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Top Rated Product
NSI 5-HTP -- 200 mg - 120 Capsules

NSI 5-HTP -- 200 mg - 120 Capsules

5-HTP increases serotonin levels in the brain which may positively enhance mood, sleep and weight management! How Does NSI® 5-HTP 200 mg work? -HTP, or 5-hydroxytryptophan, is a precursor to the neurotransmitter serotonin - which is essential for controlling mood, sleep and pain levels. The body produces 5-HTP from tryptophan, an amino acid found in small amounts in high-protein foods such as chicken, fish, beef and dairy products. It can also be taken in supplemental form, in which case it's extracted from the seeds of the Griffonia simplicifolia plant. 5-HTP is believed to help increase serotonin production in the brain, which may positively influence mood. 5-HTP may also help with other health issues related to serotonin deficiency, including nervousness, body tension and stiffness and head cavity discomfort. Certain elements of sleep are also believed to be affected by 5-HTP. Supplementing may not only assist with falling asleep faster, but also with increasing the duration of dream states (REM sleep) and of deep slumber. 5-HTP may also promote weight management by helping to reduce cravings for sweets and starches, which may help contribute to healthier overall eating habits. For best results and quickest absorption, take 5-HTP on an empty stomach. Do not take 5-HTP for more than three consecutive months without consulting a healthcare practitioner. NSI® 5-HTP 200 mg is better because it:. Is a higher-dose of 5-HTP, ideal for maintaining mood, sleep, and weight management after smaller-dose tolerance has been established. Is available at a better value than other 5-HTP products on the market.  . Did You Know? All NSI supplements are packaged in HDPE (High Density Polyethylene) bottles. These bottles keep moisture vapor out, protecting the freshness and integrity of their contents, and are 400% more effective compared other brands currently using PET (Polyethylene Terephthalate) bottles. HDPE bottles do not break as glass can and are also recyclable so we urge you to please recycle them.

Average Customer Rating: 4.656 out of 5 4.7 out of 5
29 of 32 (91%) customers would recommend this product to a friend.

Customer Reviews for NSI 5-HTP -- 200 mg - 120 Capsules

Overall Rating: 1 out of 5 1 out of 5
July 1, 2009
By Coconut123 from Sunnyvale, CA
Value: 1 out of 5 1 out of 5
Quality: 1 out of 5 1 out of 5
Effectiveness: 1 out of 5 1 out of 5
Satisfaction: 1 out of 5 1 out of 5

"It doesn't seem to work for me. I will keep trying though. Won't give up so soon."

Age: 55-64
Gender: Female
Daily supplement usage: 6+ supplements daily
Referral source: Self-referred
Reason for usage: Specific health concern
Duration of use: Less than 30 days
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Review 2 for NSI 5-HTP -- 200 mg - 120 Capsules

Overall Rating: 5 out of 5 5 out of 5
Great Product, I Couldn't Recommend It Enough, June 16, 2009
By AlexandrAnne from New England
Value: 5 out of 5 5 out of 5
Quality: 5 out of 5 5 out of 5
Effectiveness: 5 out of 5 5 out of 5
Satisfaction: 5 out of 5 5 out of 5

"-This takes a week to kick in for me, and only a day to wear off if I forget to take it.
- Don't take it in the morning like I did! This is a great sleep aide, and absolutely helped with my insomnia. When I first started using this product, I used no other supplement besides for a multi-vitamin, so I attribute my sleeping through the night on this product alone.
- It makes me feel like its not the end of the world when I get upset. It has helped me stay in control of emotions during stressful situations, which is a huge problem for me otherwise. It also generally makes me happier - just a better outlook on life.
- I 100% recommend this product to anyone with these problems - this has become a staple in my life."


Age: 18-24
Gender: Female
Daily supplement usage: 3-5 supplements daily
Referral source: Self-referred
Reason for usage: Specific health concern
Duration of use: Over 180 days
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Review 3 for NSI 5-HTP -- 200 mg - 120 Capsules

Overall Rating: 5 out of 5 5 out of 5
Excellent Buy, May 6, 2009
By jeaninemarie from East Coast
Value: 5 out of 5 5 out of 5
Quality: 5 out of 5 5 out of 5
Effectiveness: 5 out of 5 5 out of 5
Satisfaction: 5 out of 5 5 out of 5

"This does what it says it does. I sleep rather well, aches in my back & neck seem to have disappeared, and my mood has improved."

