Hair Loss? Dandruff? Interesting Hair Facts Everyone Should Know, According to a Dermatologist

Dermatologists are not just trained in skin, we’re also trained in hair and nails. So for today’s video, I want to focus on hair and tell you a few facts that are important to know. You'll learn more about the anatomy of the hair, hair loss and alopecia, how to treat dandruff, and so much more.
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CHAPTERS:
00:00 Intro
00:33 About Your Hair
01:55 Hair Anatomy
03:53 Hair Phases
05:38 Telogen Effluvium
06:20 Hair Loss
07:10 Average Amount of Hair
07:28 Alopecia
08:00 How Often to Wash Hair
09:30 Hair Damage
10:49 Dandruff
IMAGE CREDITS:
🔹 Curly hair - the science behind it. Dr. Lüderitz Natural Cosmetics. (n.d.). Retrieved October 20, 2021, from www.drluderitz....
🔹 Master the skills of hair cuticle repair once and for all. Lewigs. (2021, July 7). Retrieved October 20, 2021, from lewigs.com/hai....
DISCLAIMER: The information in this video is not intended as medical advice, diagnosis, or treatment. Always seek the advice of your physician. Some of the links in this description may be affiliate links (marked with *). Affiliate links help support my KZbin channel so I can continue to create fun, informational skincare videos for you. Also, some products may have been received as PR. Thanks for watching!

[@katboyum3054]

I'd love to see a full hair care routine!

[@marieJennell]

SAME!!🙏❤

[@MoonRaspberries]

Can you talk about the popular natural trends like: using rosemary oil, Castro oil, or even rice water on hair/scalp - is it actually beneficial?

[@kaslayton]

Yes please! I’ve been doing the rosemary essential oil with a carrier oil. I hope I’m not doing any harm…

[@MsErika1226]

Yes please!

[@danskerenflomme]

There's studies around rosemary oil where it is compared with minoxidil 2% and found to have a similar effect. Check out pubmed yourself

[@inssaf767]

I can't use oils on my scalp cuz I have dandruff, even though I would love to. But since I can't, I use rosemary water after every shower. And I apply an enough amount of coconut oil on my lengths everyday.

[@machi1uk]

Sooooo needed this!!!!! Could we have a video on how to determine what is causing itchy flakes....how to diagnose the difference between dandruff, dermatitis and dry scalp.....

[@RB-zp4nm]

Yes please!

[@natashabelle21]

Yes, I would love this! Also would love product recommendations for treating these scalp conditions!

[@vchafab]

Yes please!

[@mrsmeggylee]

Yes please.

[@rachnrobb]

So interesting about oil & frequency of washes!!! I wonder why every single hairstylist I’ve ever met preaches to wash your hair less to decrease oil production. I will definitely trust the credibility of a dermatologist vs a cosmetologist! Loved this vid.

[@erinderooy3472]

It makes sense, doesn't it - you wouldn't wash your face less hoping it would produce less oil...

[@taniawalsh1876]

I know ! I am annoyed too cuz I have fine hair that needs to be washed more often.

[@LoungeLady]

I have been begging an actual derm to do a video like this!!! Thank you!!!!! So tired of relying on influencers because I couldn’t find the SCIENCE! You busted a number of myths for me! One remaining- sulfate shampoos and silicone conditioners- friends or foes? THANK YOU!!

[@taniawalsh1876]

Ohh yes good questions I want to know too!

[@inssaf767]

Im not an expert, i learned this when i started my hair journey. If you have oily scalp or you have dandruff, there is nothing bad about using a sulfate shampoo. In fact, you should opt for it to get a clean and non itchy scalp. Im not saying sulfate gets rid of dandruff tho. But if you have dry scalp, and the sulfate shampoo dries it out even more (cuz it depends on the person plus the sulfate percentage in shampoos is very little and regulated), u can opt for a sulfate free one. In all cases, just make sure to not compromise a clean scalp. A dirty scalp can lead to hairfall. For an oily scalp, the sulfate will do more good than bad. When it comes to the silicone conditioner, it's not bad to use it on the hair especially amodimethicone, but make sure the conditioner isn't loaded with many silicones cuz it can weigh down the hair on the long-term, even if it makes it super soft and shiny for the time being.

[@taerrific1710]

She has a video on this, busting hair myths or something along these lines.

[@gracepatterson4983]

Would love a video about thinning hair and what products you would recommend to help. Would a collagen supplement help? Any advice would be much appreciated!

