Complete Gut Repair & Hormonal Balance System for Acne Male

(6,328) 1 MILLION JARS SOLD

For the first time, you can address 100% of acne causes, inside and outside. All with Norse Organics.

ANCESTRAL INGREDIENTS FOR PERFECT SKIN

ANCESTRAL INGREDIENTS FOR PERFECT SKIN

The world’s most rich and resilient wild nutrients like Norwegian Reindeer Liver and Sea Buckthorn, battle acne from the inside out, and win. We spent two years developing three targeted systems to address each of these root causes. Get rid of acne in 60 days, guaranteed.

(6,328) 1 MILLION JARS SOLD

Complete Gut Repair & Hormonal Balance System for Acne Male

97% Cleared Acne (face/body, adults/teens)*

Fix Acne at The Root in 3 Unique Ways: Hormonal, Gut, & Liver

100% Natural Ingredients used for centuries by Vikings

*60 Day Money Back Guarantee (Because it works)

$248 $99 SAVE 60% NOW

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FROM FLORIDA

2-7 DAYS
DELIVERY

60-DAY MONEY
BACK GUARANTEE

WARNING: Low Stock Notice (512 left)

Due to extreme demand and limited raw materials, this product has already sold out 12 times. Don't miss your chance to take advantage of our limited sale—secure yours now before we sell out again, and your order will be shipped by March 10th.

Refill Ships Every 30 Days

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Included in the Ritual

3 ANCESTRAL VIKING PRODUCTS

1.
Reindeer Organs Acne LIVER & gut repair
Reindeer Organs Acne LIVER & gut repair
  • Free Roaming Reindeer Liver, Nordic Herbs & Nutrients
  • Take 2 capsules daily with your biggest meal
  • Cleanses gut and liver to heal acne from the inside
2.
Ultimate hormonal acne support
Ultimate hormonal acne support
  • Arctic Sea Buckthorn, Nettle, Black Seed ++
  • 2 droppers (2ml) in water daily with your first meal
  • Ancestral remedies for balanced hormones
3.
Ultimate Acne Inflammation Control
Ultimate Acne Inflammation Control
  • Cod Liver Oil from Wild Norwegian Cod
  • Take 5ml (1 tsp) after your last meal of the day
  • Uniquely anti-inflammatory to calm skin down
Image
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ingredients

1. Ultimate Acne Gut Repair & Liver Detox (Male)Serving Size: 3 Capsules

  • Reindeer Liver Powder: 300 mg
  • Milk Thistle Extract (80% Silymarin): 300 mg
  • Turmeric Root Extract (95% Curcuminoids): 250 mg
  • Berberine HCl: 250 mg
  • Dandelion Root Extract (4:1): 200 mg
  • Magnesium (as Magnesium Bisglycinate): 65 mg
  • Zinc (as Zinc Picolinate): 30 mg
  • BioPerine® (Black Pepper Fruit Extract): 5 mg
  • Copper (as Copper Bisglycinate): 2 mg
  • Selenium (as L-Selenomethionine): 100 mcg

2. Ultimate Hormonal Acne Support (Male)
Serving Size: 1 ml

  • Green Tea Extract (10:1): 400 mg
  • Reishi Extract (10:1): 300 mg
  • Nettle Root Extract (10:1): 250 mg
  • Saw Palmetto Extract: 160 mg
  • Sea Buckthorn Berry Extract (10:1): 100 mg
  • Black Seed Oil (Thymoquinone): 50 mg
  • Vitamin D (as Cholecalciferol): 5000 IU (approx. 125 mcg)
  • BioPerine® (Black Pepper Fruit Extract): 5 mg
  • Vitamin K2 (from Menaquinone MK-7): 100 mcg