Age: 35-44
Gender: Female
Daily supplement usage: 1-2 supplements daily
Referral source: Other
Reason for usage: Specific health concern
Duration of use: Over 180 days
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Review 4 for NSI 5-HTP -- 200 mg - 120 Capsules

Overall Rating: 5 out of 5 5 out of 5
This works!, April 14, 2009
By ML47
Value: 5 out of 5 5 out of 5
Quality: 5 out of 5 5 out of 5
Effectiveness: 5 out of 5 5 out of 5
Satisfaction: 5 out of 5 5 out of 5

"You will sleep much better and your outlook will be improved. A win-win situation.. I had to have minor surgery and was having a rough time coping with this. I felt that it was vital that I improve my outlook. 5HTP put me on a even keel. I sleep better and my posititve outlook has resurfaced. Incredible. Thanks NSI."

Age: 55-64
Gender: Female
Daily supplement usage: 3-5 supplements daily
Referral source: Other
Reason for usage: Specific health concern
Duration of use: Less than 30 days
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Review 5 for NSI 5-HTP -- 200 mg - 120 Capsules

Overall Rating: 2 out of 5 2 out of 5
Just Didn't Work for Me, March 11, 2009
By PrimeChuck from Houston, TX
Value: 3 out of 5 3 out of 5
Quality: 3 out of 5 3 out of 5
Effectiveness: 1 out of 5 1 out of 5
Satisfaction: 2 out of 5 2 out of 5

"I have used the 5-HTP for several weeks on and off. It does promote sleep somewhat, but I still do not sleep through the night. I get about the same effect with 2 tylenol capsules."

Age: 55-64
Gender: Male
Daily supplement usage: 3-5 supplements daily
Referral source: Self-referred
Reason for usage: Specific health concern
Duration of use: Less than 30 days
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Review 6 for NSI 5-HTP -- 200 mg - 120 Capsules

Overall Rating: 5 out of 5 5 out of 5
Pleasantly surprised, March 9, 2009
By Surfdog from Santa Cruz
Value: 5 out of 5 5 out of 5
Quality: 5 out of 5 5 out of 5
Effectiveness: 5 out of 5 5 out of 5
Satisfaction: 5 out of 5 5 out of 5

"I have tried a number of sleep assisting natural remedies in the past. Most of them are either very expensive, don't really work or leave you feeling sluggish the next day. With 5-HPT I was still able to get back to sleep during the night whenever I awoke but had no "hangover" the following morning. So all in all I rate this product very high."

Age: 55-64
Gender: Male
Daily supplement usage: 6+ supplements daily
Referral source: Other
Reason for usage: Promote overall health
Duration of use: Less than 30 days
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Review 7 for NSI 5-HTP -- 200 mg - 120 Capsules

Overall Rating: 5 out of 5 5 out of 5
Helps with Migraines and Mood, February 14, 2009
By JulestheRunner from Texas
Value: 5 out of 5 5 out of 5
Quality: 5 out of 5 5 out of 5
Effectiveness: 5 out of 5 5 out of 5
Satisfaction: 5 out of 5 5 out of 5

"I have been taking this on the recommendation of my neurologists for my migraine headaches. It really helps. It doesn't get rid of them it has cut down the amount I have. I have tried EVERYTHING and this has been the best so far. It is an amino acid, a precurser to serotonin uptake, important neurotramsmitter for your brain. It also help with your mood and PMS symptoms."

Age: 45-54
Gender: Female
Daily supplement usage: 6+ supplements daily
Referral source: Physician
Reason for usage: Specific health concern
Duration of use: 30-60 days
1 of 1 people found this review helpful.
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Review 8 for NSI 5-HTP -- 200 mg - 120 Capsules

Overall Rating: 5 out of 5 5 out of 5
Best Price Anywhere, January 8, 2009
By Sojourner from Olean,NY
Value: 5 out of 5 5 out of 5
Quality: 5 out of 5 5 out of 5
Effectiveness: 5 out of 5 5 out of 5
Satisfaction: 5 out of 5 5 out of 5

"I enthusiastically recommend this product as the best deal, best price. I've used other brands and it can get quite pricey. This brand works great and saves money."

Age: 35-44
Gender: Female
Daily supplement usage: 6+ supplements daily
Referral source: Self-referred
Reason for usage: Specific health concern
Duration of use: Over 180 days
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Review 9 for NSI 5-HTP -- 200 mg - 120 Capsules

Overall Rating: 5 out of 5 5 out of 5
It works for me., December 31, 2008
By Buster25
Value: 5 out of 5 5 out of 5
Quality: 5 out of 5 5 out of 5
Effectiveness: 5 out of 5 5 out of 5
Satisfaction: 5 out of 5 5 out of 5

"Helps to brighten your outlook and make you feel better."

