L-Tryptophan Capsules 500 mg – Essential Amino Acid, Vegan

Q: What is L-tryptophan?

L-Tryptophan is an essential amino acid – which means the body cannot produce it itself and must obtain it through food. It is one of the eight essential amino acids that the human organism needs on a regular basis. Amino acids are the building blocks of proteins – without them, many bodily processes would not function.

Q: Why is L-tryptophan particularly rare in the diet?

L-Tryptophan is the essential amino acid least represented in food. Compared to other amino acids, it occurs in significantly smaller amounts. This makes a conscious supply through the diet or targeted supplementation a topic that deserves more attention than most other amino acids.

Q: Which foods contain L-tryptophan?

L-Tryptophan is found in small amounts in many foods: wholegrain bread, brown rice, lentils, wholegrain pasta, dark chocolate, dried figs, cheese and cocoa. Compared to other amino acids, however, the amounts are significantly lower – which is why tryptophan is one of the rarest of the essential amino acids in food.

Q: Who is L-tryptophan interesting for?

L-Tryptophan is particularly interesting for vegans and vegetarians, since many tryptophan-rich foods are of animal origin. People with a one-sided diet or increased needs also often choose tryptophan. If you are pregnant, breastfeeding or taking medication, please consult your doctor before supplementing.

up to −18%

L-Tryptophan Kapseln Dose – 500mg essentielle Aminosäure

About the product

It's 11 p.m. again, your body is tired – but your mind just won't switch off? This is where an amino acid comes in that hardly anyone knows, even though it's involved in two of the body's most important messengers: L-tryptophan is the natural precursor of serotonin – and thus also of melatonin, your sleep hormone.

What makes our L-Tryptophan Capsules special:

One capsule delivers 500 mg of pure L-tryptophan – the essential amino acid your body can't produce on its own. Two ingredients in total, vegan, no frills. One capsule in the evening, done.

Your benefits at a glance:

✔ 500 mg of L-tryptophan per capsule – high-strength
✔ The natural precursor of serotonin and melatonin
✔ Essential amino acid – your body needs it from external sources
✔ Just 1 capsule a day – ideal in the evening
✔ Just 2 ingredients – no fillers
✔ 100% vegan & free from artificial additives
✔ Made in Germany, independently lab-tested
✔ 180-day money-back guarantee – zero risk for you

Your evening ritual

Phone away, lights down, 1 capsule – small rituals make the difference between overthinking and winding down. Want to take it a step further? Our Inner Calm Trio combines L-tryptophan with magnesium and ashwagandha.

Usage & ingredients

Content per daily dose (1 capsule)
Ingredient	1 capsule
L-Tryptophan	500 mg

Directions for Use
Take 1 capsule daily with plenty of liquid with a meal.

Ingredients
L-Tryptophan, hydroxypropyl methylcellulose

Properties
Vegetarian	yes
Lactose-free	yes
Sugar-free	yes
Vegan	yes
Gluten-free	yes
GMO-free	yes

Allergens
Milk	no
Eggs	no
Cereals containing gluten	no
Sulphur	no
Fish	no
Crustaceans	no
Molluscs	no
Lupins	no
Soybeans	no
Mustard	no
Celery	no
Sesame	no
Peanuts	no
Tree nuts	no

L-Tryptophan Capsules

Your body is tired, but your mind won't switch off? L-tryptophan is the natural precursor of serotonin and melatonin.

The serotonin precursor
Precisely dosed
4-month supply

In stock – delivered in 1–2 working days

180-day money-back guarantee

Pay after 30 days with PayPal or Klarna

Try it first, pay later: with Klarna invoice or PayPal Pay Later you settle your order 30 days after delivery, at no extra cost. You choose the option at checkout.

Thousands of happy customers
Purely natural ingredients
180-day money-back guarantee

About the product

What makes our L-Tryptophan Capsules special:

One capsule delivers 500 mg of pure L-tryptophan – the essential amino acid your body can't produce on its own. Two ingredients in total, vegan, no frills. One capsule in the evening, done.