3. Ultimate Acne Inflammation Control
Serving Size: 5 ml

  • Cod Liver Oil: 4.6 g
  • DHA (Docosahexaenoic Acid): 322 mg
  • EPA (Eicosapentaenoic Acid): 276 mg
  • Vitamin A (from Cod Liver Oil): 1380 mcg RAE
  • Vitamin D (from Cod Liver Oil): 11.5 mcg
  • Vitamin E (as d-alpha tocopherol): 0.48 mg
acne-free IN 60 DAYS OR MONEY BACK

These are the guarantee terms you must follow to be eligible for the satisfaction guarantee:

  • The guarantee only applies to rituals.
  • MAX 1 PER CUSTOMER/ORDER
  • We refund a maximum of 1x ritual per order or customer.
  • FOLLOW USAGE INSTRUCTIONS
  • You have used the products as instructed.

Steps to claim it

  1. Fill out the form.
  2. We will get back to you 2–3 weeks after submission.

Why do we require 60 days of use?
In a clinical study of our ingredients, 79% were completely cured of acne after 90 days. In the same period people got 22% less wrinkle depth. Although many of our customers notice overnight effects, sometimes it takes time to clean out all the dirt in your pores and adjust the oil production and elasticity of your skin.

Shipping & duties

4 warehouse locations

  • New Jersey/Florida 🇺🇸 US (2-5 days), Canada (3-6 days), and Mexico (3-6 days)
  • Amsterdam 🇪🇺 All EU (1-5 days), Switzerland (2-4 days), and
  • Sydney 🇦🇺 Australia (2-4 days), New Zealand (2-4 days), and Singapore (3-6 days)

Shipping terms, taxes and fees

  • Shipping prices Free: Look at the top of the website (newsbar) for the threshold Under the limit: Cost calculated at checkout
  • Taxes and fees Everything is paid except for Switzerland and Norway. You may be subjected to customs here because we ship from the EU and not from within the country.
What results can I expect?

Results may vary for each individual. However, 97% of our customers are satisfied with the product's effects on their Acne. 93% said it was the best product they ever tried.

Some people report results after using it one night. After 8-12 hours.

  • Less redness
  • Oil production calming down
  • No new pimples

Not everyone gets instant results. For some individuals, it may take 30-60 days.

how do i use the Gut Repair & Hormonal Balance System ?

WITH YOUR FIRST MEAL OF THE DAY 
Before your first meal, add one full dropper of Ultimate Hormonal Acne Support to a glass of water to stabilize your oil production. 


Follow it with 3 capsules of Ultimate Gut Repair & Liver Detox to prime your internal filters for the day.


After the meal, take 1 tsp (5ml) of Ultimate Inflammation Control.

- dr. Laurel Ash, naturopath

- dr. Laurel Ash, naturopath

"As a specialist I appreciate Norse Organics and highly recommend these formulas for any patient on an acne healing journey.”

- dr. Laurel Ash, naturopath

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Our return policy is simple, Acne will never return

Our return policy is simple, Acne will never return

Our return policy is simple, Acne will never return

Our return policy is simple, Acne will never return

Our return policy is simple, Acne will never return

Our return policy is simple, Acne will never return

Our return policy is simple, Acne will never return

Our return policy is simple, Acne will never return

“The World's Leading Natural Acne Solution”

Recommended by magazines and universities around the world

Ingredients come first

Every single ingredients in the jar is added with one purpose: To stop acne as fast as possible and leave the skin healthy long term. Making sure acne never returns. All ingredients are added in the most bioavailable and nutrient rich form: Unlike all other brands that add the cheapest version in too low doses.

NO water, fillers or bs

NO water, fillers or bs

Only cold-pressed oils

Only cold-pressed oils

NO HEATING OF OILS

NO HEATING OF OILS

no parabens/ paraffine

no parabens/ paraffine

100% natural/ No chemicals

100% natural/ No chemicals

NON<br>GMO

NON
GMO

NO PESTICIDES/ HERBICIDES

NO PESTICIDES/ HERBICIDES

NO HORMONE DISRUPTORS

NO HORMONE DISRUPTORS

Ultimate Acne Gut Repair & Liver Detox (Male) - +
Reindeer Liver

Reindeer Liver

Nature's most potent multivitamin. Rich in bioavailable Vitamin A, B12, iron, and copper for skin repair.