[@pujaguptas11211]

As a hairstylist of almost a few years, I can share with you you, that you're not intended to apply harsh shampoo on your hair. I have observed hairlines of numerous people, and I spotted that individuals who were using strong shampoos generally had weak hairline. So I suggest only to use natural shampoo only. I myself use and advise to apply litttleextra coconioon shampoo only. Also, do warm oil massage twice a week as it boosts circulation and encourages hair growth.

[@RatneshTiwari-16]

I started using this cocoonioon anti-hair fall shampoo which has been quite impressive. It smells really nice and lathers well, leaving my hair feeling clean and fresh. It's helped reduce hair fall and breakage over time, which is a great result. It removes frizziness. It's become my go-to for stronger, healthier hair.

[@samr5816]

Would love a video on androgentic hairloss treatment options (for both Men and Women). So many options like LLLT, Minoxidil, Ketaconazole, PRP as well as Finasteride. And so much fear mongering. My boyfriend is worried about taking finasteride but it seems safe from all the studies.

[@e.beauchamp]

Yes!!!

[@marieJennell]

I'm on fanestaride and the prescription shampoo that starts with a "K" and it's not helping its been months and the shedding stopped but 4 some reason it's shedding again while still being treated so I'm assuming it's stress. It can b a lot of things hair sheds too much about 3 to 6 months after what ur body may think of as a traumatic event like any kind of stress to the body or mind like child birth , stressful things if one's life , exercise believe it or not.... what ever stresses that may b in ur life may b causing it.. I'm in the same boat as u.. but also ur age and generics play a key factor aswell.. I also lost about 60% of my hair too started like 3 yrs ago.. so I was put on Propecia but it didn't grow any hair back and now it's shedding again so it's time to see a dermatologist.. if u have dandruff of any kind like me n ur scratching alot ur hair may fall out in the places that's affected.. my hair still is growing fast it's always been long but thinner then ever..

[@anabellarosario7741]

I love these type of videos, I’ve been experiencing thinning and dull hair for about 2 years now and my hair won’t grow past my shoulders. I’ve always had long healthy hair until now and for some reason it is getting thinner and thinner and I have lost 60% of my hair but no bold spots. Would love for you to do more videos for thinning hair 🤗

[@sarahp4420]

You might want to go to your doctor and get a blood test to check your vitamin d levels. I'm definitely not a dermatologist, but I have heard a lot of people say they have the same issues with their hair as you and that the culprit was being vitamin d deficient.

[@anabellarosario7741]

@@sarahp4420 thank you so much for the info. I will definitely make appointment to get this checked.

[@staceybextel4564]

Thyroid issues can also cause hair loss I believe. Good idea to chat with Dr make sure you covered all your bases

[@Linzy8956]

This sounds exactly like what I've been going through for the last 2 years as well!!! It's heartbreaking when your hair was once thick and long now it's just gone. Sending u lots of love hun I know how hard this is💜💜🙏🏼

[@anabellarosario7741]

@@staceybextel4564 yeah I will definitely get some blood work to check my thyroid levels as well. Something has to be wrong for this to happen so drastically.

[@nearlygotme]

Please do your hair care routine 🙏

[@jhdct94]

Mind blown! Really learned a lot in this video. I have always been concerned about losing my hair in huge clumps while in the shower. This video put me at ease that I am not losing too much hair. Would love to see a similar video on nails, specifically how to make them stronger so I can grow them out. I have found that as I age, my nails are breaking easily and I cannot get them long like I did in my twenties and thirties. Thanks Dr. Ellis!

[@sbb8511]

Yes everyone on Reddit says you need to rinse off your conditioner with freezing cold water to seal in the cuticle! Thank you for clarifying!

[@christinemack2153]

I learned a great deal! I would love to know how you care for your beautiful hair. Have a great week!

[@dianevitale1214]

THANK YOU for a very informative video.

[@carolynp4605]

Very helpful insights on hair. Would love to see a similar take on nails. Especially about soft nails and what can be done to strengthen them. And, the impact of long time use of gel manicures.

[@ntheobsn]

Wonderful video. I’m a 31 year old guy and beginning to become extremely self conscious about my hair. It was reassuring to learn how many hairs we shed daily. The shedding is definitely more apparent when I shower at night and it’s definitely sucked some joy out of my nightly skincare routine to see hair on my sink etc. Wishing you the best and that I was not on the opposite coast in NYC to be your patient. 😊

[@danielleharlan8333]

I’d love a nail video!! My nails are thin and have pits and have never figured out why

[@Casey73955]

THANK YOU for telling the truth behind all the “rumors” I have heard for so long!!

