Truck Month Textbook Trade In Amazon Fashion Learn more Discover it $5 Albums Fire TV with 4k Ultra HD Mother's Day Gifts Shop now Amazon Gift Card Offer seeso seeso seeso  Amazon Echo  Echo Dot  Amazon Tap  Echo Dot  Amazon Tap  Amazon Echo Fire, Only $39.99 Kindle Paperwhite AutoRip in CDs & Vinyl ReadyRide Bikes from Diamondback

Size: 120|Change
Price:$19.40+ Free shipping with Amazon Prime
Your rating(Clear)Rate this item

There was a problem filtering reviews right now. Please try again later.

on July 16, 2011
I have had insomnia due to anxiety for almost a year now. This arrived in the mail 2 days ago. The first night, it didn't do as much for me, but still put me to sleep pretty well. I took it at bedtime. Yesterday, I took it a bit earlier, about 2 or 3 hours before bedtime, and boy, did it work! I got to sleep before midnight and stayed asleep until almost 7 a.m. this morning. Oh, it was wonderful. I haven't slept regular hours in ages. I hardly ever write reviews, but if you have trouble sleeping, this is a must-try. I will definitely be ordering more.
11 comment|102 people found this helpful. Was this review helpful to you?YesNoReport abuse
on December 29, 2011
I've taken this product twice daily for the past two years. Previously, I would suffer from occasional bouts of insomnia where I was simply unable to fall asleep, at all. This only happened a few times a year, but my sleep cycle was generally equally dysfunctional. I couldn't establish a routine, and I'd often stay up too late some nights, and wake up too early others. This product changed both of those things for me -- I now never have trouble sleeping through the night, and am easily able to get into a routine and go to bed/wake up at roughly the same time each day.

Since I've been on it for so long, I started to think that maybe it was just placebo or that maybe my changes in diet, etc since the original problem would have resolved it. I've twice waited more than a week before re-ordering, and while it's a gradual change, both times I've noticed marked degradation in my sleep. As I experience no negative side effects while using it, I have no intention of stopping. I don't hesitate to recommend it!
0Comment|62 people found this helpful. Was this review helpful to you?YesNoReport abuse
on September 18, 2006


Recently I ran out of 5-HTP and I purchased this 'Source Naturals' product with basically the results I attained from the same dosages from 'Now' or 'Nature's Way' or 'Swanson' brand products. This is a pretty good price and I will probably use this product again, especially if it is competitively priced. In the past I have purchased some products from Source Naturals, mostly amino acids, so I felt this would be a safe bet.


As 5-HTP goes, this is good stuff and reasonably priced. It does seem to cause vivid dreams and it seems to have the effects it is supposed to. However, it should be noted that although you need take only 1-2 capsules for insomnia, the short half life of 5-HTP from "GRIFFONIA SEEDS" necessitates rather frequent dosing for depression and appetite suppression, usually 4x per day and attention needs to be paid to the timing of doses with other amino acids. Serotonin syndrome may also be an issue for some.

Whereas many important issues are not certain or resolved regarding 5-HTP dosage and usage, it does seem to do a lot of good when used appropriately. Naturally a lot more can be said and books have been written on 5-HTP. It is a product that must be used with considerable care and professional medical monitoring is advisable due to the serious conditions it is used for and its effects on human brain chemistry. [Depression, Obesity, Insomnia] Nevertheless after taking it for 3 years I can say that I have experienced no negative side effects. Also, I have noticed reduced cravings for sweets, less anxiety in social situations and have slept better than I ever have. There has also been no sign of 5-HTP being habit forming in my experience.


If you are considering using this product for anxiety or sociophobic disorders [NOW] makes a 200mg dosage combined with the amino acid L-tyrosine. Many have found the addition of 250 mg of L-tyrosine to be most helpful and the product still retains all of its other characteristics.

33 comments|127 people found this helpful. Was this review helpful to you?YesNoReport abuse
on December 26, 2009
I've submitted this review for other bottles of 5-HTP, for two reasons:

1. I think aspects of my review are important and I hope to help as many people as possible; and
2. I actually took several different brands of 5-HTP, so my reviews reflect that. Mostly. :)

I have taken 5-HTP for insomnia and depression. Well, to combat those things. ;) At first it was quite helpful to me and I found that my moods stabilised reasonably well. However, I did find that after a while it had a propensity to making me feel a little bit manic or just . . . weird. I was sort of hyper-aware, for want of a better way to explain it. When I eased off I was able to resume taking it again after a couple of weeks and I found that a regimen of three weeks on and two weeks off seemed to work best without generating any of the milder side-effects.

