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THE FOUNDER'S READING LIST

How weformulate.

After years of working on my own skin and talking to thousands of women, I kept coming back to the same four themes: the gut, hormonal activity, inflammation and nutrient gaps. This page is about what we made of them.

FOUR THEMES, FOUR FORMULAS

Where westarted looking.

These four themes are connected — which is why we formulated for all of them rather than picking one and calling it the answer.

01GUT

The microbiome is an active field of research.

The gut-skin axis is one of the most discussed topics in nutrition research. What is undisputed: a great deal happens in the gut that concerns the whole body.

What the microbiome is associated with:

  • Nutrient absorption — you can't use nutrients you don't absorb
  • Hormone metabolism — gut bacteria (the estrobolome) are studied in relation to estrogen
  • Immunity — a large share of the immune system sits in the gut

WHAT IS DISCUSSED HERE

  • The composition of the gut microbiome
  • Fibre and fermented foods in the diet
  • Bowel transit time
  • The effect of antibiotics on gut flora
  • How nutrients are absorbed
02HORMONES

Hormonal activity.

Hormonal activity is one of the four topics we formulated around. Androgens — testosterone, DHEA, DHT — act on the sebaceous glands. Insulin, cortisol and the way the liver and gut process estrogen belong to the same picture.

What we put in the formula:

  • Vitamin B6 — contributes to the regulation of hormonal activity
  • Magnesium — contributes to normal energy-yielding metabolism
  • Zinc — contributes to the maintenance of normal skin

This is a food supplement. It does not treat a condition and does not replace a varied diet.

WHAT IS DISCUSSED HERE

  • How androgens affect sebaceous glands
  • The role of insulin in hormonal activity
  • What happens after coming off hormonal contraception
  • How the liver and gut process estrogen
  • Vitamin B6 and the regulation of hormonal activity
03INFLAMMATION

Inflammation is part of the picture.

Inflammation is a topic that comes up in almost every conversation about skin. What is discussed as influencing it:

  • Diet — sugar, processed foods, industrial seed oils, food sensitivities
  • Stress — chronic cortisol elevation
  • Sleep — sleep deprivation raises inflammatory markers
  • Nutrient supply — omega-3, zinc, vitamin D

WHAT IS DISCUSSED HERE

  • Diet and inflammatory markers
  • The role of sleep
  • Chronic stress and cortisol
  • Omega-3 in the diet
  • Vitamin C and riboflavin contribute to the protection of cells from oxidative stress
04NUTRIENT DEFICIENCIES

Skin needs building blocks.

Nutrient supply is the third topic. Below is what each nutrient in the formula may be linked with under EU Regulation 432/2012 — and nothing beyond that.

What is in the formula, and what may be said about it:

  • Zinc — contributes to the maintenance of normal skin
  • Vitamin A — contributes to the maintenance of normal skin
  • Riboflavin and niacin — contribute to the maintenance of normal skin
  • Vitamin C — contributes to normal collagen formation for the normal function of the skin
  • Six B-vitamins — contribute to the reduction of tiredness and fatigue

Nutrient reference values and the amount per daily portion are printed on the label.

WHAT IS DISCUSSED HERE

  • Zinc contributes to the maintenance of normal skin
  • Vitamin C contributes to normal collagen formation
  • Riboflavin and niacin contribute to the maintenance of normal skin
  • Six B-vitamins contribute to the reduction of tiredness and fatigue
  • Why nutrient reference values matter

THE INSIDE-OUT APPROACH

How to actuallywe formulate.

Five steps. None of them are skincare. All of them are evidence-based — and what we built klarskin around.

  1. 01

    The gut.

    Reduce: Foods you personally react to — for many that means less sugar and fewer processed foods.
    Add: Plant fibres from vegetables, pulses and whole grains.
    Include: Fermented foods such as yoghurt, kefir or sauerkraut.
    Ask: If you have persistent digestive complaints, discuss them with your doctor.

  2. 02

    Balance blood sugar.

    Eat protein and healthy fat with every meal. Avoid naked carbohydrates — always pair with protein or fat. Choose low-glycemic carbohydrate sources. Don't skip meals; maintain steady energy.

  3. 03

    Inflammation.

    Increase omega-3 intake (fatty fish, quality fish oil). Eliminate inflammatory oils (canola, soybean, corn, vegetable). Eat antioxidant-rich foods daily — berries, leafy greens, colorful vegetables. Manage stress through daily practices. Prioritize 7-9 hours of quality sleep.

  4. 04

    Fill nutrient gaps.

    Have key nutrients checked by your doctor (zinc, vitamin D, ferritin, B12). Base your diet on nutrient-dense whole foods. A food supplement adds to a varied diet — it does not replace one.

  5. 05

    Hormonal activity.

    Keep blood sugar steady across the day. Eat cruciferous vegetables regularly — broccoli, kale, brussels sprouts. Reduce exposure to endocrine disruptors (plastics, conventional personal care). If hormonal complaints persist, ask your doctor about testing.

AS SEEN IN

Best for: a healthy gut and glowing skin.
The place to go after you've tried everything else for acne.
Minerals your skin needs to protect cells from oxidative stress.
Among the best dietary supplements on the market today.
The first part in a three-part routine designed to help your complexion glow.

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