The Science of Skincare: 6 Supplements for Radiant, Healthy Skin

| Modified on Apr 20, 2023
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Glowing Skin and Vitamin C

Maintaining healthy skin is essential as it reflects our overall health. A balanced diet, regular exercise, and proper hydration are essential for skin wellness. However, certain supplements can offer additional benefits to enhance the skin's appearance.

This article explores six top skincare supplements for healthy skin based on research.  We'll cover their unique advantages, how they work, and the recommended dosages for promoting a healthy complexion. These supplements include Vitamin C, Collagen, Biotin, Vitamin E, Omega-3 Fatty Acids, and Coenzyme Q10 (CoQ10). Additionally, we'll discuss apple cider vinegar, the most popular home remedy on Earth Clinic for healthy skin, based on our readers' feedback.

1. Vitamin C

Vitamin C, also known as ascorbic acid, is one of the most popular and well-researched supplements for improving skin health. It's a potent antioxidant that protects the skin from damage caused by free radicals, which can lead to premature aging and a dull complexion.1 Vitamin C is critical in collagen synthesis, helping maintain skin elasticity and firmness.2

Recommended Dosage

The recommended daily vitamin C intake varies depending on age and gender, but a dosage of 75-90 mg per day is suggested for most adults.3 It's important to note that vitamin C is water-soluble, meaning that excess amounts are easily excreted by the body, making it necessary to consume it regularly for optimal skin health.

2. Collagen

Collagen is the most abundant protein in the human body and a major component of the skin, providing structure and strength.4 As we age, our bodies produce less collagen, leading to a loss of skin elasticity and the appearance of wrinkles. Supplementing with collagen has been shown to improve skin hydration, and elasticity, and reduce the appearance of fine lines and wrinkles.5

Recommended Dosage

Although there is no standardized dosage for collagen supplements, studies suggest that consuming 2.5 to 10 grams of hydrolyzed collagen daily can benefit skin health.6 For optimal results, you should look for a high-quality collagen supplement, such as one derived from grass-fed, pasture-raised animals or a marine source.

3. Biotin

Biotin, also known as vitamin H, is part of the B-vitamin family and plays a vital role in maintaining healthy skin, hair, and nails.7 A biotin deficiency can lead to various skin issues, such as rashes, dryness, and inflammation.8 While biotin is found in many foods, supplementation can ensure adequate intake for optimal skin health.

Recommended Dosage

The adequate daily intake of biotin for adults is 30 micrograms.9 Biotin is a water-soluble vitamin, so excess amounts are typically excreted by the body. However, it's important to consult with a healthcare professional before starting any supplementation, as high doses of biotin may interfere with certain lab tests.10

4. Vitamin E

Vitamin E is a fat-soluble antioxidant crucial in protecting the skin from oxidative stress caused by free radicals and environmental pollutants.11 Vitamin E also has anti-inflammatory properties, which can help soothe and heal damaged skin.12

Research indicates that combining vitamin E with vitamin C can enhance its antioxidant effects and protect the skin from damage.13

Recommended Dosage

The recommended daily intake of vitamin E for adults is 15 mg (22.4 IU) per day.14 Some studies have used higher doses for specific skin conditions, but it's crucial to consult with a healthcare professional before taking higher amounts, as excessive vitamin E intake can lead to negative side effects.15

5. Omega-3 Fatty Acids

Omega-3 fatty acids, particularly EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid), are essential nutrients known for their anti-inflammatory properties.16 These fatty acids contribute to skin health by regulating oil production, maintaining skin barrier function, and reducing inflammation, which can help alleviate conditions like acne, eczema, and psoriasis.17 Omega-3s can be obtained from fatty fish, such as salmon and mackerel, as well as from fish oil or algal oil supplements.

Recommended Dosage

There is no established daily intake for EPA and DHA, but the American Heart Association recommends consuming at least two servings of fatty fish per week, which equates to roughly 500 mg of combined EPA and DHA daily.18 If you choose to supplement with fish oil or algal oil, ensure the product is of high quality and undergoes third-party testing for purity and potency.