Milk Thistle

Milk Thistle

Protects and regenerates liver cells to clear excess hormones.

Dandelion Root

Dandelion Root

Stimulates bile flow for toxin elimination.

Curcumin (Meriva®)

Curcumin (Meriva®)

29x more absorbable. Reduces gut inflammation at the source.

Berberine HCl

Berberine HCl

Rebalances gut bacteria, supports metabolic health.

Zinc Picolinate

Zinc Picolinate

Essential mineral for skin healing and immune regulation.

Magnesium

Magnesium

Calms stress response, supports 300+ enzymatic reactions.

Copper

Copper

Synthesizes collagen for scar repair, and activates key antioxidant enzymes to protect skin cells.

SELENIUM

SELENIUM

Master antioxidant, specifically protecting the skin from oxidative damage and environmental toxins

Ultimate HormonalAcne Support (male) - +
GREEN TEA Extract

GREEN TEA Extract

Reduces the greasy shine and inflammation associated with hormonal acne

Reishi Extract

Reishi Extract

The "mushroom of immortality", balances cortisol and calms stress driven breakouts

Saw Palmetto

Saw Palmetto

Blocks DHT, the hormone behind male pattern acne and oily skin.

Nettle Root

Nettle Root

Supports healthy testosterone metabolism, frees bound hormones.

sea buckthorn

sea buckthorn

Rich in 190 bioactive compounds, it nourishes the skin deeply while supporting repair, hydration, and a natural glow.

Black Seed Oil

Black Seed Oil

The remedy for everything except death, powerful 
anti-inflammatory

Vitamin D3 + K2

Vitamin D3 + K2

The hormone-vitamin duo essential for clear skin and hormone production

Inflammation Control - +
Cod Liver Oil

Cod Liver Oil

Rich in EPA/DHA Omega-3s that cool inflammation body-wide. Sourced from pristine Arctic waters.

Vitamin A (from Cod Liver)

Vitamin A (from Cod Liver)

Regulates skin cell turnover, prevents the clogged pores that start acne.

Vitamin D (from Cod Liver)

Vitamin D (from Cod Liver)

Supports immune balance and hormone production, not synthetic D3

Vitamin E

Vitamin E

Powerful antioxidant and natural preservative to maintain the purity and potency of the oil without synthetic additives.

“Stubborn Acne Finally Gone After Years of Pills, Derms, & Expensive Perscription Creams Failed Me”

Transformation to Expect When Battling Acne At It’s Root

FINALLY YOU’LL BE ABLE TO FEEL CONFIDENT AGAIN ABOUT YOUR SKIN WHEN YOUR BODY GOES BACK TO OPTIMAL NUTRITION AND HORMONE BALANCE

1 WEEK

Reindeer Organs, Zinc and Vitamin D are already addressing your nutrient deficiencies and you will notice a big shift already.

Gut Calming Down

Bloating reduces as Berberine and Reindeer Liver restore your gut lining.

Skin Feels Less Inflamed

You’ll start to notice a shift in how your skin feels more calm.

Nutrients Flooding In

Your body will start absorbing the nutrients your skin needs to heal.

1 WEEK

1 MONTH

Cod Liver Oil lowers inflammation and Reindeer Organs rewire your full hormonal system. Creating the optimal platform for skin to heal.

Skin Regeneration Activated

Skin regeneration is already speeding up and the skin starts healing faster.

New Breakouts Slowing Down

As your hormones starts to balance, you’ll see breakouts become milder and less frequent.

Skin Feels Different

Your skin will feel lighter and smoother, you’ll love this feeling.

1 MONTH

3 MONTH

People will not recognize you. If you’ve battled acne, the change in your skin now manifest will cause people to not recognize you!

