'm in love 💘 with the word "Schwarzkopf" I don't know why 😂

Nerd Stella is one of my favourite Stellas 😂😂

Science Stella knows her stuff.

😂 wow, we🤩😂 bleached lashes lifted 9 shades fall out ✨🤩✨😂

Everything she said is absolute truth. Thank you my dearest tracher and mentor 💚💙🩷

After watching Stellas vid I feel like a I am a pro now😆 Science Bitsches 😂😂😂❤❤

Such a informative post!! Thanks so much for sharing your phenomenal amount of knowledge!!

Can you please do this but for permanent dyes????

Watching this video feels like I’m in hair school again 😂😂

Hi! I am still wondering: What about going from brown to copper?

Brilliant video stella - alot now makes sense

Thank you Stella for teaching us, About bleach the hair, We enjoy the ur teaching 💐💐💐💐

I really enjoyed that Stella, thank you 😊 my family always have a go for bleaching I always try to explain but they don't understand so I'll send them this! ❤❤

Are there bleaching powders that only lift 2 levels? Because the lowest I have seen are the 7 level lift ones and that is what I use. But my natural haircolor is very light, between a level 8 and 9 and it always feels weird using a bleach that lifts 7 levels when I do my regular highlights on myself. If you know any, pls let me know 😅💜

Again I learned something new 😌 .. Thank you Stella!

Have you ever considered using rose water for neutralization? I believe that it is 5.5 ish pH. and won't be as stinky??

I need the after care info. I’m too scared to do the actual bleaching myself so I’ll let the stylist worry about this stuff.

I love watching your videos I learn a ton from you

My question is if you have like a level one hair and I want to reach the other end of the spectrum of course my hair will get damaged like it was mentioned but because I want to bleach my roots too will it permanently change my hair. Like after some time if I let it grow out buzz cut it will my hair return to how it was prior to the bleach (I have virgin dark brunette hair)

I think it depends on what you are doing for example my hair is a light copper brown and i added two streaks in the front halfway down the hair no where near the roots only midshaft down, i didn't get any damage at all and i only left it on for 15 minutes, because it lightened quickly i use the bleach everyone dreads and calls garbage called clairol b20 i have never had a problem..i guess if you go drastically light im sure its a totally different story.

It was so educative, thnak you! 🥰

Yes! Period!

Such a good video. Thanks so much!

Awesome info!

If I have a dark hair like 4/5 and I really want to get white hair can I still bleach them without the serious damage?

if you had cosmetology in school you would be the perfect teacher

You feel me Stella … 😂 i bleached my hair just yesterday it s very blonde ! My roots are level 6 alas what can i do please ? Thanks to anyone answering me Blessed be dear Stella

Excellent video! Thanks!

Great video!

Great explanations…thank you!!

Love you girl ❤

I actually melted my own hair by bleaching 3 times in one day 9+ level lift with 40 vol peroxide on BOX DYED BLACK BLUE HAIR. So my hair was black with blue highlights I did myself and I didn't know that the box dye had an activator in it. I'm used to semi permanent dyes or just pigment that sits on your hair. I knew chemically what I did to my hair but it took 3 times. I had no Oliplex or anything. I just stubbornly wanted this darn color out. Well, after I melted my hair and got it chopped off, colored, HILARIOUSLY blue (and purple) --bc I figured the blue needed to have one last huzzah since it destroyed my hair!!! lol I proceeded to rinse my hair once a week for four weeks in a vinegar solution, and put keratin bonding masks on it. I saved the rest of my hair that way. The ends were just done. DONEEEEEEE. lol Anyway now that I've been bleaching my hair for 17 years I can say with confidence it will never happen again as I learned the chemistry behind it as well. lol. Like I knew I denatured the keratin in my hair. Might as well figure out how I did it so I won't do it again! Now I use 10% peroxide shampoo baths with 7+ lift for 15 mins because I learned my hair lifts very quickly as it's already light--just not white like i want and it's between fine and medium texture. I think I'm one up from what's considered a light brown naturally. So in the dark blonde area.

Real eyes?

Blond Me is a great product!

Prefect explain, thank you!

You should use the blonde me with the fiberplex in it that one I would try 😊

Love educational Stella ❤

so i should stick with 20 developer and leave it on longer?

Thank you so much) very entertaining.

I am wondering if i could get my black-brown hair to lift just enough to get (a dark) red? This probably depends on the undertone (mine is cool) butit would be cool if it worked ngl

Thanks ❤

3rd yay! Love you Stella!

I want videos talking in spanish pleaseeeee

"science bitches" 😂 I learn so much from your videos, thank you for sharing your knowledge and artistry. 🏆

If you have done a relaxer on the hair, what amount of time is it safe until you can bleach?

Question, my natural colour is white blonde (no im not joking) and after 2 decades of blacks, reds and purples ive finally managed to grow my hair out to a level 7. Whats the possibility of me being able to get back to my natural colour?

I have never bleached my hair but I am a dirty blonde. I’ve only ever used semi permanent hair dye.

I LOVE SCIENCE

"Science, Bitches!" :D :D

how are you telling me it's not gonna damage my hair while your hair literally looks fried liek someone electrocuted you

💝

Just for everyone's information: coconut oil prevents bleach damage! It acts like a natural "olaplex", in my experience. Apply it on your hair, especially ends, before bleach or any other chemical colour treatment, and you'll see! (Caveat: I'm also naturally level 6-7, so for anyone with darker hair than that, YMMV.)

Your information is usually always wrong, are you even licensed?

That is interesting, beautiful.

😍