6. Coenzyme Q10 (CoQ10)

Coenzyme Q10, or CoQ10, is a naturally occurring antioxidant in the body that plays a vital role in cellular energy production and combating oxidative stress.19 As we age, CoQ10 levels in the skin decrease, reducing antioxidant protection and increasing signs of aging.20 Supplementation with CoQ10 has been shown to improve skin texture, reduce the appearance of wrinkles, and protect against photodamage caused by UV exposure.21

Recommended Dosage

There is no established daily intake for CoQ10, but studies have used doses ranging from 50 to 200 mg per day with beneficial effects on skin health.22  It's important to choose a high-quality CoQ10 supplement and consult a healthcare professional before starting any supplementation, as CoQ10 may interact with certain medications.

Apple Cider Vinegar: Top Home Remedy for Glowing Skin

Apple cider vinegar (ACV), is the most popular natural remedy for promoting glowing skin among Earth Clinic readers. Made from fermented apples, it contains various beneficial substances, such as acetic acid, vitamins, minerals, and enzymes. ACV has been used for centuries for its potential health benefits, which include its antibacterial, anti-inflammatory, and antioxidant properties. Here's how apple cider vinegar can contribute to achieving a radiant complexion:

Balancing Skin pH

ACV is acidic, which helps balance the skin's pH levels, maintaining a healthy acid mantle. A balanced pH is essential for keeping the skin's natural barrier intact, protecting it from environmental damage and harmful bacteria. Using diluted apple cider vinegar as a toner can help restore the skin's pH and promote a more even and glowing complexion.

Exfoliating and Brightening

Apple cider vinegar contains natural alpha-hydroxy acids (AHAs), which work as gentle exfoliants. AHAs help remove dead skin cells, unclog pores, and reveal fresher, more radiant skin underneath. Regular use of diluted ACV can improve skin texture, reduce hyperpigmentation, and brighten the complexion.

Antibacterial and Anti-inflammatory

ACV has antibacterial and anti-inflammatory properties that can help combat acne and reduce redness and inflammation. It may help control excess oil production, prevent acne breakouts, and soothe irritated skin. Applying diluted apple cider vinegar to the affected areas can assist in reducing blemishes and promoting clearer skin.

How to Use Apple Cider Vinegar for Glowing Skin

Using raw, unfiltered apple cider vinegar with "the mother" is important for maximum benefits. "The mother" contains beneficial bacteria, enzymes, and proteins contributing to its health-promoting properties. To use ACV for skincare:

  1. Mix equal parts of raw, unfiltered apple cider vinegar with water. For sensitive skin, you may want to start with a higher water-to-ACV ratio (e.g., 3 parts water to 1 part ACV) to reduce potential irritation.
  2. Apply the diluted solution to a cotton pad and gently swipe it across your cleansed face, avoiding the eye area.
  3. Let it sit for a few minutes before rinsing it off with lukewarm water.
  4. Follow up with your regular skincare routine, including a moisturizer.

It's recommended to patch-test the diluted ACV solution on a small area of skin before using it on your face to ensure you don't have an adverse reaction. Always consult with a dermatologist or healthcare professional before incorporating apple cider vinegar or any new natural remedy into your skincare routine, especially if you have sensitive skin or a pre-existing skin condition.

Continue reading below to learn more glowing skin remedies that have worked for our readers, such as apple cider vinegar, turmeric, and more! Let us know what worked for you!