Breakout Cycled Finally Broken

The hormonal, gut, and inflammation loops feeding your acne are dismantled. New breakouts stopped all together.

Natural Vitality & Glow

Your skin’s health has skyrocketed and this shows. A natural, youthful glow is now the new normal.

People Will Notice the Change

No more avoiding mirrors or canceling plans. People ask what changed. Your skin is no longer the first thing on your mind.

3 MONTH

Our return policy is simple, Acne will never return

Our return policy is simple, Acne will never return

Our return policy is simple, Acne will never return

Our return policy is simple, Acne will never return

Our return policy is simple, Acne will never return

Our return policy is simple, Acne will never return

Our return policy is simple, Acne will never return

Our return policy is simple, Acne will never return

How Norse Organics Attacks Acne At It’s Core And Eradicates it For GOOD

1. Wild Reindeer Organs

Reindeer Organs will balance your hormonal system like it used to for Vikings with perfect skin for centuries.

Reindeers cold-adapted organs equals stronger peptides. They are forced to produce unique compounds like Cryoprotective peptides and cold-shock protein.

ULTRA-HIGH in Carnitine. Move fatty acids into the mitochondria, healing acne on a cellular level.

Roam above the arctic circle far away from civilization and are free of heavy metals, micro-plastics and toxins.

Reindeer infographic
LONG -40° WINTERS
ReinDeer must survive extreme temperatures for months without food
EAT ARCTIC PLANTS
ReinDeer access superfood nutrition far from pollution
MONTHS WITHOUT SUN
In winter there is no sun in the Arctics. Imagine the resilience to go through months of darkness
NUTRITIONAL BOMBS
ReinDeer pack their organs with nutrition to survive extreme temperatures
ANCIENT TRADITION
For Vikings, ReinDeer organs were never “meat”, they were medicine and war rituals
Martin H. (32) Verified Buyer

Chronic acne has been a massive hit to my confidence for a long time. I’ve tried countless products with zero luck until this. The relief from the redness and irritation was almost immediate. If you're tired of wasting money on stuff that doesn't work, this is the real deal.

2. Ultra-Potent Herbs For Hormonal Balance

Top 5 herbs for hormonal balance in big clinical doses paired with Vitamin D3 + K2 to instantly stop hormonal acne at its core.

Used for 1,000s of years by Vikings known for their glowing skin.

Thousands of PubMed studies confirms what the Vikings already knew. This is one of the core building blocks for clear skin.

In the most BIO-AVAILABLE and
ULTRA-POTENT form: 10-200x Tincture extraction with Black Seed Oil for optimal absorption.

“I’ve NEVER seen something work this well before”

Chris R. (55) Verified Buyer

Tired of the 'doctor recommended' stuff that never works. My skin has been a mess for years, but this actually tackled the redness and cystic acne at the source. It’s the only thing that’s made a real difference. If you’re struggling with your skin, stop wasting time and get this.

Acne Killer Ritual Launch Sale
TRY IT NOW!
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3. Cod Liver Oil from Wild Norwegian Cod

Makes inflammation drop like a stone and makes acne fade.

Celebrated by Vikings for thousands of years. It swims in arctic waters surviving freezing temperatures.

The most effective way to lower inflammation, one of the root cause of your frustrating acne.

Full of hyper-potent and bio available Omega-3 fatty acids (DHA & EPA)

Reindeer infographic
near-freezing waters
To survive, their cell membranes must remain flexible at very low temperatures. Leads to sky high omega-3s (EPA & DHA)
EAT PLANKTON
Arctic cod sit low on the food chain and is not a hunter. Meaning it has lower heavy-metal accumulation
SWIM CONSTANTLY
They never rest which makes they mitochondria highly active. And swim for months of darkness in the arctics
store nutrients in the liver
Cod is very lean compared to fatty fish like salmon. Fat soluble nutrients is therefore packed in its liver
ancient tradition
Cod Liver was a celebrated food source by Vikings who ate it to be strong and free of disease
Acne Killer Ritual Launch Sale
TRY IT NOW!
DEAL ENDING IN: 00:00:00

No Other Solution on Earth Can Clear Acne Like These Ancestral Viking Ritual

NORSE ORGANICS CLEARS ACNE IN 3 UNIQUE WAYS:

99% of solutions out there don’t work because of this and that’s why you’ll never get results and keep wasting your money forever.

