No Thanks

Your 10% Off Promo Code is on the Way! Thanks for signing up for emails.

You're now signed up to receive exclusive deals and savings opportunities!

Thanks again for connecting with us. Keep an eye on your inbox — your first coupon is on its way!

Thank You! This email address is already signed up

You are signed up for the following:

  • Offers
  • Recipes
  • E-Newsletter
  • Updates & Reminders

Thank you for your interest and be assured that you will continue to receive our emails at this address.

Look for your next communication from us within the next week.


We are having trouble processing your request.

Our apologies!

Please try again later.

Search Please enter an item number or keyword
Shop by
Do You
Need Help?

Swanson Ultra

5-HTP Extra Strength

Customer Favorite

5-HTP Extra Strength

Item: SWU518

  • Terrific for mood and sleep support*

  • Neurotransmitter that supports your overall well-being

  • A unique compound extracted from griffonia beans

100 mg 60 Caps
Caps Size: 3

MSRP $12.49
Save 28%
Yes! I want 10% off and free shipping over $50 on my next automatic shipment of this item.  days. Learn more
In Stock

Supplement Facts

Serving Size 1 Capsule

  Amount Per Serving % Daily Value
L-5 HTP (L-5 hydroxytryptophan)(Griffonia simplicifolia seed extract) 100 mg *

*Daily Value not established.

Other ingredients: Rice flour, gelatin, may contain one or both of the following: magnesium stearate, silica.

Suggested Use: As a dietary supplement, take one capsule per day with water on an empty stomach.

WARNING: Do not take this product if you are taking a prescription antidepressant or if you are pregnant or nursing. Consult your healthcare provider before use if you have a medical condition or if you are taking any prescription medications.

Relative Size

Printable Size Guide

Shipping Weight

.07 lbs

  • Terrific for mood and sleep support*

  • Neurotransmitter that supports your overall well-being

  • A unique compound extracted from griffonia beans

Get high-powered support for your mental and emotional well-being with Swanson Ultra Extra- Strength 5-HTP. A unique compound extracted from griffonia beans, 5-HTP works within the body to promote healthy levels of serotonin, a hormone vital to healthy moods and sleep patterns.*