[@marcellina4270]

Your hair is to die for !!!! 😘🥰😍

[@laurenfarrell4588]

This is all stuff ive learned on my own. Absolutely love this video. So much great knowledge. i wish every girl going through a hair journey comes across this video

[@jaymmxii7332]

Excellent video. Really enjoyed this one. So many useful facts and I love when u debunk myths. Would love a video on nails as well. 💅🏼

[@anngutgesell5135]

Finally someone is speaking the truth about hair/hair facts. I cringe when a hair dresser says the more you cut your hair the faster it will grow, WRONG!! I don’t understand why women in general are lied to about hair, Grrr. Thank you for putting this video out there.

[@elizabethwilk9615]

Yes it’s such a big lie

[@mmbalurea]

Thank you so much 😊. More videos about hair , hair loss and treatment please

[@tamaralynng]

More information on thinning hair and some balding spots…what to do to help increase volume and hair growth

[@Thebigbiscuito]

MORE HAIR & NAILS VIDEOS PLEASE!! 😍

[@5893dash]

Would love to have a video on recommended practices/treatments for a healthy scalp?

[@TheOpportuneNoodle]

I would really love a video about topical vs. oral minoxidil. Thank you 🙏🏼

[@RafaelReyesofficial]

Yess more hair videos! What about hair textures ? Does it really matter which texture you have and the general scientific knowledge about hair?

[@FM-pm5iy]

I’d love to know how to take care of very fine hair. Pain of my life

[@dancelovetravel]

Please do more hair focused videos! So informative!! Maybe product recommendations?

[@anad05]

If you could do in general more videos about hair health, that would be so great!! Thank you 🙏🏻

[@jayceestapleton2297]

I’d love a video on whether drugstore vs. high end haircare makes a difference and why based on ingredients!

[@tinabertot1153]

You’re hair is beautiful! Please continue this series by doing a video on the products you recommend to stop hair shedding and also to keep her healthy. Thank you for your great videos!

[@mariyakrutkova6294]

It’s so great to have an actual dermatologist speaking on issues normally addressed by “beauty gurus” who gather their information mostly from the internet where others like them write their opinions that are often not grounded in science. And then poor consumers, in search of cure for their skin and hair issues, end up wasting so much money grabbing all the lates products recommended by their go-to beauty guru (who probably got their video sponsored by the brand they recommended). Anyway, all of that is to say: thank you for doing this work. I love it that you always underscore that everyone’s skin and hair is different and requires “trial and error” approach to find the right products/routines.

[@summersadie3687]

Would love more info. on hair loss treatments, such as red light therapy, and prp; also hair vitamins such as viviscal and nutrafol.

[@lavayuki]

I didn't know derms do hair and nails as well actually, that's good to know. My mum suffers with hair loss, so will share your video with her

[@kendallstark4302]

As a redhead, I knew that fact about us! My mane has always been on the fine side but I've never wanted to change the color. As for blondes, that makes sense; my aunt was a natural blonde and I remember her hair being as thick as rope 💖

[@skincarelover9568]

Wow so informative!!!

[@kea4]

This is really useful. I would love to see another video on the topic of hair issues, including any dietary or product recommendations you might have.

[@personalcourage1]

I'm constantly concerned about hair shedding, water temperature, pretty much everything you mentioned. I always look forward to your professional advice. Thank you!

[@vick.valverde]

Thanks for sharing, I would love to hear more about hair loss due to PCOS and what to do if you can't take oral contraceptives as a treatment

[@sarenitydiaz1969]

I wish every person would watch this so this was't so much misinformation. ay yi yi Thank you Dr. Sam Ellis as always.

[@lorainemcgillivray77]

Hi Dr Sam I have eczema on the scalp and dry/curly hair. I need to moisturise my scalp and hair as much as possible using scalp serums and oils on the hair. I cannot wash it too frequently as it dries it out further, no matter how much mask/conditioner I use. I shampoo once a week and in warmer weather conditioner wash once in between. I mostly air dry to avoid heat styling. My hair is never greasy until the night before washing, when I apply an oil treatment overnight. I get tired of some Dr's saying that washing daily is recommended - my hair would hate that, as would my scalp. i've tried washing more often and it made me really itchy and even drier. i'm disabled so I'm not exactly doing intensive workouts and live in Scotland where it's pretty cold for much of the year. My menopausal (3 years since my final period) skin and scalp basically doesn't produce oil anymore and I always had dry/eczema prone skin and scalp anyway. There are many treatments available for oily skin conditions on the scalp, but far fewer for such dry scalps prone to itch. I use a gentle fragrance free shampoo and a hydrating scalp serum. Deep conditioners, leave in conditioners, curl creams and oil are my hair friends. Best wishes.