My main caution came about through a very dangerous experience, which I have fortunately learnt from and not repeated. I was first taking this several years ago and I had the foolish notion of "if a little is good, a lot is better". Basically, I was taking everything under the sun for mood enhancement--St. John's Wort, 5-HTP, fish oil, you name it. If it even vaguely hinted at any pick-me-up capabilities I was downing those pills. And, typically, I was exceeding the recommended doses. I mean, hey, I'd taken supplements for most of my life and safely exceeded the recommended dosages, why should this be any different? Well, it was. In the end I tripped some invisible trigger and developed serotonin syndrome. The only reason I actually knew what was happening was because I had gone to university and studied psych and this is something I picked up in my extra-curricular research on neurochemistry. You won't hear of it from 99% of doctors, although it is a genuine disorder. They just don't know of it. It is also invariably fatal, unless you realise what it going on and stop the medication/supplementation in time. Thankfully, I was able to cease and recover, though I have had lingering effects ever since, even though the supplements are by now long gone from my system. Things have not gone quite back to normal.

Anyway, that is my caution. 5-HTP works, but it should not be combined with other medication or supplementation without some serious research first. Stay safe!
2323 comments|372 people found this helpful. Was this review helpful to you?YesNoReport abuse
on May 28, 2009
I have been dealing with thyroid issues for over a year. I think we have the correct dose of my med now only because of 5-HTP. I started out taking 2 at bedtime; I sleep better and and my sweet tooth cravings are gone. It has curbed my appetite and no mood swings. This really works. No sad faces anymore:D
0Comment|87 people found this helpful. Was this review helpful to you?YesNoReport abuse
on August 15, 2009

My experience, not medical advice. Read, research, and talk to your doctor.

Back story:

After a bout of depression, my doctor prescribed Welbutrin. Within 20 minutes of taking the first pill, I knew it was addictive. I used it, while entering counseling, and starting acupuncture to manage my chronic pain all with in a matter of weeks.

The Welbutrin gave me enough clarity to start to research and start to put together a natural plan. (Welbutrin also gave me tremedous headaches and dizzy spells.) I'm really into holistic, herbs, and natural stuff. It was during this period that I can across 5-htp.

What is does for me:

It balanced out my brain chemistry, much like the Welbutrin, but with out the yum factor that leads people into addiction or the nasty side effects. Within 20 minutes I felt "different." Yes, 20 minute, but that's me. Advice: When you're taking natural or prescribed medicines, monitor your feelings and any changes closely.

5-htp calmed and soothed me. You know the way you feel on vacation or when you're not under a great deal of pressure. It is weird and very hard to describe. I was able to withstand the regular rigors and stress of my job. (I teach job readiness skills to people on public assistance.)

The usual crap that would make react negatively and push the limits of my patience, were now minor irritations. Not only did I notice the change in my disposition, my co-workers did as well. I am now able to navigate the turbulent, stressful ocean that is my work life without reacting like a maniac! Another benefit, I sleep better and dream more.

After using 5-htp for a few months. I was pleased enough with the product to recommend it to my friends. Let me explain, my best friend was on prescribed anti-anxiety. I tossed him a bottle and told him what it did for me. Told him to read up on it on the net and give it a try if he wanted.

Well he didn't , for a month or so, when his prescription ran out he popped 1 or 2. He continued to use the 5-htp until the bottle ran out and then went back to the prescription meds.

Once back on the medication he spent the weekend in the bathroom. He asked me, then I had to explain, most likely it was his body's revolting against the meds after getting use to a natural product that relieved him of his anxiety.

My co-worker now orders 5-htp regularly, but keeps a bottle of prescribed medication on hand "just in case." My buddy has recently been promoted to a supervisor's position and his stress level has increased 3 fold. He has doubled his daily dose of 5-htp to accommodate.

The office secretary lately has been looking exceptional stressed lately. (Yeah, we work in a pit and she works a second job.) I aked if I could recommend something to her. That something was 5 HTP. I gave her the same advice: research, read, and talk to your doctor. I told her, I had an extra bottle at home. The next day I gave it to her. I recommended a 2 pill dosage. I asked her how she was felling when I ran into her after lunch. She said fine and was smiling (that was Monday). When I cheked in with her at the end of the week, she had to stop taking them because she was feeling too calm. LOL. She even ran around the the building recommending 5 htp to anybody who would listen. She actually gave away a bottle to one of our co-workers.

I did not order 5 htp from source naturals but from puritans pride ([...]Their 5 htp is derived from Griffonia simplicifolia, aw well, and also contains valarian root, which adds to the soothing effect. I highly recommend puritans pride because the usually have most products for buy 1 get 1 free (see my review of then on [....]). Right now 8/2009, they are running a buy 1 get 2 free plus shipping. Okay, that's [...]for 1 bottle containing 120 capsules of 5 htp at 100mg. If you order during the sale you get 3 bottles for [....]