Feature image

1. Strengthens the Gut/Liver Waste Flush System.

When your gut lining is weak or your liver is sluggish, hormones and toxins are not properly eliminated so. that trash is pushed through your pores, leading to acne and other skin conditions.

The Milk Thistle fuels you liver cells while the Reindeer Liver provides the raw materials to repair your gut lining. When your gut lining and liver are balanced, you'll see no more "trash" coming through your pores.

Feature image

2. The Ultimate Inside - Out Acne Killer System.

Norse Organics has been the most effective natural solution for acne. We've helped thousands achieve clear skin with our Arctic botanical formulas. But we knew topicals were only half the battle, so we spent two years developing three targeted systems to address each of the root causes of acne. 
Now, for the first time, you can treat acne from the inside AND outside, all with Norse Organics.

Feature image

3. Stops the Hormonal Imbalance in Days (The Real Problem for Skin)

Acne is a chemical reaction. When your hormones are imbalanced (Androgens like DHT), they create an overproduction of sebum (oil) that trap dead skin cells inside your pores. Without correcting the hormonal signaling from the inside, no amount of face washing will stop the pores from clogging.

Saw Palmetto and Spearmint are clinically shown to naturally block the enzymes that create excess DHT stopping the oil over production at the source.

SAVE 19% NOW!

500,000+ happy results 60 day money-back guarantee

TOP 10 QUESTIONS ABOUTNORSE SUPPLEMENTS

1. HOW LONG TO SEE RESULTS?

Most people feel reduced bloating and less skin redness within the first 24-48 hours. For deep cystic acne and scarring, the "Gut-Sealing" process takes time. You should expect significant, permanent clearing around the 30 to 45-day mark.

2. WHO IS THIS FOR?

This is for anyone who feels like they’ve "tried everything" (antibiotics, creams, 10-step routines) and still gets breakouts. Specifically, it’s for people struggling with hormonal acne, cystic flare-ups, and chronic bloating. If your skin gets worse with stress or food, this is for you.

3. ARE THERE ANY SIDE EFFECTS?

Because Norse opens your body’s natural "detox pathways," some people experience a mild purge in the first week as toxins leave the body. This is a good sign. It means the internal fire is finally being pushed out. It typically clears up within days, leaving new, healthy skin behind.

4. DOES IT NEED TO BE CYCLED?

No. Unlike synthetic hormones or harsh medications, Norse is whole-food nutrition. Your gut and skin face modern toxins every single day, so they need daily defense. You can take it indefinitely to maintain your results.

5. WILL IT HELP WITH BLOATING & PUFFINESS?

Yes. This is the #1 bonus benefit customers report. By sealing the gut lining with Omega-7, we stop the inflammatory leaks that cause water retention.

6. WILL IT INTERFERE WITH MY MEDICATIONS (ACCUTANE/ANTIBIOTICS)?

Norse is 100% natural wild food, not a synthetic drug. It is generally safe to take alongside other treatments. In fact, many people use it Post-Accutane or Post-Antibiotics to repair the gut damage those drugs caused. However, always consult your doctor if you are on heavy medication.

7. DOES IT COME WITH A GUARANTEE?

100% Yes. We offer a 60-Day "Clear Skin or Money Back" Guarantee. You can use the entire bottle. If you look in the mirror and don't see a transformation, we refund you.

