Top 10 Best L Tryptophan
of November 2024
1
Best Choice
S RAW SCIENCE
S RAW SCIENCE
Melatonin 10mg Sleep Supplement - L Theanine, GABA Calm, L-Tryptophan - Deep Sleep Supplements for Adults with Ashwagandha, Passion Flower, Lemon Balm, Chamomile, Magnesium Sleep Support - 60 Capsules
10
Exceptional
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2
Best Value
Clean Nutraceuticals
Clean Nutraceuticals
Clean Nutraceuticals GABA 750mg 5 HTP 200mg L Tryptophan 500mg L Theanine 200mg Ashwagandha 3000mg SAM-e L-Glycine - Mood Support Vitamins for Women and Men with L-Tyrosine - Count
9.9
Exceptional
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3
Double Wood Supplements
Double Wood Supplements
L-Tyrosine 1,000mg per Serving, 120 Veggie Capsules (L Tyrosine Supplement for Memory, Attention, and Focus) Amino Acid, Vegan Safe, Non-GMO by Double Wood
9.8
Exceptional
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4
Double Wood Supplements
Double Wood Supplements
Magnesium L Threonate Capsules (Magtein) High Absorption Supplement Bioavailable Form for Sleep and Cognitive Function Support 2,000 mg 100 Capsules
9.7
Exceptional
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5
Micro Ingredients
Micro Ingredients
Micro Ingredients L-Tryptophan Supplement, 1500mg Per Serving, 240 Caplets (500mg Per Caplet) | Essential Amino Acid | Supports Mood and Relaxation | Non-GMO, Easy to Swallow
9.6
Exceptional
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6
NUTRAHARMONY
NUTRAHARMONY
5HTP 400 mg Capsules - 5-HTP Supplement Tryptophan - Ashwagandha | L-Theanine | St. John's Wort | Vitamins B6 & D3 | 5 HTP - Sleep, Mood & Brain Support - NON-Habit Forming & Drug-Free - 60 Capsules
9.5
Excellent
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7
LongLifeNutri
LongLifeNutri
L-Tryptophan 500mg 180 Capsules | Positive Vitamin Supplement | Extra Strength Complex 1000mg Serving | Pure Natural Source
9.4
Excellent
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8
Nutricost
Nutricost
Nutricost L-Tryptophan 500mg, 120 Capsules - with BioPerine, Gluten Free, Non-GMO
9.3
Excellent
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9
NOW
NOW
NOW Supplements, L-Tryptophan 500 mg, Encourages Positive Mood*, Supports Relaxation*, 60 Veg Capsules
9.2
Excellent
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10
Horbäach
Horbäach
L Tryptophan 1500mg Capsules | 240 Count | Nighttime Formula | Non-GMO, Gluten Free Supplement | by Horbaach
9.1
Excellent
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11
NOW
NOW
NOW Supplements, L-Tryptophan 1,000 mg, Double Strength, Encourages Positive Mood*, Supports Relaxation*, 60 Tablets
9.0
Excellent
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12
Source Naturals
Source Naturals
Source Naturals L-Tryptophan, for Mood, Relaxation, and Sleep*, 500mg - 120 Capsules
8.9
Very Good
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13
Pure Encapsulations
Pure Encapsulations
Pure Encapsulations L-Tryptophan | Amino Acid Supplement for Relaxation, Serotonin Support, PMS, and Sleep* | 90 Capsules
8.8
Very Good
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14
Superior Labs
Superior Labs
Superior Labs Pure L-Tryptophan 500mg, 120 Vegetable Capsules Non-GMO Dietary Supplement for Restful Sleep & Relaxation Supports Feelings of Well Being and Healthy Circulation Circulation
8.7
Very Good
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15
Jarrow Formulas
Jarrow Formulas
Jarrow Formulas, L-Tryptophan Veggie Capsules, 500 mg, 60 Count
8.6
Very Good
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16
Life Extension
Life Extension
Life Extension L-Tryptophan 500 mg L-Tryptophan Supplement for Healthy Sleep and Stress Response Support Gluten-Free, Non-GMO, Vegetarian 90 Capsules
8.5
Good
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17
Doctor's Best
Doctor's Best
Doctor's Best L-Tryptophan , Helps Sleep, Healthy Mood & Behavior, Non-GMO, Vegan, Gluten & Soy Free, Veggie Caps, Promotes Normal, Healthy Restful Sleep, 90 Count