Your benefits at a glance:

✔ 500 mg of L-tryptophan per capsule – high-strength
✔ The natural precursor of serotonin and melatonin
✔ Essential amino acid – your body needs it from external sources
✔ Just 1 capsule a day – ideal in the evening
✔ Just 2 ingredients – no fillers
✔ 100% vegan & free from artificial additives
✔ Made in Germany, independently lab-tested
✔ 180-day money-back guarantee – zero risk for you

Your evening ritual

Usage & ingredients

Content per daily dose (1 capsule)
Ingredient	1 capsule
L-Tryptophan	500 mg

Directions for Use
Take 1 capsule daily with plenty of liquid with a meal.

Ingredients
L-Tryptophan, hydroxypropyl methylcellulose

Properties
Vegetarian	yes
Lactose-free	yes
Sugar-free	yes
Vegan	yes
Gluten-free	yes
GMO-free	yes

Allergens
Milk	no
Eggs	no
Cereals containing gluten	no
Sulphur	no
Fish	no
Crustaceans	no
Molluscs	no
Lupins	no
Soybeans	no
Mustard	no
Celery	no
Sesame	no
Peanuts	no
Tree nuts	no

As seen on

Made in
Germany
Made in
Germany

The amino acid for a good mood & sleep. 500 mg of pure L-tryptophan per capsule – an essential amino acid your body cannot produce itself and must obtain from food.

L-tryptophan is the precursor of serotonin and melatonin – two messengers that influence your mood, relaxation and sleep-wake cycle. A natural companion for inner balance.

More calm during the day, more restful sleep at night.

The serotonin precursor
Precisely dosed
4-month supply

Capsules or powder?

Where the difference really shows in everyday life.

Surpresa Natural capsules	Nutrient powder
Taste-neutral	Grassy, bitter taste
Just swallow – done	Needs flavourings & sweeteners*
Precisely pre-dosed	Measure it yourself
No mixing, no measuring	Clumps quickly
Ideal on the go	Dust & residue
Capsule shell protects the ingredients	Absorbs moisture – clumps over time
Long shelf life, even after opening	Needs airtight storage

* Powders often need flavourings and sweeteners to mask their own taste. Our capsules do without.

Rated thousands of times

4.5

Tested by people like you – not just by us.

We have been making our capsules in Glinde near Hamburg since 2011. Thousands of customers have tried them and rated them honestly – on Amazon and here in our shop.

Amazon 4.4 over 3,300 reviews
Our shop 4.9 over 1,200 reviews

180-day money-back guarantee Not satisfied? You get your money back. Terms

As of 27 Sep 2026 · reviews of all Surpresa products, average rounded.

FAQ

Clear answers to everything that matters.

Transparent, well-founded and honest – so you know exactly what you’re getting.

Still have a question?

Write to us at info@surpresanatural.de – we reply personally and quickly.

What is L-tryptophan?

L-Tryptophan is an essential amino acid – which means the body cannot produce it itself and must obtain it through food. It is one of the eight essential amino acids that the human organism needs on a regular basis. Amino acids are the building blocks of proteins – without them, many bodily processes would not function.

Why is L-tryptophan particularly rare in the diet?

L-Tryptophan is the essential amino acid least represented in food. Compared to other amino acids, it occurs in significantly smaller amounts. This makes a conscious supply through the diet or targeted supplementation a topic that deserves more attention than most other amino acids.

Which foods contain L-tryptophan?

L-Tryptophan is found in small amounts in many foods: wholegrain bread, brown rice, lentils, wholegrain pasta, dark chocolate, dried figs, cheese and cocoa. Compared to other amino acids, however, the amounts are significantly lower – which is why tryptophan is one of the rarest of the essential amino acids in food.

Who is L-tryptophan interesting for?

L-Tryptophan is particularly interesting for vegans and vegetarians, since many tryptophan-rich foods are of animal origin. People with a one-sided diet or increased needs also often choose tryptophan. If you are pregnant, breastfeeding or taking medication, please consult your doctor before supplementing.