8. IS THERE ANY WHEAT, SOY, OR NUTS?

Zero. We are strictly Gluten-Free, Soy-Free, Nut-Free, and Dairy-Free. We know that these are common acne triggers, so we keep our facility 100% clean of them.

9. HOW IS THIS DIFFERENT FROM "ZINC" OR "VITAMIN E" PILLS?

Most store-bought vitamins are synthetic isolates (made in a lab). Your body doesn't recognize them, so you pee them out. Norse uses Whole-Food Wild Extracts. Your body recognizes the DNA of the plant and absorbs it immediately.

10. WHAT IF I DON'T HAVE "CYSTIC" ACNE?

It still works. Even if you just have "annoying" whiteheads, oily skin, or redness, these are all signs of internal inflammation. The ritual lowers your baseline inflammation, making your skin look tighter, brighter, and more ruggedly healthy, regardless of how bad your acne started.

"If we don't help you, we don'twant your money!"

"If we don't help you, we don'twant your money!"

If our products don't help you improve your skinwithin 60 days of daily use, we don't want yourmoney. We know that our solution is extremelyeffective. But we also know that it's not going towork for everyone and their mother.

  1. Androgen Modulation Through Spearmint Tea: Exploring Effects in PCOS and Non-PCOS Populations. Journal of the Academy of Nutrition and Dietetics. 2024. 150-participant randomized controlled trial, 12 weeks. https://www.jandonline.org/article/S2212-2672(24)00364-2/fulltext
  2. Saeidi S, Ghanadian SM, Poostiyan N, Soltani R. Evaluation of the effectiveness of Berberis integerrima Bunge root extract combined with spearmint essential oil in the treatment of acne vulgaris: A randomized controlled clinical trial. J Cosmet Dermatol. 2024 Jul;23(7):2458-2466. doi: 10.1111/jocd.16291. Epub 2024 Mar 28. PMID: 38545754. https://pubmed.ncbi.nlm.nih.gov/38545754/
  3. Dobrev H. Clinical and instrumental study of the efficacy of a new sebum control cream. J Cosmet Dermatol. 2007;6(2):113-8. doi: 10.1111/j.1473-2165.2007.00306.x. PMID: 17524128. 20 volunteers, 4 weeks. https://pubmed.ncbi.nlm.nih.gov/17524128/
  4. Marks LS, Hess DL, Dorey FJ, Luz Macairan M, Cruz Santos PB, Tyler VE. Tissue effects of saw palmetto and finasteride: use of biopsy cores for in situ quantification of prostatic androgens. Urology. 2001;57(5):999-1005. PMID: 11337315. 40-man randomized controlled trial, 6 months. https://pubmed.ncbi.nlm.nih.gov/11337315/
  5. Fujita R, Liu J, Shimizu K, Konishi F, Noda K, Kumamoto S, Ueda C, Tajiri H, Kaneko S, Suimi Y, Kondo R. Anti-androgenic activities of Ganoderma lucidum. Journal of Ethnopharmacology. 2005;102(1):107-112. PMID: 16076559. 75% decrease in uptake of DHT. https://pubmed.ncbi.nlm.nih.gov/16076559/
  6. Akihisa T, Nakamura Y, Tagata M, Tokuda H, Yasukawa K, Uchiyama E, Suzuki T, Kimura Y. Anti-inflammatory and anti-tumor-promoting effects of triterpene acids and sterols from the fungus Ganoderma lucidum. Chemistry & Biodiversity. 2007;4(2):224-231. PMID: 17311233. 88.2% reduction in nitric oxide production (ganodermanontriol). https://pubmed.ncbi.nlm.nih.gov/17311233/
  7. Obertreis B, Giller K, Teucher T, Behnke B, Schmitz H. Anti-inflammatory effect of Urtica dioica folia extract in comparison to caffeic malic acid. Arzneimittelforschung. 1996;46(1):52-56. PMID: 8821518. https://pubmed.ncbi.nlm.nih.gov/8821518/