8.4
Good
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About L Tryptophan
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Melatonin 10mg Sleep Supplement - L Theanine, GABA Calm, L-Tryptophan - Deep Sleep Supplements for Adults with Ashwagandha, Passion Flower, Lemon Balm, Chamomile, Magnesium Sleep Support - 60 Capsules
UNLOCK THE POWER OF NATURAL SLEEP - Fall into deep, restorative slumber effortlessly with our Melatonin 10mg Tablets. Packed with Ashwagandha and chamomile extract. This herbal sleep supplement promotes calm sleep, ensuring you fall asleep faster and wake up refreshed. Say goodbye to restless nights and hello to rejuvenating sleep with Melatonin Magnesium L-Theanine complex.. UNRIVALED SLEEP SUPPORT - Discover the benefits of our vegan Melatonin tablets, meticulously designed for adults seeking natural Melatonin and GABA sleep comlex. Each Melatonin pill serves Melatonin 5mg, ushering in restorative sleep like Melatonin gummies 10mg, but in a pill format. Therefore, its easy adjust the dosage, ranging from 5 mg to melatonin 20mg.. DEEP SLEEP SUPPLEMENTS FOR ADULTS - Discover the magnesium citrate and melatonin supplements proven to promote sound sleep. Enhanced with magnesium for sleep and calmness, this supplement, complete with GABA Calm and Ashwagandha, doubles as a magnesium sleep supplement. Get the dual benefit of a restful night and experience tranquility like never before with our calm magnesium citrate formula. RELAXATION WITH SLEEP COMPLEX - Unleash the power of our superior sleep formula, a remarkable fusion of Melatonin L Theanine and L-tryptophan supplement. These tablets aren't just GABA supplements but also have L Theanine benefits. Designed for optimal relaxation and calmness with the complex of natural sleep enhancers. ELEVATE YOUR WELLBEING - Immerse in the potent blend of our melatonin ashwagandha complex, uniquely fused with the calming essence of lemon balm extract and chamomile in capsules. More than just sleep pills, our formula incorporates the ashwagandha root extract. Embrace the synergy of ashwagandha root capsules, chamomile extract, and other premium ingredients, perfect for nourishing your body while paving the path to restful slumber.. SYNERGY FOR DEEP SLEEP- Our product harnesses the power of melatonin gaba l-theanine 5htp, demonstrating that high doses aren't necessary when ingredients work synergistically. Unlike products requiring high doses like extra strength melatonin gummies or 3mg melatonin gummies, our complex shows efficacy through quality combination, not quantity.. EFFICACY WITHOUT OVERDOSE- Our Sleep capsules illustrate that achieving desired effects doesn't require high-dosage supplements like melatonin chewables or l theanine 400mg. We prove that an optimal result can be reached with a carefully selected combination of ingredients, avoiding the risk of overdose with l-tryptophan 500mg.. ONE CAPSULE - MANY SOLUTIONS- Instead of relying on multiple sleep capsules such as sleep gummies or gomitas para dormir in Spanish and ashwagandha gummies, our product offers a comprehensive solution. We highlight that a holistic approach in one capsule surpasses the need for consuming several different products.. COMPREHENSIVE SLEEP SOLUTION- Our capsules with 10 mg of melatonin surpass the need for various doses like those found in melatonin 5mg gummies and 1mg melatonin gummies. Enhanced with 10 mg melatonin l theanine 5htp GABA magnesium supplements, it offers full sleep help in one capsule.. SYNERGISTIC STRENGTH, NOT JUST DOSE- Highlighting the efficacy of our product against standard melatonin gummy options, we affirm that our encapsulated sleep support formula, enriched with synergistic components, renders the notion of melatonin 1 mg alone as suboptimal. This synergy ensures that our comprehensive blend offers profound sleep benefits beyond mere dosage..