Swanson Ultra 5-HTP Extra Strength Reviews

Summary of Customer Ratings & Reviews

Customer Ratings & Reviews

5-HTP Extra Strength is rated 4.6 out of 5 by 169.
Rated 5 out of 5 by from Great sleep aid I have been taking regular 5HTP for years. It is great that this product is time-released. I haven't started using it yet, but expect even better results.
Date published: 2017-09-27
Rated 4 out of 5 by from A little confused... I had been using the NOW brand 100 mg. Both brands, according to label are the same. The Swanson brand capsule is about 1/3 the size of the NOW brand. No fillers listed on either. Not sure why such a difference in size. One capsule of the Swanson brand seems to do nothing compared to one capsule of the NOW brand (which is also sold by Swanson). Today I took 2 ,Swanson 5HTP equaling 200 mg. I was in the best mood ever! And lots of energy to go with it. I hope I can get a repeat tomorrow.
Date published: 2017-05-24
Rated 5 out of 5 by from Excellent This is a great product for me, will continue to buy.
Date published: 2016-10-02
Rated 3 out of 5 by from Good product, just not for me I was very hopeful that this would work for me. I have never taken anything like this so did not know what to expect. I took it this morning at 8 and about 10-15 minutes later was throwing up. That continued until about 11:30 am. I'm not really sure why that happened, but I will not be taking it again. It seems like most people don't have that problem so it is likely just me. I am taking rhodiola rose root right now and it does a decent job.
Date published: 2016-09-03
Rated 5 out of 5 by from Good product I have been using this for a couple of months for mood balance and am satisfied with what I consider positive results. The price is very affordable.
Date published: 2016-08-14
Rated 5 out of 5 by from Surprisingly Effective! This was the first time I had purchased 5-htp, and I was surprised at how much better I felt after I started using it. And this is still the best value I have seen for the dose and qty.
Date published: 2016-05-26
Rated 5 out of 5 by from have been using it on and off for years. Great product, very effective, you may feel the full effect within few short hours, one pill a day in the right time is all I need (for a normal day).
Date published: 2016-02-20
Rated 1 out of 5 by from No effect I took this for 2 weeks, in the hope to relieve sleepless nights, but it did not do anything, zero, zilch. Maybe it needs to be taken for a longer time or maybe it just does not work for everybody.
Date published: 2015-11-04
Rated 3 out of 5 by from Don't seem to do anything. I don't know. They don't seem to do anything.
Date published: 2015-09-10
Rated 5 out of 5 by from I'm so HAPPY I found this product Since I can't say what I'm using this for, I'll just say I'm so HAPPY i found 5-htp, and I'd be so very sad if I hadnt. Swanson has good quality and prices. I've been taking it for years and it's very effective.
Date published: 2015-07-05
Rated 5 out of 5 by from works as described This product works well for me.
Date published: 2015-05-04
Rated 5 out of 5 by from Work hours I work very demanding shifts, and this helps keep me awake. I only take it when and how much I need it.
Date published: 2015-03-10
Rated 5 out of 5 by from Wonderful Very helpful in evening out the mood. Has good calming effects. I recommend it to a lot of people.
Date published: 2015-02-09
Rated 4 out of 5 by from Amplifies the effect of SJW For me, it amplified the effects of St Johns Wort. It is not a miracle pill, but I think maximizes the potential of other supplements like SJW.
Date published: 2015-02-01
Rated 5 out of 5 by from My favorite supplement A great supplement and the one I wouldn't do without! Too bad I cant share the reasons I take this supplement because its better than anything else! I recommend you research this supplement for yourself and see the great things about it! I buy from Swanson because I trust their quality and you cant beat their prices! Best of health to you!
Date published: 2014-11-24
Rated 5 out of 5 by from Works really really really well Yeah 5-HTP makes me feel almost uphoric. Love this stuff. I use it in combination with Lithium Orotate. Works well.
Date published: 2014-09-16
Rated 5 out of 5 by from 5 htp This product has been amazing in regards to my mood being stabilized and my sleep. The price is excellent, and unlike medications, if I miss a night I don't suffer. Definitely recommend this product!
Date published: 2014-08-26
Rated 5 out of 5 by from Good For Focus I bought Swanson's Extra-Strength 5-HTP for stress relief. It is effective for that but I found that taking a lower dose(50mg) worked well for me and I felt more mentally focused taking it. Too high a dose made me too relaxed, sleepy.
Date published: 2014-08-03
Rated 5 out of 5 by from Stress Buster The salutary effects of 5-HTP are almost immediate, especially when needed during particularly stressful conditions such as meeting crushing deadlines at work. And the Swanson caps go down very easily without any stomach upset.
Date published: 2014-08-01
Rated 5 out of 5 by from Great Product I added this supplement to my regime during a very stressful time in our lives. It helps us get the restorative sleep I need to get through each day. I recommend this supplement. I take it along with glycine.
Date published: 2014-05-22
Rated 5 out of 5 by from good product I have only been taking for a month and seems to be working
Date published: 2014-05-04
Rated 5 out of 5 by from Great Stuff! Works so well to moderate moods. Used by 55 , 68 and 86 year olds in our house for tranquility and uplifting emotions. Great stuff.
Date published: 2014-03-28
Rated 5 out of 5 by from Good for sleep I like this. It mellows me out and prepares me for a good nights sleep. It is understood to be a precurser to seratonin which helps to prolong the deep stages of sleep. I lasts for about six hours, so the last two-three hours of sleep can have an REM rebound affect which seem to produce calm dreams in the early morning.
Date published: 2014-02-15
Rated 5 out of 5 by from Best SLEEP While pregnant I had a really hard time sleeping. Either not soundly or long enough. Once I started taking this product at night before bed I could sleep so good!! And the price is outstanding!!!
Date published: 2013-12-30
Rated 5 out of 5 by from All Good My Doctor told me to start taking this product and I have used this ever since. I am grateful for having yet another Swanson brand product I can count on!
Date published: 2013-12-19
  • y_2017, m_12, d_13, h_20
  • bvseo_bulk, prod_bvrr, vn_bulk_2.0.3
  • cp_1, bvpage1
  • co_hasreviews, tv_29, tr_140
  • loc_en_US, sid_SWU518, prod, sort_[SortEntry(order=SUBMISSION_TIME, direction=DESCENDING), SortEntry(order=FEATURED, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_swansonhealth
Swanson Quality Assurance

Why Shop Swanson®?

We know how important your health is to you and your loved ones. That’s why we’re focused on delivering only high quality products you can trust at the best value.

Our lab evaluates every product to make sure it’s compliant with strict standards and government regulations, and we fully believe in and stand behind our products. If you’re dissatisfied for any reason, we’ll give you a full refund and pay return shipping.

Swanson's Standards

We are dedicated to offering the highest quality products at the best price. Find out more about how we ensure such a high standard in everything we do.

Learn More
Customer Service
About Swanson

Easy Refill

  • Get your favorite products delivered automatically
  • 10% off future orders of Swanson brand products in your subscription
  • FREE standard shipping on all future orders over $50
  • Control the frequency, delivery date, item quantity... or cancel at any time
  • Email reminders before each delivery
See all FAQs here