  1. Pullar JM, Carr AC, Vissers MCM. The Roles of Vitamin C in Skin Health. Nutrients. 2017 Aug 12;9(8):866.
  2. Telang, P. S. (2013). Vitamin C in dermatology. Indian Dermatology Online Journal, 4(2), 143-146.
  3. Office of Dietary Supplements - Vitamin C. (2021). Retrieved from
  4. Varani, J., Dame, M. K., Rittie, L., Fligiel, S. E., Kang, S., Fisher, G. J., & Voorhees, J. J. (2006). Decreased collagen production in chronologically aged skin: roles of age-dependent alteration in fibroblast function and defective mechanical stimulation. The American Journal of Pathology, 168(6), 1861-1868.
  5. Proksch, E., Segger, D., Degwert, J., Schunck, M., Zague, V., & Oesser, S. (2014). Oral supplementation of specific collagen peptides has beneficial effects on human skin physiology: a double-blind, placebo-controlled study. Skin Pharmacology and Physiology, 27(1), 47-55.
  6. Choi, F. D., Sung, C. T., Juhasz, M. L., & Mesinkovska, N. A. (2019). Oral Collagen Supplementation: A Systematic Review of Dermatological Applications. Journal of Drugs in Dermatology, 18(1), 9-16.
  7. Zempleni, J., Wijeratne, S. S., & Hassan, Y. I. (2009). Biotin. BioFactors, 35(1), 36-46.
  8. Trüeb, R. M. (2016). Serum Biotin Levels in Women Complaining of Hair Loss. International Journal of Trichology, 8(2), 73-77.
  9. Office of Dietary Supplements - Biotin. (2021).
  10. Mayo Clinic - Biotin. (2021).
  11. Keen, M. A., & Hassan, I. (2016). Vitamin E in dermatology. Indian Dermatology Online Journal, 7(4), 311-314.
  12. Schagen, S. K., Zampeli, V. A., Makrantonaki, E., & Zouboulis, C. C. (2012). Discovering the link between nutrition and skin aging. Dermato-Endocrinology, 4(3), 298-307.
  13. Al-Niaimi, F., & Chiang, N. (2017). Topical Vitamin C and the Skin: Mechanisms of Action and Clinical Applications. The Journal of Clinical and Aesthetic Dermatology, 10(7), 14-17.
  14. Office of Dietary Supplements - Vitamin E. (2021).
  15. Mayo Clinic - Vitamin E. (2021).
  16. Simopoulos, A. P. (2002). Omega-3 fatty acids in inflammation and autoimmune diseases. Journal of the American College of Nutrition, 21(6), 495-505.
  17. Kiecolt-Glaser, J. K., Belury, M. A., Andridge, R., Malarkey, W. B., & Glaser, R. (2011). Omega-3 supplementation lowers inflammation and anxiety in medical students: a randomized controlled trial. Brain, Behavior, and Immunity, 25(8), 1725-1734.
  18. American Heart Association. (2018). Fish and Omega-3 Fatty Acids. Retrieved from
  19. Kalén, A., Appelkvist, E. L., & Dallner, G. (1989). Age-related changes in the lipid compositions of rat and human tissues. Lipids, 24(7), 579-584.
  20. Inui, M., Ooe, M., Fujii, K., Matsunaka, H., Yoshida, M., & Ichihashi, M. (2008). Mechanisms of inhibitory effects of CoQ10 on UVB-induced wrinkle formation in vitro and in vivo. BioFactors, 32(1-4), 237-243.
  21. Žmitek, K., Pogačnik, T., Mervic, L., Žmitek, J., & Pravst, I. (2016). The effect of dietary intake of coenzyme Q10 on skin parameters and condition: Results of a randomized, placebo-controlled, double-blind study. BioFactors, 42(6), 647-656.
  22. Langsjoen, P. H., & Langsjoen, A. M. (2014). Comparison study of plasma coenzyme Q10 levels in healthy subjects supplemented with ubiquinol versus ubiquinone. Clinical Pharmacology in Drug Development, 3(1), 13-17.

Related Links:

8 Vitamin C Benefits (and Some Common Side Effects)

Apple Cider Vinegar for Glowing Skin

6 User Reviews
5 star (6) 

Posted by Deirdre (Asheville) on 04/18/2023
5 out of 5 stars

I've used ACV on and off for at least twenty years now. Yes, it definitely gives the skin a healthy glow! The only thing that comes close to ACV in my personal experience is a combination of biosil and collagen supplements. I use ACV capsules now. Not quite as good as the liquid, but easy to take daily.

