15% off £30

Buy 1 Get 1 Half PriceSummer ShopOffersOffers HubBuy one get one 1/2 price25% off or moreOnline only 25% off or moreOutletGreat SavingsBuy 1 Get 1 FreeBetter than 1/2 price2 for £18 Mix & MatchLast chance to buy3 for 2 Mix & Match1/2 PriceVitamins & SupplementsVitamins & Supplements HubJoints, Aches & PainsImmunityGut HealthEnergyChildren's HealthLow Mood & DepressionStress & AnxietyHealthy HeartWeight ManagementExercise & RecoveryVitamins & Supplements Shop AllCBD Vitamins & SupplementsShop all CBD Vitamins & SupplementsCBD OilCBD CapsulesCBD SprayCBD GummiesCollagen & SilicaMuscle Support & Joint PainHair, Skin & NailsShop all Hair, Skin & NailsHair GrowthFunctional MushroomsVitaminsShop all VitaminsMultivitaminsVitamin AVitamin BVitamin CVitamin DVitamin EVitamin KVitamin DrinksMineralsShop all MineralsMagnesiumIronZincCalciumSeleniumChromiumSupplementsShop all SupplementsFibre SupplementsAcidophilus & Friendly BacteriaPeppermint OilGrapeseed ExtractLecithinCollagen & SilicaOmega & Fish OilsPlant Sourced SupplementsSuperfood SupplementsArnicaApple CiderRaspberry KetonesAloe VeraChondroitin & MSMCo Enzyme Q10Evening Primrose OilGarlicGinkgo BilobaGlucosamineGlucomannanSeaweed, Kelps and Aquaceuticals5 HTPDigestive EnzymesSaw palmettoCharcoalWomen's HealthShop all Women's HealthMenopauseMenstrual SupportUrinary Tract HealthPregnancy & ConceptionMen's HealthShop all Men's HealthProstate HealthChildren's HealthConditionShop all ConditionCholesterolAllergy & Hay Fever CareAnxiety SupportBone & Muscle HealthMuscle Support & Joint PainBrain & Memory SupportWomen's HealthMen's HealthChildren's HealthCold & Immune SupportFatigueDigestive HealthHair, Skin & NailsHeart & CirculationLiver CareMood SupportSexual HealthSleep & RelaxationStress ReliefVisionHerbal & Licensed RemediesShop all Herbal & Licensed RemediesRescue RemedyAshwagandhaMilk ThistleGinseng & GuaranaHomeopathic & Flower RemediesShop all Homeopathic & Flower RemediesRescue RemedyTissue SaltsFlower RemediesHomeopathic RemediesAt-Home TestsVegan Vitamins & SupplementsCBD Homeopathic Buy one get one 1/2 price25% off or moreOnline only 25% off or moreHolland & BarrettVitabioticsSolgarNew NordicWeledaBioglanBetterYouNatures AidGrass & Co.Nature's WayDairy FreeGluten FreeSesame Seed FreeCelery FreeCereal FreeCrustaceans FreeEgg FreeFish FreeKiwi FreeLupin FreeNew inFood & DrinkFood & Drink HubImmunityExercise & RecoveryGut HealthEnergyJoints, Aches & PainsWeight ManagementDental HealthFood & Drink Shop AllDried Fruit, Nuts & SeedsShop all Dried Fruit, Nuts & SeedsNutsDried FruitSeedsMixesHoney, Jams & SpreadsShop all Honey, Jams & SpreadsManuka HoneyHoneyNut ButtersJams & ChutneysSyrupsSpreadsPateDrinks & JuicesShop all Drinks & JuicesNatural Energy DrinksKombuchaJuices & Health ShotsSoft DrinksWaterProtein ShakesAlcohol Free DrinksTeas, Coffee & Hot BeveragesShop all Teas, Coffee & Hot BeveragesCoffee & Coffee SubstitutesMushroom DrinksTeasSuperfood TeasMatcha & Green TeaSleep & RelaxationPeppermint TeaSlimming TeaSuperfoodsShop all SuperfoodsSuperfood PowdersMoringa PowderMaca PowderChia SeedsFlaxseedSpirulinaGoji