Clean Nutraceuticals GABA 750mg 5 HTP 200mg L Tryptophan 500mg L Theanine 200mg Ashwagandha 3000mg SAM-e L-Glycine - Mood Support Vitamins for Women and Men with L-Tyrosine - Count
Advanced GABA Supplements For Women and Men - Our product takes a GABA L-Theanine Supplement and Ashwagandha Supplements and combines them in powder form with L-Tryptophan 500mg and a 5-HTP 200mg and the results are amazing. Normal L Theanine Supplement contain smaller dosages like l theanine 100mg and l theanine 150 mg. However, Clean Nutra has officially created an even more potent all in one supplement.. The All In One 5 HTP Supplement You've Been Looking For - Clean Nutra CalmAgain provides multiple full-dose products in one Mood Support Balance Support complex containing a full L-Theanine 200mg and GABA Supplement in a convenient 2 capsule dosage. Finally a bigger supplement than GABA 100mg, L-Theanine 100 mg, and 5 HTP 100 mg have been packed into one convenient solution.. Introducing the CalmAgain All In One Supplement - In addition to containing large milligram dosages of L-Theanine 200mg and many 5 HTP Supplements, our formula also contains a whopping 750mg of GABA Powder. This is a powerful alternative to GABA 500mg, L Theanine 100 mg, Ashwagandha 1000mg, and less potent Ashwagandha Capsules. Not your average L-Theanine Supplements, Ashwagandha Pills, and 5-HTP Powder.. A Powerful 5-HTP Supplement with Theanine 200mg Capsules - CalmAgain is overflowing with potent htp 5 powder, tryptophan 500mg capsules, l-theanine 200mg, SAMe, L-Glycine, Vitamin D3, Vitamin B6, Magnesium Glycinate, and L Tyrosine. Clear out the countless l theanine drops, 5 htp gummies, tryptophan drops, and aswagandha gummies that are lesser and choose just one inclusive supplement from Clean Nutraceuticals.. Vetted and Trusted Ingredients - We pride ourselves in offering a quality supplement that combines the benefits of L- Theanine, ashwagandha extra strength, 5 htp high potency, L Glycine, and Black Pepper Extract. Our formulas are proudly made in a registered and certified facility. Many products offer only a few ingredients like l-theanine 200mg, l theanine 500mg, and l-theanine 400mg. Enjoy an all-in-one Clean Nutra supplement..
L-Tyrosine 1,000mg per Serving, 120 Veggie Capsules (L Tyrosine Supplement for Memory, Attention, and Focus) Amino Acid, Vegan Safe, Non-GMO by Double Wood
L Tyrosine Amino Acid for Memory, Attention, Focus, and Energy - One study conducted on 140 participants showed L-Tyrosine may help support working memory while another study on 57 participants showed improvements in attention focus. L-Tyrosine for Neurotransmitter Production - L-Tyrosine may help support the production of the neurotransmitters dopamine and norepinephrine. Two Month Supply - Each double of L-Tyrosine contains 120 capsules of 500mg L Tyrosine Powder each. This provides 60 total servings of 1,000mg L-Tyrosine. Vegan Safe, Manufactured in the USA from Globally Sourced Ingredients, Gluten Free, Non-GMO - Double Wood's L-Tyrosine is vegan safe, Manufactured in the USA from Globally Sourced Ingredients, Gluten Free, and Non-GMO. Made in a GMP Complaint Facility - Double Wood's L Tyrosine is Manufactured in the USA from Globally Sourced Ingredients, in a GMP compliant facility.
Magnesium L Threonate Capsules (Magtein) High Absorption Supplement Bioavailable Form for Sleep and Cognitive Function Support 2,000 mg 100 Capsules
Only Form of Magnesium able to Support Magnesium Levels in the Brain Magtein Magnesium L-Threonate is a magnesium breakthrough supplement and the only form of magnesium clinically proven to support magnesium levels in the brain. Clinically Studied for Cognitive Health Multiple clinical studies show Magnesium L Threonate can help support cognitive health. Highly bioavailable form of Magnesium L Threonate is a mineral chelating agent that is able to greatly enhance the bioavailability of magnesium making it highly absorbable.. Magnesium for Sleep Magnesium Threonate is commonly taken alongside L-Theanine and Apigenin in a sleep cocktail for nighttime assistance treonato de magnesio. Manufactured in the USA from Globally Sourced Ingredients and tested two times for safety and purity Doublewood High Absorption Mag L Threonate Capsules are Manufactured in the USA from Globally Sourced Ingredients Purity testing is available upon request.