Replied by Maureen
(UK Lancashire)
3 posts

Hi, would you mind telling me how you use ACV for skin please? I have bottles of it which I use for cooking. Thank you

Apple Cider Vinegar for Glowing Skin
Posted by Kara (London) on 05/04/2017
5 out of 5 stars

Yes true true, apple cider vinegar will cause glowing skin. I have used it for years. I drink a teaspoon of apple cid vin in warm water in the morning (whereas other people who practice Ayurveda drink lemon juice in warm water first thing in the morning). I also drink it JUST before working out. Also, on occasion I use it as my alpha hydroxy before apply a mask. To do this I saturate a cotton ball with vineger, apply all over my face but avoid just underneath my eyes. Leave for a couple of minutes, wash off with warm water. Then I apply a mask (ingredients depend on whether it's winter or summer). Glowing skin!

Apple Cider Vinegar for Glowing Skin
Posted by Tina (Danbury, Ct) on 08/25/2014
5 out of 5 stars

Apple cider vinegar is my all time glowing skin remedy. I put 2 teaspoons of ACV in a glass of room temperature filtered water and drink it 20 minutes before dinner and then another glass 20 minutes before going to bed. It helps digest fat and improves circulation... at least for me.

Replied by Veena Morales
(Denver Colorado)

I only take apple cider to reduce high blood pressure. I've read from some forums that it can irritate the skin when applied directly. I have sensitive skin and I cannot just apply anything without making sure that the stuff will not cause more damage than help.

Replied by Diamond
(Ma., US)
5 out of 5 stars

When we consume medicinal (healing) items via inside our bodies generally should be good enough, meaning if your skin is sensitive then drinking a little ACV should be sufficient enough.What works inside the body most times works just a well outside the body etc.Good Luck.

Replied by Umar
(Lahore, Pakistan)

Is drinking Apple Cider Vinegar safe for people suffering from high blood pressure?

Replied by Little Wing
(Boston, Ma)

My friend's mom started taking ACV daily to deal with heartburn/GERD and a side effect was that her blood pressure was lowered. I've read quite a bit of information on people who have used it for this. Good luck.

Replied by Lydia
5 out of 5 stars

ACV is a good natural supplement that helps in many health problems. High blood pressure is just one of them. It is a good detox regimen too. Mix pure water with ACV and raw honey and drink 8 oz. daily.

Apple Cider Vinegar for Glowing Skin
Posted by Penny (Edmonton, Ab, CA) on 08/22/2014
5 out of 5 stars

I use 1 tsp apple cider vinegar in a glass of water and pour some on a cloth and wipe my face with the cloth. Allow to air dry. My face is clearing up nicely.

Baking Soda, Honey and Egg White Mask

1 User Review
5 star (1) 

Posted by Bianca (Quezon City ) on 06/17/2017
5 out of 5 stars

I'm used baking soda for more than a month. But not just baking soda alone I mixed it with pure honey and the white of egg mix them together and using it as my face mask everyday before taken a bath. Apply nicely rub so gently on my face circular motion until I'm feel it's tighten and leave on my face up to 30 minutes. Rinse with warm water then cold after to close the poreses..,, My skin look radiant rosy smooth and it's tighten. I love it! My family and friends they noticed the changes Of skin on my face. So easy and no need to go to any derm clinic. It's so natural way, very helpful.

Replied by Sharon

Can you please share the amounts used to make the treatment.



Coffee Scrub

1 User Review
5 star (1) 

Posted by Mama To Many (Tennessee) on 05/01/2017
5 out of 5 stars

A friend of mine asked me if I had tried using a coffee scrub. So I was intrigued and made some up to try it.

Coffee Scrub Recipe (Ingredient amount approximate)

  • 2 tablespoons ground coffee
  • ¼ cup sugar
  • 1 tablespoon castor oil
  • 1 tablespoon coconut oil
  • ¼ teaspoon vanilla extract

Melt the coconut oil (or soften to almost melted.) Stir in the castor oil. Stir in sugar, coffee and vanilla. Store in a small jar in your bathroom.

So, coffee scrub is supposed to exfoliate skin and make it soft and get rid of cellulite. I can attest to the first two but think it would need to be used regularly for a while to see if it reduces cellulite.

I just scooped some out and used it like soap and a washcloth.


This stuff smells amazing. And after I use it, my bathroom smelled wonderful for hours.

It feels invigorating to the skin.

Skin is very soft after a shower with it!


This might be harsh for sensitive skin or the face. (I haven't tried in on my face.)