  8. Teucher T, Obertreis B, Ruttkowski T, Schmitz H. Cytokine secretion in whole blood of healthy subjects following oral administration of Urtica dioica L. plant extract. Arzneimittelforschung. 1996;46(9):906-910. PMID: 8967906. https://pubmed.ncbi.nlm.nih.gov/8967906/
  9. Yang, B. et al. "Effects of Oral Supplementation and Topical Application of Supercritical CO₂ Extracted Sea Buckthorn Oil on Skin Ageing of Female Subjects." Journal of Applied Cosmetology, vol. 27, 2008, pp. 1–13.
  10. Abdullahzadeh, M. & Shafiee, S. "To Compare the Effect of Sea Buckthorn and Silver Sulfadiazine Dressing on Period of Wound Healing in Patients with Second-Degree Burns: A Randomized Triple-Blind Clinical Trial." Wound Repair and Regeneration, vol. 29, no. 5, 2021, pp. 732–740. doi: 10.1111/wrr.12916
  11. Boca, A.N. et al. "Sea Buckthorn Extract in the Treatment of Psoriasis." Experimental and Therapeutic Medicine, vol. 17, no. 2, 2019, pp. 1020–1023. doi: 10.3892/etm.2018.6983
  12. Soleymani S, Farzaei MH, Zargaran A, Niknam S, Rahimi R. Promising plant-derived secondary metabolites for treatment of acne vulgaris: a mechanistic review. Arch Dermatol Res. 2020;312(1):5-23. / Soleymani S et al. Phytother Res. 2020. RCT, 60 patients, double-blind, placebo-controlled. Nigella sativa hydrogel (thymoquinone), twice daily, 60 days. 78% mean reduction in IGA score vs 3.3% placebo. https://pubmed.ncbi.nlm.nih.gov/31745627/
  13. Faghihi G, Iranmanesh Z, Abtahi-Naeini B. Topical Nigella sativa (black seed) for hand eczema: a double-blind randomized clinical trial. J Dermatolog Treat. 2012. 19 patients, 2% black seed oil cream, twice daily, 4 weeks. DLQI: 75% improvement. HECSI: 75% improvement. Matched betamethasone steroid efficacy. https://pubmed.ncbi.nlm.nih.gov/22375794/
  14. Ahmed Jawad H, Ibraheem YG, Taher KI, Al-Qaisi ZH. Effect of Nigella sativa oil on psoriasis: a clinical study. J Clin Exp Invest. 2014;5(2):221-226. 60 patients, mild-to-moderate plaque psoriasis, 12 weeks. 10% NS ointment + 500mg oral capsule 3×/day. 62.1% mean PASI reduction. 85% good-to-complete response. 18% relapse rate.
  15. Ruikchuchit T, Juntongjin P. Role of vitamin D supplement adjunct to topical benzoyl peroxide in acne: a randomized double-blinded controlled study. Int J Womens Dermatol. 2024 Jul 1;10(3):e163. doi: 10.1097/JW9.0000000000000163. PMID: 38957412. 44-subject RCT, 16 weeks. https://pubmed.ncbi.nlm.nih.gov/38957412/
  16. Lee DY, Yamasaki K, Rudsil J, Zouboulis CC, Park GT, Yang JM, Gallo RL. Sebocytes express functional cathelicidin antimicrobial peptides and can act to kill Propionibacterium acnes. J Invest Dermatol. 2008 Jul;128(7):1863-6. doi: 10.1038/sj.jid.5701235. PMID: 18200058. In vitro, human sebocytes. https://pubmed.ncbi.nlm.nih.gov/18200058/
  17. Singh S, Khanna D, Kalra S. Association between serum levels of vitamin D and acne: A systematic review. J Cosmet Dermatol. 2021. PMID: 34319007. Observational data showing 4-fold higher prevalence of vitamin D deficiency in acne patients vs. healthy controls. https://pubmed.ncbi.nlm.nih.gov/34319007/