Micro Ingredients L-Tryptophan Supplement, 1500mg Per Serving, 240 Caplets (500mg Per Caplet) | Essential Amino Acid | Supports Mood and Relaxation | Non-GMO, Easy to Swallow
Micro Ingredients offers potent L-Tryptophan caplets that are easy to swallow and deliver 1,500mg L-Tryptophan per serving.. Each pouch contains 240 total caplets and takes 3 caplets per serving, delivering 1,500mg L-Tryptophan total or 500mg per caplet. Lasts up to a 80 day supply.. Taking daily provides essential amino acid support for mood and relaxation in both men and women.. L-Tryptophan is an amino acid that has been trusted for over 100 years. It is an essential building block for protein and other beneficial physiological properties.. Premium non-GMO L-Tryptophan supplements. Made without soy, dairy, gluten, preservatives, and artificial flavors. Ingredients must pass a 3rd party lab test to ensure a product that is safe, pure, and potent..
5HTP 400 mg Capsules - 5-HTP Supplement Tryptophan - Ashwagandha | L-Theanine | St. John's Wort | Vitamins B6 & D3 | 5 HTP - Sleep, Mood & Brain Support - NON-Habit Forming & Drug-Free - 60 Capsules
5HTP 400mg Capsules Experience the power of 5-HTP with our premium 400mg capsules. Elevate your mood, support restful sleep, and feel your overall well-being with potent tryptophan supplement. 5-HTP is perfect for those seeking a natural way to support a balanced lifestyle.. 6-in-1 Brain, Mood, Sleep Complex Discover the ultimate 6-in-1 solution for brain health, mood support, and restful sleep. Our effective blend is powered with Ashwagandha, L-Theanine, Vitamins B6 D3, and 5-HTP. This comprehensive formula supports energy, positive outlook, cognitive function, and relaxation for a better you.. Nervous System Support Support the nervous system with our advanced 5-htp supplement to balance your good mood ensure restful sleep. Feel your best day and night with an effective 5-HTP blend that supports a healthy nervous system, overall well-being cognitive function. Embrace a good state of mind and optimal brain functioning with every capsule.. Made in USA With Globally Sourced Ingredients 5HTP 400mg capsules are proudly manufactured in the USA under strict quality control standards, laboratory-controlled quality GMP certified. We adhere to rigorous procedures to ensure every batch's safety, purity, and efficacy. We use the most potent forms of each component to achieve the maximum effect of tryptophan supplement. Trustworthy Service We are committed to providing exceptional customer service and transparency with NUTRAHARMONYs carefully selected 5-htp supplements With 5-htp, you can trust that you're receiving a premium-quality supplement backed by scientific research and dedicated customer support.
L-Tryptophan 500mg 180 Capsules | Positive Vitamin Supplement | Extra Strength Complex 1000mg Serving | Pure Natural Source
PURE L-TRYPTOPHAN SOURCE Obtain 500mg of pure L-Tryptophan per serving, promoting serotonin production for enhanced mood and sleep quality.. MOOD BOOST L-Tryptophan supports serotonin levels, which may help elevate your mood and promote feelings of happiness and contentment.. OPTIMAL SLEEP AID Encourage healthy sleep patterns with L-Tryptophan, which helps regulate your body's sleep-wake cycle and melatonin production.. MADE IN THE USA Rest assured knowing our L-Tryptophan supplement is manufactured in the USA under strict quality control standards.. 180 CAPSULES FOR EXTENDED USE With a 6-month supply, our L-Tryptophan supplement offers long-lasting support for your mood and sleep needs..
Nutricost L-Tryptophan 500mg, 120 Capsules - with BioPerine, Gluten Free, Non-GMO
120 Capsules of High Quality L-Tryptophan Per Bottle. 500mg of L-Tryptophan 5mg of BioPerine For Improve Absorption Per Capsule. 120 Servings Per Bottle. Premium Grade, Non-GMO, Gluten Free. Made in a GMP Compliant, FDA Registered Facility.
