Overview
SCIENTIFIC SCORE
Likely Very Effective
Based on 1 Research
9
USERS' SCORE
Good
Based on 13 Reviews
8.2
Supplement Facts
Serving Size: 1 Veg Capsule
Amount Per Serving
%DV
5-HTP (5-hydroxytryptophan) (from Griffonia simplicifolia Extract) (Seed)
100 mg
*
Top Medical Research Studies
9
We delved into the effects of 5-hydroxytryptophan (5-HTP) on the thyroid's response to cold exposure. Our observations indicated that 5-HTP markedly inhibited the thyroid's reaction to cold, highlighting its potential impact. The study showed that other substances influenced this response in various ways, but 5-HTP stood out in its effectiveness. Despite the promising results, it’s important to note that alterations in the thyroid’s responses were closely linked to changes in brain chemistry, rather than direct hormonal influences.
Read More
Most Useful Reviews
10
Stress relief
This winter has been stressful, and with frequent colds, I started taking 5-HTP. My emotional state, sleep, and appetite improved remarkably. The illness vanished quickly.
Read More
10
Winter depression aid
Greatly aided my winter depression! The 5-hydroxytryptophan from Now Foods has saved me this season. It’s now a staple purchase during the cold months, as I only switch manufacturers. The quality is excellent, the ingredients are natural, and the benefits are undeniable!
Read More
9
Effective immune support
Hello! I trust this brand’s supplements. I bought this product as immune support during colds, and it performs excellently. The packaging is convenient, and the tight lid keeps the capsules in good condition.
Read More
Medical Researches
SCIENTIFIC SCORE
Likely Very Effective
Based on 1 Research
9
- All Researches
9
We delved into the effects of 5-hydroxytryptophan (5-HTP) on the thyroid's response to cold exposure. Our observations indicated that 5-HTP markedly inhibited the thyroid's reaction to cold, highlighting its potential impact. The study showed that other substances influenced this response in various ways, but 5-HTP stood out in its effectiveness. Despite the promising results, it’s important to note that alterations in the thyroid’s responses were closely linked to changes in brain chemistry, rather than direct hormonal influences.
Read More
User Reviews
USERS' SCORE
Good
Based on 13 Reviews
8.2
- All Reviews
- Positive Reviews
- Negative Reviews
10
Stress relief
This winter has been stressful, and with frequent colds, I started taking 5-HTP. My emotional state, sleep, and appetite improved remarkably. The illness vanished quickly.
Read More
10
Winter depression aid
Greatly aided my winter depression! The 5-hydroxytryptophan from Now Foods has saved me this season. It’s now a staple purchase during the cold months, as I only switch manufacturers. The quality is excellent, the ingredients are natural, and the benefits are undeniable!
Read More
9
Effective immune support
Hello! I trust this brand’s supplements. I bought this product as immune support during colds, and it performs excellently. The packaging is convenient, and the tight lid keeps the capsules in good condition.
Read More
9
Family remedy for colds
I give this product to my entire family during colds; it truly helps.
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9
Family use
I purchased this for my mother and everything's fine. I also give it to my children and take it myself during colds. I highly recommend it.
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Frequently Asked Questions
7.5
Felt positive effects
89 people found this helpful
Very good. I am 17 years old and have been taking these for two weeks alongside nutritional supplements like 5-HTP and L-Tyrosine. I have had no side effects. I believe the side effects like diarrhoea vary between people due to age and sensitivity. My experience has been beautiful; I felt the difference by the second week. I used to feel cold and frustrated, but now I'm positive and happy, which has helped my studies in my final year of high school. I recommend consulting a doctor before taking such supplements. Thank you, iHerb, for the speedy delivery.
7.5
Boosted immune system
I decided to try dietary supplements and noticed a significant improvement in my well-being and energy within weeks. Before this, I often felt weak and tired. They also boosted my immune system, helping me get sick less during the cold season. The vitamins have improved my skin, hair, and nails. I recommend them to all men who desire to care for their health.
10
Stress relief
This winter has been stressful, and with frequent colds, I started taking 5-HTP. My emotional state, sleep, and appetite improved remarkably. The illness vanished quickly.
7.5
Calm during challenges
I took two capsules for a month, then one at night with magnesium and B6 for my chronic depression. Initially, I was worried about insomnia returning. After two weeks, my sleep improved; I no longer woke often. After six weeks, my mood improved notably, even on rainy days. No longer do stressful situations knock me off balance, and I manage problems calmly. I intend to take a break and start again in autumn.
9
Effective immune support
Hello! I trust this brand’s supplements. I bought this product as immune support during colds, and it performs excellently. The packaging is convenient, and the tight lid keeps the capsules in good condition.
7.5
Calms during cold
4 people found this helpful
I love this supplement. I take 50mg myself and 100mg for my brother, who struggles with sleep and mood due to alcohol issues. I especially recommend it during cold periods, as 5-HTP gently calms you and helps with sleep, preventing depression. It’s best to use it under a doctor’s guidance and limit use to 1-1.5 months before taking a break.
9
We delved into the effects of 5-hydroxytryptophan (5-HTP) on the thyroid's response to cold exposure. Our observations indicated that 5-HTP markedly inhibited the thyroid's reaction to cold, highlighting its potential impact. The study showed that other substances influenced this response in various ways, but 5-HTP stood out in its effectiveness. Despite the promising results, it’s important to note that alterations in the thyroid’s responses were closely linked to changes in brain chemistry, rather than direct hormonal influences.
References
- Hashizume K. Effects of drugs that modify brain biogenic amine concentrations on thyroid activation induced by exposure to cold. Neuroendocrinology. 1976;20:47.
