Arginine Shampoo: What It Really Does and What It Doesn't

Hair that looks thinner, an irritated scalp, no volume: men come into my barbershop with this every day. The cosmetics industry answers with ever new promises, from caffeine shampoos to growth serums. One ingredient surprisingly few people talk about is arginine.

Here I explain what arginine is, what it can and cannot do in a shampoo, and why I put it in our shampoo.

What is arginine and what does it have to do with your hair?

Arginine (also L-arginine) is an amino acid. Your body produces it itself, and it is a natural building block of proteins in skin and hair.

What arginine reliably does in shampoo: it cares for the scalp and roots, supports the scalp's moisture and, together with other ingredients, gives you hair that feels stronger.

Arginine vs. caffeine in shampoo: the comparison

Caffeine shampoos have become a mass-market product in recent years. Both ingredients have their fans. The most important point applies to both: a shampoo only works while it is on your scalp. That is why how you use it matters so much.

Does arginine help against hair loss?

This is the question I get asked most. My honest answer as a barber: a shampoo is a care product. It can care for the scalp and hair so that hair looks stronger and fuller. It cannot treat hair loss, not even with arginine.

Hair loss has many causes: genetics, stress, nutrient deficiency, hormones, medication. If you notice that you are losing much more hair than usual, see a dermatologist. It saves time and money.

What a good shampoo can still do:

• Scalp care: arginine cares for the scalp, coconut water and glycerin provide moisture.
• More volume: wheat protein attaches to the hair fibre, so hair looks fuller.
• Less dryness: argan oil cares for the hair fibre and adds shine, without silicones.

Arginine in practice Our shampoo with arginine, wheat protein & argan oil

Arginine as the key ingredient, plus wheat protein for volume, argan oil for shine and a hint of menthol for freshness.

View the arginine shampoo Vegan · free from silicones · made in Germany · also without added fragrance

What to look for when buying an arginine shampoo

Not every product that says arginine on the label contains much of it. A look at the INCI list helps. INCI is the ingredient list on every cosmetic product. The order shows the amount: the further up an ingredient is, the more of it is in there.

• Arginine not right at the end: if it comes after fragrance and preservatives, it is probably more marketing than anything else.
• Other caring ingredients: argan oil, wheat protein and coconut water complement arginine well.
• No silicones: they coat the hair like a film.
• The right scent: with a sensitive scalp, better choose the version without added fragrance.

The Captain's Essentials shampoo: arginine in practice

For over two decades in the barbershop I have cut and cared for the hair of thousands of men. Most of them were using products that didn't suit their scalp.

I spent three years working with a German laboratory on a shampoo built on ingredients that are easy to explain: arginine as the key ingredient, plus argan oil, wheat protein and a hint of menthol. Vegan, free from silicones, made in Germany. It comes in the scent Musk Abyad and without added fragrance for sensitive scalps.

Frequently asked questions about arginine shampoo