BerriesBaobabSnacksShop all SnacksProtein BarsLow Calorie SnacksChocolate, Cakes & BiscuitsCrisps & ChipsSavoury SnacksSweet SnacksSnack BarsFlapjacksPopcornVegan FoodShop all Vegan FoodMeat-Free AlternativesDairy AlternativesEgg SubstitutesVegan ProteinVegan Protein BarsFood CupboardShop all Food CupboardApple Cider VinegarCondiments & SaucesRice, Pasta, Pulses & GrainsTinned FoodsBreakfast CerealsBreakfast CerealsShop all Breakfast CerealsCereals, Bran & FlakesGranolaMuesliOats & PorridgeBreakfast BarsCookingShop all CookingCooking IngredientsApple Cider VinegarCondiments & SaucesMeat-Free AlternativesSoup & Ready MealsRice, Pasta, Pulses & GrainsHerbs, Spices & SeasoningGravy & StockHome BakingShop all Home BakingBaking MixesBreadFlourSweeteners & Sugar AlternativesEgg SubstitutesDairy AlternativesShop all Dairy AlternativesOat, Rice & Hemp DrinksSoya DrinksNut DrinksCoconut DrinksNutritionally Complete FoodBuy one get one 1/2 price25% off or moreOnline only 25% off or moreHolland & BarrettNaturyaGrenadePukkaHeath & HeatherHuelPhDNakdTwiningsMeridianGluten FreeDairy FreeWheat FreeEgg FreeSugar FreeMilk FreeSoya FreeSesame Seed FreeCelery FreeFish FreeNew inSports NutritionSports Nutrition HubExercise & RecoveryEnergyWeight ManagementLow Mood & DepressionStress & AnxietySports Nutrition Shop AllProteinShop all ProteinWhey ProteinClear ProteinMass GainersVegan ProteinDiet ProteinCaseinSports SupplementsShop all Sports SupplementsTestosteroneElectrolytesEnergy GelsSports CollagenPre Workout & EnergyShop all Pre Workout & EnergyPre WorkoutCaffeine-free-pre-workoutAmino Energy PowdersBars, Drinks & SnacksShop all Bars, Drinks & SnacksEnergy BarsProtein BarsProtein ShakesProtein SnacksNutritionally Complete FoodMeal Replacement ShakesIntra WorkoutKetoPost WorkoutAmino AcidsShop all Amino AcidsAmino Energy PowdersBCAAL-LysineGlutamineCarnitineArginineCreatineShop all CreatineCreatine PowderCreatine CapsulesVegan Sports NutritionShop all Vegan Sports NutritionVegan ProteinVegan Protein BarsVegan Pre Workout & EnergyVegan Amino AcidsVegan CreatineSports AccessoriesShop all Sports AccessoriesBottles & ShakersFitness EquipmentFitness GoalShop all Fitness GoalRecoveryMuscle & StrengthLean MuscleEnergy & EnduranceDiet & Weight Loss25% off or moreGreat SavingsBuy one get one 1/2 priceOptimum NutritionPE NutritionUSNGrenadePhDApplied NutritionHuelSiSFoodspringYfoodGluten FreeDairy FreeSugar FreeSoya FreePalm Oil FreeCelery FreeCereal FreeCrustaceans FreeEgg FreeFish FreeNew inBeautyBeauty HubSkin Health - by skin concernDental HealthWomen's Health - Cycles & MenstruationSexual HealthJoints, Aches & PainsWomen's Health - PregnancyChildren's HealthExercise & RecoveryImmunityLow Mood & DepressionNatural Beauty Shop AllAromatherapy & HomeShop all Aromatherapy & HomePure Essential OilsBlended Essential OilsBase & Carrier OilsHolisticSkincareShop all SkincarePremium SkincareFace CareBody CareSun CareTanning & BronzingEye CareLip CareFoot CareHand & Nail CareSkin AilmentsSkin OilsCBD BeautySun CareShop all Sun CareSun Lotion SPFMineral Sun CareFace SPFAfter SunHair Skin & NailsWashing & BathingShop all Washing & BathingShampoo & ConditionerBathing AccessoriesShower Gel & Body WashDeodorantDentalHand WashSoapBath Soak & OilBody ScrubBath Bombs & SaltsFeminine CareIncontinence SupportHair CareShop all Hair CareShampoo & ConditionerHair ColouringHair MasksHair Oil & SerumHair Spray, Gel & MousseHair AccessoriesMother & BabyShop all Mother & BabyBaby Skincare & ToiletriesElectrical WellnessSexual WellnessBuy one get one 1/2 price25% off or moreOnline only 25% off or moreDr OrganicFaith in NatureWeledaNaturtintTisserandMiaromaSukinQ+AEthiqueSo EcoAlcohol FreePalm Oil FreeGluten FreeParfum FreeMicroplastics FreeCelery FreeCereal FreeCrustaceans FreeDairy FreeEgg FreeNew inCBDShop all CBDExercise & RecoveryLow Mood & DepressionStress & AnxietySleep & RelaxationCBD Vitamins & SupplementsShop all CBD Vitamins & SupplementsCBD OilCBD CapsulesCBD SprayCBD GummiesCBD Food DrinkCBD BeautyBuy one get one 1/2 price25% off or moreOnline only 25% off or moreLove HempGrass & Co.CBDfxfourfiveTRIPHolistic HerbCannaray CBDReakiroHolland & BarrettBody & Mind BotanicalsDairy FreeAlcohol FreeGluten FreeNew inWeight ManagementWeight Management HubExercise & RecoveryWeight ManagementEnergyHealthy HeartWeight Management Shop AllFat Burners, Binders & Appetite SuppressantsShop all Fat Burners, Binders & Appetite SuppressantsFat BurnersFat BindersAppetite SuppressantsSlimming TabletsWeight Management Shakes Shop all Weight Management Shakes Meal Replacement ShakesDiet ProteinDiet Food & DrinkShop all Diet Food & DrinkDiet FoodLow Calorie SnacksSlimming TeaExercise SupportShop all Exercise SupportFitness EquipmentMeal Replacement ShakesDiet ProteinProtein BarsBuy one get one 1/2 price25% off or moreGreat SavingsGrenadeOptimum NutritionHolland & BarrettPhDUSNPulsinEat WaterNew NordicSlimExpertApplied NutritionGluten FreeSugar FreeDairy FreeWheat FreeNew inVeganHealth & WellnessShop all Health & WellnessJoints, Aches & PainsGut HealthSkin Health - by skin concernEnergyWomen's Health - Menopause & PerimenopauseLow Mood & DepressionStress & AnxietyExercise & RecoveryWomen's Health - Hormonal HealthImmunityJoints Bones & MusclesGut HealthHair Skin & NailsStress AnxietySleep & RelaxationBuy one get one 1/2 price25% off or moreOnline only 25% off or moreHolland & BarrettVitabioticsWeledaSolgarDr OrganicNaturtintOptimum NutritionBetterYouNew NordicBioglanDairy FreeGluten FreeAlcohol FreeSugar FreeWheat FreeSoya FreePalm Oil FreeSesame Seed FreeCelery FreeCereal FreeNew inShop for your WellnessJoints, Bones & MusclesWomen's HealthMenstrual HealthMenopauseSkincareGut HealthHair, Skin & NailsImmunitySleep & RelaxationFood & DietChildren's HealthStress ReliefHealthy HeartEnergyLow Mood & DepressionConcentration & AlertnessEye HealthSexual HealthLearn about WellnessJoints, Bones & MusclesWomen's HealthPeriods & Cycle HealthMenopauseImmunityGut HealthFood & DietSports & FitnessSleep & RelaxationHair Skin & NailsArticlesAll articlesHealthFood & nutritionGut healthImmunityJoints, bones & musclesWomen's healthWellnessHair & skinMental wellbeingSeasonalSleep & relaxationSports nutritionRecipesAll recipesGluten freeLow sugarVeganDairy freePodcast