Age: 25-34
Gender: Male
Daily supplement usage: 1-2 supplements daily
Referral source: Self-referred
Reason for usage: Promote overall health
Duration of use: Less than 30 days
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Review 10 for NSI 5-HTP -- 200 mg - 120 Capsules

Overall Rating: 5 out of 5 5 out of 5
SLeep Aid, December 14, 2008
By Bartnbabs from Naples, FL

"5-HTP is a wonderful product. Have used for years to help with sleep. No side effects. It is natural, decreases in our body with age and NSI has the best prices anywhere. Highly recommend it1"

Age: 45-54
Gender: Female
Daily supplement usage: 6+ supplements daily
Referral source: Physician
Reason for usage: Specific health concern
Duration of use: Over 180 days
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Review 11 for NSI 5-HTP -- 200 mg - 120 Capsules

Overall Rating: 5 out of 5 5 out of 5
I'm sleeping so much better!, November 30, 2008
By JewelryLadyLori from Tampa Bay, FL
Value: 5 out of 5 5 out of 5
Quality: 5 out of 5 5 out of 5
Effectiveness: 5 out of 5 5 out of 5
Satisfaction: 5 out of 5 5 out of 5

"This product was suggested to me by a nurse who is working with me through perimenopause issues...including insomnia. Since I began using this product one month ago, my sleep has improved A LOT! I suggested this product to my sister who has suffered with insomnia for years, and she is seeing a marked improvement as well!!"

Age: 35-44
Gender: Female
Daily supplement usage: 6+ supplements daily
Referral source: Physician
Reason for usage: Specific health concern
Duration of use: 30-60 days
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Review 12 for NSI 5-HTP -- 200 mg - 120 Capsules

Top 50 Contributor Top 50 Contributor
Overall Rating: 3 out of 5 3 out of 5
October 31, 2008
By beesknees from michigan
Value: 3 out of 5 3 out of 5
Quality: 3 out of 5 3 out of 5
Effectiveness: 3 out of 5 3 out of 5
Satisfaction: 3 out of 5 3 out of 5

"This did improve my mood, but had to stop taking as it interfered with my thyroid medicine. L-Tyrosine works just as well for mood."

Age: 45-54
Gender: Female
Daily supplement usage: 1-2 supplements daily
Referral source: Self-referred
Reason for usage: Promote overall health
Duration of use: Over 180 days
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Review 13 for NSI 5-HTP -- 200 mg - 120 Capsules

Overall Rating: 5 out of 5 5 out of 5
Great Quality, October 30, 2008
By SipRedWine from Los Angeles
Value: 5 out of 5 5 out of 5
Quality: 5 out of 5 5 out of 5
Effectiveness: 5 out of 5 5 out of 5
Satisfaction: 5 out of 5 5 out of 5

"This is a great product and EXCELLENT price! 5HTP keeps me mellow and happy! LOVE IT!!!!!"

Age: 45-54
Gender: Female
Daily supplement usage: 3-5 supplements daily
Referral source: Self-referred
Reason for usage: Promote overall health
Duration of use: Over 180 days
1 of 1 people found this review helpful.
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Review 14 for NSI 5-HTP -- 200 mg - 120 Capsules

Overall Rating: 5 out of 5 5 out of 5
A good night's sleep, September 5, 2008
By al92lt1 from Fernley, NV
Value: 5 out of 5 5 out of 5
Quality: 5 out of 5 5 out of 5
Effectiveness: 5 out of 5 5 out of 5
Satisfaction: 5 out of 5 5 out of 5

"The best over the counter sleep aid that I've tried."

Age: 65-74
Gender: Male
Daily supplement usage: 3-5 supplements daily
Referral source: Self-referred
Reason for usage: Specific health concern
Duration of use: 30-60 days
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Review 15 for NSI 5-HTP -- 200 mg - 120 Capsules

Overall Rating: 5 out of 5 5 out of 5
Great Product, July 28, 2008
By Juicey from Birmingham,Alabama
Value: 5 out of 5 5 out of 5
Quality: 5 out of 5 5 out of 5
Effectiveness: 5 out of 5 5 out of 5
Satisfaction: 5 out of 5 5 out of 5

"I found the product to be great. It helps me to control my appetite.And I don't crave carbohydrates like I once did."