[@Princess-rb9yd]

Oils cause excessive buildup on the scalp which aggravates the eczema and don’t moisturize your scalp. Only water can truly moisturize your scalp. I would recommend doing the 30 day hair detox (look it up on KZbin or Google) and washing more frequently with hydrating shampoos only on the scalp instead of cowashes bc they don’t clean anything. I would refrain from putting leave in conditioner or anything really on your scalp, only the strands and ends because excessive buildup can lead to dandruff or eczema. Washing your hair at least once every 7-10days is necessary but 5 days is a good starting point if you need to it more frequently. I would try to figure out what triggers your eczema (stress, sweat, fragrance, mold, etc) and possibly do an allergy test. If you absolutely need something on your scalp, I’d only recommend spray leave on conditioners with very few oils in it only once (max twice) a week before wash days . Ditch the deep conditioners and get a good quality wash out conditioner. I have the same type of hair as you and the tips given to me by hair professionals and doctors really helped me

[@physicianskitchen]

Oh my gosh this is so interesting. We had a dermatology rotation in med school but didn't go nearly as deep into hair care. I'm taking notes :D

[@louisemay8140]

Great video. I would love to see a video on how you diagnose the various types of hair loss!

[@isabellas4120]

Oof Finally. An actual professional and not another blogger. Thanks, you're just what I've been looking for.

[@anahitam5060]

So professional and realistic. Lover her videos. Just facts and holistic approach!

[@Miabenedetti]

Great insight, Doctore! Thanks ❤

[@lilyyu1085]

Can you do a video on lash extensions and lash perms? Love your channel!

[@ccm800]

So well spoke.

[@Bo-hw1kn]

I learned that dandruff is a yeast problem, dandruff shampoo is a treatment and many other things before that... happy I found your channel!

[@tamy815]

I'd love to see a video on nails too

[@snowyasmrrp]

Damn the content of your video and information per videos is so detailed and easy to understand that I can't get enough of it... I am lucky to find your channel...keep making videos like this...Tysm ❤ 😍 💖

[@kawaiiheather5696]

I've heard that it's important to have lower ph levels of shampoo and conditioner. Can you speak to this? Need a part 2!

[@rosarysusan]

This is wonderful! Thank you for sharing such great information! As a cosmetologist, I’d love to hear more about hair color affects on follicles and and one with fine, thin ;and thinning) hair- I’d love to hear your thoughts on how to refresh the follicles and how to strengthen thin strands!

[@Mi-yc3oy]

The video I’ve been waiting for. Thank you!!

[@GabbyDegify]

OMG thank you for this video!! I have been lied to about so many of these lol

[@march384]

Please do more videos on hair!!! This would be amazing from a dermatologist, there is a lack of hair care content from professionals on social media.

[@deannamccarthy7658]

Thank you! Very interesting.

[@Jess-bee]

You’re so knowledgeable and smart 🥺🤩

[@kiaraislam7838]

can we have more hair care video or tips. some product recommendation. please

[@lovepeace4065]

This lady is brilliant very informative I learnt so much thank you, very interesting.

[@jenloves4260]

Great info! Can you talk about hair dye? A professional stylist dyes my hair. (Violet/red permanent professional dye) Now she said the color will stay longer in cold water…true or false. She also says the less often I wash my hair, the less fading of the dye I will have. I kind of think from experience of several years of her dying my hair that this is true. Finally, what about sulfate free? She swears it’s important for helping keep the color bright as long as possible. Just a note that I had dark brown hair naturally so we do bleach the roots every time we dye which is about 6-8 weeks. Sometimes less often if I use a color deposit like Punky Color.

[@bonesgooo2249]

My goodness, all this time I have been rinsing my hair with cold water. No more suffering.

[@chelseacarter6218]

More hair care facts!!

[@shilpamajethia5222]

Superbly explained

[@karinaseliukova3139]

Thank you for the video! Could you please answer what types of products should we use? Condition? Leave-in spray? Does it make sense? Especially how to apply them on short hair?

[@chencohen3943]

Amazing video!! Thank you🙏

[@stephanierebecca7616]

I'd love to understand if hair texture can change and how frequent. Is it genetic or caused by stress, diet, heat damage, etc. For example I've always had fine dark brown hair that is naturally wavy but over the years the wave pattern is less defined and some sections are straight, some are wavy, etc. I'm curious if that is a result of heat damage or just natural texture changes. I've also noticed I have more coarse hair strands that appear a dark black or just very course and more textured than my "standard" fine hair. Love the content you produce, thank you!

[@tiffanykuo8725]

Same here! I'm at a loss on how to take care of it most of the time!

[@jordanbeiswanger3776]

This was a wonderful video. Incredibly informative! Thank you!