Biotin for hair

biotin supplements with hair comb
Biotin for hair – does it work? How do you take it & what are the side effects? We answer all of your biotin and hair-related questions in this article. Check it out…

Did you know there’s a Vitamin H? Well, there is, and it’s also called biotin.

Biotin is a water-soluble vitamin that happens to be part of the Vitamin B family, which is what we have to thank for helping our bodies turn food into energy.1

As for the name, ‘biotin’ it sounds a bit scientific, doesn’t it? Well, it actually stems from the ancient Greek word, ‘biotos’ which means ‘life’ or ‘sustenance.’ B vitamins, especially biotin, are widely recognised as going hand-in-hand with keeping our eyes, liver, and nervous system healthy. Meanwhile, biotin specifically is considered as being crucial during pregnancy because it plays an important role in embryonic growth.

Biotin is responsible for:

  • Processing the nutrients from our food
  • Energy release
  • Healthy hair, skin and mucous membranes
  • Normal nervous system3

The vast majority of people get their daily biotin intake from what they eat every day. Interestingly, it has been claimed boosting your biotin levels can help regulate blood sugar levels, boost hair growth and help with skin and nail health.

(For more on the Vitamin B family and what these vitamins do for the body, ‘What’s the best Vitamin B to take?’)

How do you take biotin?

Because biotin is a water-soluble vitamin, our body doesn’t store it, so it’s important you’re consuming it within your diet on a daily basis to keep your biotin levels topped up.

Good biotin food sources include3,4:

  1. Egg yolks
  2. Avocados
  3. Legumes – beans, peas and lentils
  4. Nuts and seeds
  5. Liver
  6. Yeast
  7. Mushrooms
  8. Sweet potatoes
  9. Broccoli
  10. Bananas
  11. Pork
  12. Carrots
  13. Apples
  14. Chicken
  15. Lettuce

You can also take biotin in supplement form too, and the recommended intake for adults is between 30 and 100 micrograms (mcg) a day.

Children need:

  • 6 months to 1 year old – 6mcg of biotin a day
  • 1 to 3 years old – 20mcg of biotin a day
  • 4 to 10 years old – 25mcg of biotin a day
  • Adolescents – 35mcg of biotin a day

Meanwhile, it’s also possible to use biotin topically too. There are specific hair growth and thickening shampoos on the market you can apply directly to your hair.

Does biotin help hair growth?

Our hair, skin and nails all contain a basic protein called keratin. You may recall some haircare and skincare products being enriched with keratin?7

Well, studies have found that biotin can improve the keratin infrastructure within our bodies. How this actually happens, and how biotin helps hair and skin health, is still very much a mystery.

Some research has been carried out, but evidence of biotin for hair growth, along with beard growth, remains limited. Among the research includes a study that was carried out in 2015, in which women with thinning hair were given an oral Marine Protein Supplement (MPS) that contained biotin or a placebo pill twice a day for 90 days.

At the start and end of the study, digital images were taken of the affected areas on the scalp. Each participant’s hair was also washed and any shed hairs were counted. Researchers found that women who took an MPS experienced a significant amount of hair growth in the areas affected by hair loss and less shedding.

The bottom line: Biotin can only impact hair growth if there is an existing biotin deficiency. Taking extra biotin supplements does not lead to extra nutrient-based hair growth.8

How much biotin should I take for hair?

Based on general guidance, it’s recommended people take between 2,000 and 5,000 mcg of biotin as a supplement to strengthen hair shafts and potentially see positive hair results.9

If you are planning on taking biotin for hair growth or beard growth, speak to your GP first, especially if you are experiencing hair loss. Seeking professional medical will help to diagnose the cause of your hair loss and recommend a suitable treatment.

How long does biotin for hair growth take to work?

If you have a biotin deficiency, for instance, some women can be slightly deficient in biotin when they are pregnant or breastfeeding, it can take several months for you to start seeing a difference with your hair. The improvements are likely to be subtle too.10

Can biotin cause hair loss?