It makes a mess! Keep a cup in your shower to rinse out the coffee after you rinse off.

It leaves the tub slick! I sprinkled baking soda in the tub (borax would work well here, too) after I showered and left it there so the next “showeree" wouldn't slip in the tub. Do a full cleaning of the tub if the next person who will be using it has poor balance or for the elderly!

I think you shouldn't make up a large batch. I suspect that water that gets into the container when you are scooping out some scrub will end up causing the coffee to mold over time. Eeewwww.

But overall I love it! Oh, and I stepped on a wasp (in my house! ) the other night. Last night my foot was itching terribly from it, so I used some coffee scrub on my foot and it did give some temporary relief.

I also used it to wash my hands one day just because. This is probably a good hand cleaner for grimy hands that won't leave them dried out.

Let me know what you think if you try it!
~Mama to Many~

Dietary Changes for Glowing Skin

1 User Review
5 star (1) 

Posted by Chloe (Los Angeles, Ca, Usa) on 08/25/2014
5 out of 5 stars

My skin started to improve radically and glow after I became a vegan in 2010. I eat a lot of fresh produce (organic if possible) and drink wheatgrass juice once a day. There's a juice place near my apartment so I don't have to grow the wheatgrass myself. I also drink 2 BIG sports bottles of water during the day too. Water, water, water!


1 User Review
5 star (1) 

Posted by Susanmorgan (Sc) on 01/15/2017
5 out of 5 stars

I use honey for my skin care routine and I think it is the best home remedy to get glowing and acne free skin.

Lemon Juice for Glowing Skin

1 User Review
5 star (1) 

Posted by Alicia (Atlanta, Ga) on 08/25/2014
5 out of 5 stars

I have never tried drinking apple cider vinegar for glowing skin, but I will now after reading the reviews. When my face needs a pick me up (before going to a party typically), I cleanse my skin and then apply fresh squeezed lemon juice. I don't wash it off. It's a natural exfoliant and makes my face smooth and dewy within minutes.

Moringa Hydrosol With DMSO

1 User Review
5 star (1) 

Posted by Gary (Georgia) on 04/20/2023
5 out of 5 stars

I have found that something that I had created in Indonesia actually works quite well for skin and makes it look vibrant and healthy.

Moringa hydrosol with 70/30 DMSO added does wonders for making the skin look brighter.

Use 2x daily, applied with organic cotton.

Oil Mix

1 User Review
5 star (1) 

Posted by Lebon (South Africa) on 04/10/2015
5 out of 5 stars

I have an oil mix that I have been using to great effect. Virgin Coconut oil (Lauric Acid) +Avocado oil (mostly Omega 6) +Macadamia nut oil (mostly Omega 9 + fair amount of Omega 7).

The MCT of coconut oil helps the absorption of omegas.

As you can see these oils complement one another and the combination does wonders for my normal to dry skin.

I have also found that drinking these oils stop the inflammation of the mucus membrane that keeps your nose congested. If you intend to drink them buy the cooking grade of the oils, they can also be applied on the skin.

Apply 2x a day and notice the difference in 2 -3 weeks.

Oil Pulling

1 User Review
5 star (1) 

Posted by Katzie (Calgary) on 05/17/2021
5 out of 5 stars

Just the other day I was lamenting turning 55 and the brown spots on my lower cheeks, saggy skin, and dark eyes. I started OP as a way to deal with an infected tooth (it worked), and as of today, I have done it 3 times, for 20 mins each time. Got a foamy mess after each time, meaning it attracted crap from under my gums! Now my immune system is free to battle other places. My mouth feels fantastic!

I much prefer Coconut Oil, mixed with EVOO if I am running out, but EVOO on its own just felt greasy, but I still did it. The foam was yellow. Sesame oil and CO are much better for me. I could never use corn oil after seeing a video on how it's made! Yuck.

But ANOTHER benefit that I haven't seen mentioned enough is to the skin! When I looked in the mirror this morning, I thought an intruder was in the bathroom with me! 'cause I sure as heck did not recognize that lady! My skin is now crystal clear and spot-free. HOW did that happen so quickly?! Oil Puller for Life here!!! Be blessedly healthy, everyone, please!