5-HTP Capsules

  • Lactose Free
  • Gluten Free Ingredients
  • Vegetarian
  • Vegan

... or make 4 interest-free payments of AU$7.50 when your order is over AU$100 Afterpay Find out more

Great prices when buying in Bulk

  • 120 capsules = AU$30
  • 480 capsules = AU$101 (AU$25.25 each)

5-Hydroxytryptophan (5-HTP) Capsules

5-Hydroxytryptophan (5-HTP) also known as oxitriptan is a naturally occurring amino acid and chemical precursor as well as a metabolic intermediate in the biosynthesis of the neurotransmitters serotonin and melatonin from tryptophan.

It is advised that 5-HTP should not be taken by people on SSRIs or other types of antidepressants. Please seek medical advice before consuming this product if you also take SSRIs.

Watch Dave Napper chat about 5-HTP


5 HTP can be taken any time of day, however many users consume it before sleeping.
A typical dosage of 5 HTP is 100mg.


100% Pharmaceutical Grade 5-Hydroxytryptophan Griffonia Simplicifolia Seed Extract (contains polydextrose as processing aid).

Capsules contain gelatin.

Bulk Nutrients is proudly Australian owned and operated with all products developed, blended and packed locally in our facility in Grove, Tasmania. Find out more




Keep well sealed, protect from moisture, light and heat.

  1. How does it taste? This product is unflavoured and is generally considered to be bitter.
  2. What is made from? This product is derived from Griffonia Seeds
  3. Are samples available of this product? Sorry we do not provide samples of this product
  4. How is it packaged? This product is packaged in single 120 Capsule containers. You can purchase 480 capsules for a futher discount, but the product will be delivered as 4 x 120 Capsule containers
5-HTP Capsules Nutrition Information
Servings per package: 120 Servings size: 1 capsule
  Average Quantity Per Serving Average Quantity Per 100g
Energy (kj) 2.5 417
Protein (g) 0 0
Fats (g) 0 0
  (saturated) (g) 0 0
Carbohydrates (g) 0 0
  (sugars) (g) 0 0
Fibre (g) 0.5 83.3
Polydextrose (g) 0.5 83.3
Sodium (mg) 0 0
5-Hydroxytryptophan (mg) 100 16700

Formulated Supplementary Sports Food. Not suitable for children under 15 years of age or pregnant women. Should only be used under medical or dietic supervision. This product is not a sole source of nutrition and should be consumed in conjunction with a nutritious diet and appropriate physical training or exercise program.


Write a Review

60 product reviews Hide Reviews Show Reviews

  • 5
    5 HTP

    Posted by biddy on Dec 10, 2018

    Really good for ongoing pain relief when anti inflammatories don't work or can't be taken

  • 5

    Posted by Blaire on Dec 06, 2018

    a good mood stabiliser. not sure it was too effective on improving sleep. I take one a day in the morning and notice I don’t have as many peaks and troughs in my mood and energy throughout the day.

  • 5

    Posted by Coral Bronkhorst on Oct 14, 2018

    this is great and will keep taking forever if it is safe to do so. I even told my daughter about it .

  • 5
    Great value and effective

    Posted by Sergio on Oct 08, 2018

    This is the 4th time I've bought a big batch of 5-htp from Bulk Nutrients. The supplement works as expected. I use 3-5 pills as a sleep aid, and to relieve depression and anxiety. Gives me really vivid almost lucid dreams too. I looked far and wide for better value and this was the best I could find in Australia.

  • 5
    Top class Delivery

    Posted by Gerard Kramer on Aug 10, 2018

    I received the product within 24 hours and it comes from Tasmania and I live in Northern NSW. Even the man from Australia Post said: that is unbelievable. Will write a review about the medication in a couple of weeks but this is top class.

  • 5
    Migraines and 5HTP

    Posted by Nesrin Akman on Aug 06, 2018

    I tested the effectiveness of 5HTP by going without it for three weeks twice. The first few days I didn't notice any difference, then migraines started to come back again with increasing frequency. 5HTP is not a cure once the migraine has started but its regular use reduces the severity and the frequency of the migraines with me.

  • 5
    Works well

    Posted by Anon on Jul 11, 2018

    Seems to work well, apparently also works well if teamed up with a Tyrosine supplement.

    Packaging and postage is secure fast and efficient.

    Does not seem to induce sleep if only one is taken, but can aide better sleep. Clearer dreams also seem to occur.

    Would not recommend taking more than one unless at night before bed, in case it does cause any drowsiness.

    No side effects experienced.

    When it was not taken, no 'withdrawal' side effects were experienced either.

    This seems to be a safer natural alternative to the various synthetic pharmaceutical anti-depressant drugs prescribed by doctors/psychiatrists, which do have reported dangerous side effects.

  • 5

    Posted by Therress on Jul 10, 2018

    A friend put us on to these, they are great, better than antidepressants!

  • 4
    Better mood and sleep

    Posted by Anon on Jun 17, 2018

    I take these while I'm at work for 3 weeks out on site. I notice my mood is much better and I can get through the trip easily.
    Have been pretty cranky when I get home tho, so I'll try taking them at home too to see if there is any improvement in my mood.
    Generally I do get a slightly better sleep while using these but not sure if they induce sleep.
    All in all, good product and I'll continue using it.

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