Although biotin deficiency is considered to be rare, it can result in hair loss that can be addressed with supplementation. If you have symptoms of biotin deficiency or are thinking of taking it, be sure to talk with a medical professional to assess your levels and discuss what's best for you.11

It's possible for people who drink excessive amounts of alcohol or eat a lot of raw egg whites to develop a biotin deficiency. Genetic disorders and smoking can also potentially cause lead to a reduction in biotin within the body.

You’re also more prone to developing a biotin deficiency if you have a condition that impacts your digestive tract, such as an inflammatory bowel disease or bacterial overgrowth within your small intestine. This is due to the fact that biotin is naturally produced by certain gut bacteria that are present within the intestines - any condition that throws off the microbes in there can impact the effective production of biotin.12

Symptoms of biotin deficiency:

  • Thinning hair
  • Brittle nails
  • Dry skin
  • A red scaly rash (especially around the eyes, nose and mouth)
  • Conjunctivitis
  • Exhaustion
  • Hallucinations
  • Numbness and tingling of the arms and legs

While being deficient in biotin is considered to be rare, it can sometimes result in hair loss that can possibly be helped by taking biotin supplements. Again, make sure you speak to your GP first before taking biotin supplements.

What are the side effects of biotin?

Most people can take biotin supplements without experiencing any side effects. However, it is possible for people to take them and experience13:

  • Nausea
  • Diarrhoea
  • Cramping

If you do happen to experience any of these side effects, then you may want to take your biotin supplements with food, as it’s thought that this can help minimise these issues. Following the recommended guidance from your GP and the manufacturer, and making sure you stick to the dosage, will also help minimise the likelihood of you experiencing side effects.

If you happen to have any extra biotin in your body, it will naturally be flushed out of your system when you urinate. As a result, overdosing on biotin is considered to be rare however, it is still a possibility. Symptoms of biotin overdose include14:

  • Low Vitamin C levels
  • Low Vitamin B-6 levels
  • High blood sugar levels
  • Drop in insulin production

Does biotin only potentially help with hair growth?

No, people do take biotin for other things too which, unlike the link between biotin and hair growth, are backed up with more evidence.15

One of the main benefits of taking biotin is that it can support a healthy metabolism. Biotin converts glucose from carbohydrates into energy for the body and aids amino acids in carrying out normal bodily functions.

Other biotin benefits:

  • Supporting cognitive function
  • Maintaining normal blood sugar in people with diabetes
  • Increasing ‘good’ HDL cholesterol and reducing ‘bad’ LDL cholesterol levels

To sum things up…

Biotin is believed to help support our hair, skin and nails, as well as deliver several other health benefits. However, biotin’s ability to help in these three areas, particularly hair, is yet to be widely proven.

It’s possible to get all the biotin you need, simply by eating a healthy, balanced diet, as there’s a wide range of biotin-rich food out there (the examples above are literally the tip of the iceberg). Biotin deficiencies are rare and it’s impossible to have too much of it in your system because your body naturally gets rid of an excess biotin when you urinate.

If you’re planning on taking biotin supplements for hair loss or beard thinning, seek medical advice first to try and identify the root cause of the problem.

We hope that you’ve found this article useful and that it’s helped answer some of the questions you may have had in relation to using or taking biotin for hair. If you’re looking for other ways to help boost your hair, check out this article, ‘How to get thicker and longer hair: 10 top hair-boosting tips & tricks.

Last updated: 7 April 2021

Related Articles

  • Visa
  • MasterCard
  • PayPal
  • AmericanExpress
  • ApplePay
  • ClearPay
  • AliPay
  • Instagram
  • Pinterest
  • Facebook
  • Twitter
Copyright © Holland & Barrett Retail Limited, 2024. All rights reserved. hollandandbarrett.com is a trading name of Holland & Barrett Retail Limited,. Registered office: Samuel Ryder House, Barling Way, Nuneaton, Warwickshire CV10 7RH. Registered in England: company no. 2758955. Registered VAT no. 211727395.