[@monkeybeans1239878]

Thanks for the video! I’d love to hear more about how to care for type 4 (kinky/curly) hair in its natural state and chemically relaxed state.

[@yelenabegam7126]

Thank you so much for exactly the questions I and I am sure many people have. Love your channel. Thank you.

[@carolb801]

Please , a vid on nails, nail strength and how to stop nail breakage as we age🙏🏼🙏🏼🙏🏼

[@princesschelsea1558]

Would love some helpful tips on dealing with scalp psoriasis, the difference between scalp psoriasis and dandruff, and anything preventative that can be done about it between hair washes

[@mia_2524]

Love it . Very informative ❤️!!!

[@laurensit23]

I feel like this video was made for me. This particular issue has been top of mind for me recently and I'm really pleased to see that the advice you give aligns with the guidance I was very recently given by my own dermatologist.

[@RoshiniyaRavichandran]

mam your video was totally usefull and i want u to explain more about antidandruff shampoo

[@ashlielobos2100]

Are there any hair care products you can recommend?

[@aubeclaire]

Thank you for that video !! In my experience, I tried to wash my hair less often, until I did it once two weeks, and it was really perfect !!! No more irritation, no oily hair, nothing special. Now I’m on a curly journey which means more products, so I must wash my hair more often, and it’s ok, even if I miss my non-scratchy scalp… 😉

[@jzumpe1194]

Love your videos! Please talk about menopause and hair loss. Does taking collagen, vitamins help?

[@karlychappell5304]

Thank you so much for this video, I can’t believe how much false information is out there. Have learnt a lot thanks to you!☺️

[@parksbpknit]

I am now 65 but I had pin straight hair all my life until I had a child in my 30's. Now I have curly hair that seems to be getting even more curly as I age ( and of course it has gotten thinner ,hoping that will stop soon). In any case I would love to hear why this has happened, I know hormones play a part but how can they make such a huge change? Great video BTW.

[@maureengreen617]

I have the same situation. 64 and seeing the same thing since childbirth.

[@Thebigbiscuito]

Video about different in office treatment for different skin concerns, for example: Acne scarring: halo laser vs microneedling etc…basically everything you would tell your patients to help them make decisions about treatment 🙂

[@meechellewismer9419]

Could you do a video about hair loss and thyroid

[@alicja_ac6031]

Topic about hair loss please when all the blood tests are fine. Thanks

[@donnaclark9189]

I'm so glad I found your channel!! Thx for taking time to inform all us what a dermatologist knows! And I have a question.. I wash my hair about once a week sometimes twice but about my second day after washing my head itches.. I dont have dandruff or any flaking..just itches in diff spots..and thx again for your knowledge!! I'll see ya in your next video..😁 God bless.

[@NakedPsych]

exactly my issue-sometimes it burns a bit toop-but only spot wise?!

[@joannechandler5667]

Thank you for the information. 70 yrs old and have inherited my Mother’s hair patterns, that is, receding hair at my left temple area. Very frustrating and nothing I can do about it.

[@ljd3766]

Would love more info on how to treat hairloss xxx

[@aliceclements1]

so clear and well-delivered without repeating and droning on.. thank you!

[@Teri30]

Excellent video, thanks so much!

[@AdrianaGarcia-sq9zi]

Very informative and interesting...love the content, thank you!

[@Joelina456]

once again, an awesome video that all of us girls have been needing❤️

[@abi9372]

Yes ,make more videos like this .❣️

[@mitali4595]

Please please shed some light on premature graying of hair and tips to prevent it.....and what role do shampoos and chemicals therein play in increasing the graying.

[@farjanaakter9138]

Can u plz suggest some common shampoo & conditioners???? Like:Pantene,Tresemme,Ogx,Head & shoulder, Herbal essences,Garnier,Loreal plzzzzzzz

[@Mariam-wg8gp]

Thank you Dr. Ellis. This video was super informative. I knew almost none of these facts. As always love your videos 🥰

[@mariorodin9246]

Thank you so much! This video was immensely helpful

[@jodimakkena8999]

My question is regarding the dandruff shampoo. I have a 13 yo son. I’m sure you see where I’m going with this…. anyway, he hasn’t had any noticeable dandruff in a few years. Should he continue with the dandruff “shampoo”, or should he alternate with a regular shampoo? Also, if he uses the dandruff “shampoo”, should he follow with a regular shampoo? Sorry for all of the questions!

[@vandhana_babu]

Hey derm . Hope you are doing good!?. Excited to watch this video 😊

[@brookie6699]

Pls give us a hair care routine ❤️❤️ or a drugstore hair care routine too