Yes, I am promoting puritans pride because I love a deal just as much as the next guy. Why pay [...] for only 1 bottle?

On with the rest of my review...

How does it work?

5-HTP works by manipulating serotonin, a neurochemical critical to a wide variety of brain functions. Serotonin, in turn, is made in the body from 5-hydroxy-L-tryptophan, which is simply a modified amino acid obtained from plant sources.

Without adequate levels of serotonin, you'd probably suffer from depression, sleep disorders, addiction, and obesity.

Studies have shown that there's often a direct association between obesity (due to overeating) and decreased brain serotonin levels. Without adequate levels of serotonin, the brain perceives that the body is starving and turns on the hunger mode. Obese people who suffer from low levels feel chemically compelled to eat more and more. Once they ingest carbohydrates and various sugars in general, they experience a temporary increase in serotonin levels.

That's why some people are willing to eat an excess of junk food that's entirely lacking in protein. That's also why drugs like the now banned Redux (dexfenfluramine), which increased serotonin production, were successfully used as an appetite suppressant in the treatment of common obesity. Once serotonin levels retained to normal levels, the food-jones disapeared.

Other "addictive" substances raise serotonin levels, too. Examples include alcohol, tobacco, certain narcotics, and caffeine.


5-htp worked for me and my friends. It has been liberating emotionally, physically, and financially. Being able to endure more and not having to pay prescribe medicine prices for it.

I take 100mg in the morning with breakfast and 100mg at night before bed or with dinner. Please, find out what works for you.

As a comparison I use to use St. Johns Wort. It too had a calming effect, but the side effect was light sensitivity. However, St. Johns Wort doesn't have the long lasting effect or soothing feeling that 5-htp does.

Draw backs:

With herbs and natural medicine you have to find out the right dosage for you. Base dosages on height and weight and monitor the results.
0Comment|94 people found this helpful. Was this review helpful to you?YesNoReport abuse
TOP 1000 REVIEWERVINE VOICEon November 24, 2009
I was recently diagnosed with Hypothyroidism my doctor over medicated me and made me Hyperthyroid, that means I am running very fast and nervous all the time, I get plapitations all day long it is so uncomfortable. I tried everything. I tried this today and I suddenly realized this afternoon I had not had palpitaions all day and it is evening and I am feeling fine. I am relaxed and just now getting a little tired which is normal. It appears not to work for everyone, but it seems to be doing ok by me.
I too agree with many of you that Source Naturals is one of the finest companies out there I take their MSM..
0Comment|23 people found this helpful. Was this review helpful to you?YesNoReport abuse
on August 16, 2011
I had been placed on an expensive SSRI rx for depression. After researching some products for a natural source, I came across this product. My Dr helped me to wean off my rx and replace it with the 5-HTP. It works just as well and saves me a bundle. DO NOT STOP TAKING YOUR PRESCRIPTIONS WITHOUT SPEAKING WITH YOUR DOCTOR! But I highly recommend asking to switch to this medicine for depression/anxiety issues. I take 100mg in the morning and evening. I personally have not experienced any ill side effects, but I certainly would not start out with this high a dose if you've not been taking anything at all. Hope this helps someone!
0Comment|25 people found this helpful. Was this review helpful to you?YesNoReport abuse
on January 8, 2010
Amazing product with no side effects!
It has increase my positive mood.
Lessened my anxiety.
And kept me on track with healthy habits.

I have real bad depression and before I would only focus on that.
Now it seems I have more time on my hand and can do what I want.

I only need to take two pills a day. One in the morning and one at night.

A steady routine should be built. The effects aren't immediate. It takes affect in a week or two.

Great product at an affordable price. Really, GNC has it for $19 and it only comes with 30 capsules.
22 comments|46 people found this helpful. Was this review helpful to you?YesNoReport abuse
on November 12, 2010
For years I have been on Pharmaceutical anti-depressents and led to believe my depression is such that I could never be without "my medication".
I hated that I was tied to the meds.
I decided to read and educate myself regarding depression and the chemical makeup of the brain that causes depression.
I am now pharmaceutical free!
My dosage is 300 mg a day, I take 1oomg a day at 8/2/8, occasionally I will add another amino acid for anxiety.Gaba-calm
The great truth is you CAN be free of Phsychiatrists and the Pharmaceutical companies.
This is excellent potency.
I recommend you wean yourself. This is healthier and no side effects.
O, and I sleep much better.Also sometimes of extreme difficulty I'll add Sam-e 400mg, Nature Made
0Comment|32 people found this helpful. Was this review helpful to you?YesNoReport abuse

Questions? Get fast answers from reviewers

Please make sure that you've entered a valid question. You can edit your question or post anyway.
Please enter a question.
See all 3 answered questions

Send us feedback

How can we make Amazon Customer Reviews better for you?
Let us know here.