Age: 35-44
Gender: Female
Daily supplement usage: 6+ supplements daily
Referral source: Self-referred
Reason for usage: Promote overall health
Duration of use: Over 180 days
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Review 16 for NSI 5-HTP -- 200 mg - 120 Capsules

Top 100 Contributor Top 100 Contributor
Overall Rating: 5 out of 5 5 out of 5
Great product, June 2, 2008
By Melissia from Concord, NC
Value: 5 out of 5 5 out of 5
Quality: 5 out of 5 5 out of 5
Effectiveness: 5 out of 5 5 out of 5
Satisfaction: 5 out of 5 5 out of 5

"I brought this product initially because I read that it helps with weight and appetite control. I discovered that it helps me sleep better at night. I think it is great just for that reason. I continue to take it for that reason."

Age: 35-44
Gender: Female
Daily supplement usage: 1-2 supplements daily
Referral source: Self-referred
Reason for usage: Promote overall health
Duration of use: 30-60 days
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Review 17 for NSI 5-HTP -- 200 mg - 120 Capsules

Top 250 Contributor Top 250 Contributor
Overall Rating: 5 out of 5 5 out of 5
Relax, April 18, 2008
By cthewigs
Value: 5 out of 5 5 out of 5
Quality: 5 out of 5 5 out of 5
Effectiveness: 5 out of 5 5 out of 5
Satisfaction: 5 out of 5 5 out of 5

"This product settles me down and helps me to relax. I have a much easier time falling asleep since taking this product."

Age: 35-44
Gender: Female
Daily supplement usage: 6+ supplements daily
Reason for usage: Specific health concern
Duration of use: 30-60 days
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Review 18 for NSI 5-HTP -- 200 mg - 120 Capsules

Overall Rating: 5 out of 5 5 out of 5
EXCELLENT!, January 15, 2008
By davisclan
Value: 5 out of 5 5 out of 5
Quality: 5 out of 5 5 out of 5
Effectiveness: 5 out of 5 5 out of 5
Satisfaction: 5 out of 5 5 out of 5

"My serotonin levels are low and the 5HTP really helped. It also supresses your appetite. I would recommend taking it at night before going to bed."

Age: 35-44
Gender: Female
Daily supplement usage: 1-2 supplements daily
Referral source: Self-referred
Reason for usage: Promote overall health
Duration of use: 30-60 days
2 of 2 people found this review helpful.
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Review 19 for NSI 5-HTP -- 200 mg - 120 Capsules

Overall Rating: 4 out of 5 4 out of 5
to increase your sleep, December 23, 2007
By a1bluerose from Salt Lake City, Utah
Value: 4 out of 5 4 out of 5
Quality: 4 out of 5 4 out of 5
Effectiveness: 4 out of 5 4 out of 5
Satisfaction: 4 out of 5 4 out of 5

"I started taking NSI 5-htp to help with sleep, I have Fibromyalgia and have trouble falling and staying asleep, HTP was recommended by a friend and it does seem to help. NSI's product is not as expensive as that from the health food store and works just as well. Thanks NSI for another great product."

Age: 65-74
Gender: Female
Daily supplement usage: 3-5 supplements daily
Referral source: Friend
Reason for usage: Specific health concern
Duration of use: Over 180 days
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Review 20 for NSI 5-HTP -- 200 mg - 120 Capsules

Top 1000 Contributor Top 1000 Contributor
Overall Rating: 5 out of 5 5 out of 5
I use it for; Better sleep & Stress, November 15, 2007
By y2rock from Lakewood, NJ
Value: 5 out of 5 5 out of 5
Quality: 5 out of 5 5 out of 5
Effectiveness: 5 out of 5 5 out of 5
Satisfaction: 5 out of 5 5 out of 5

"5-HTP is a great product it really works, since taking it I am sleeping deeper & longer then before waking up feeling rested.

Take 300-400mg a day (200mg hour before bed time), and try to go to bed the same time every night. It also reduces your stress...

Things I take with it: Calcium, Magnesium, vitamin D (all in one), B complex, Synergy (multi vitamin version 2), Advance C, acetyl L Carnitine, and NSI Organic Cold-Milled Flaxseed

I use NSI products because they are in Veg Caps and easy to swallow, AND great prices"


Age: 25-34
Gender: Male
Daily supplement usage: 6+ supplements daily
Referral source: Self-referred
Reason for usage: Specific health concern
Duration of use: 30-60 days
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