NOW Supplements, L-Tryptophan 500 mg, Encourages Positive Mood*, Supports Relaxation*, 60 Veg Capsules
SUPPORTS RELAXATIONPREMIUM GRADE An essential amino acid that is not synthesized by the body and must be obtained by diet or supplementation.. Product Note Exposure to heat or sunlight may lead to meltingdamage of product. Hence customers are expected to be available during the product delivery. ENCOURAGES POSITIVE MOODPROMOTES RESTFUL SLEEP Critical for the production of serotonin and melatonin, which help to support a positive mood, healthy sleep patterns, and proper immune system function. Every lot tested to be free of Peak E and microbial contamination.. CERTIFICATIONSCLASSIFICATIONS Soy Free, Nut Free, VeganVegetarian, Non-GMO, Egg Free, Dairy Free, Made without Gluten. GMP Quality Assured NPA A-rated GMP certification means that every aspect of the NOW manufacturing process has been examined, including our laboratorytesting methods for stability, potency, and product formulation.. Packaged in the USA by a family owned and operated company since 1968. During the summer months products may arrive warm but Amazon stores and ships products in accordance with manufacturers' recommendations, when provided..
L Tryptophan 1500mg Capsules | 240 Count | Nighttime Formula | Non-GMO, Gluten Free Supplement | by Horbaach
L-TRYPTOPHAN Essential amino acid that helps synthesize Melatonin and serotonin hormones. MEGA SUPPORT Daily capsules deliver 1,500 mg of L-Tryptophan in each serving. EXPERTLY CRAFTED Our professional formula is backed by our commitment to purity and potency. HORBAACH MANUFACTURERS Laboratory Tested, Trusted Ingredients, Superior Quality, 100 Guaranteed. NATURALLY FREE OF Gluten, Wheat, Yeast, Milk, Soy, Artificial Flavor, Preservatives Non-GMO.
NOW Supplements, L-Tryptophan 1,000 mg, Double Strength, Encourages Positive Mood*, Supports Relaxation*, 60 Tablets
ENCOURAGES POSITIVE MOOD Critical for the production of serotonin and melatonin, which help to support a positive mood, healthy sleep patterns, and proper immune system function.. Product Note Exposure to heat or sunlight may lead to meltingdamage of product. Hence customers are expected to be available during the product delivery. PROMOTES RESTFUL SLEEP Every lot of is tested to be free of peak E and microbial contamination.. CLASSIFICATIONSCERTIFICATIONS Kosher, Vegan, Non-GMO. GMP Quality Assured NPA A-rated GMP certification means that every aspect of the NOW manufacturing process has been examined, including our laboratorytesting methods for stability, potency, and product formulation.. Packaged in the USA by a family owned and operated company since 1968 Store in a cool, dry place after opening.. During the summer months products may arrive warm but Amazon stores and ships products in accordance with manufacturers' recommendations, when provided..
Source Naturals L-Tryptophan, for Mood, Relaxation, and Sleep*, 500mg - 120 Capsules
The essential amino acid L-tryptophan is the precursor of two natural compounds of great importance.. Suggested Use 1 capsule three times daily, between meals and preferably with fruit juice. To support restful sleep, take an additional 3 capsules before bed.. Allergies Suitable for vegetarians and contains no yeast, dairy, egg, gluten, soy or wheat. Contains no preservatives, or artificial color, flavor or fragrance.. Over 40 Years of Trust. Source Naturals was created in 1982 by CEO Ira Goldberg to support each individual's potential to enjoy optimal health.. Manufactured in the USA. Manufactured in Scotts Valley, CA, under the Good Manufacturing Practices cGMPs established by the US Food and Drug Administration FDA..
Pure Encapsulations L-Tryptophan | Amino Acid Supplement for Relaxation, Serotonin Support, PMS, and Sleep* | 90 Capsules
Restful Sleep Supports sleep quality, onset and duration.. Relaxation Support Additional research suggests that tryptophan may promote relaxation and help control occasional cravings.. Pure Quality Our supplements are made with only premium ingredients sourced from trusted suppliers and guided by our nutritional experts, then carefully manufactured and tested to verify their potency and purity.. Pure Difference What makes us different isn't just our process or what goes into our supplements -- what we leave out matters, too. Pure Encapsulations products are FREE FROM wheat, eggs, tree nuts peanuts, gluten, artificial colors, flavors sweeteners, coatings and shellacs, GMOs, and unnecessary binders, fillers preservatives..
Superior Labs Pure L-Tryptophan 500mg, 120 Vegetable Capsules Non-GMO Dietary Supplement for Restful Sleep & Relaxation Supports Feelings of Well Being and Healthy Circulation Circulation
MAINTAIN SEROTONIN LEVELS L-Tryptophan is an amino acid that converts to serotonin in the body. This supports multiple brain functions and helps to maintain balance to produce normal sleep.. PROMOTES RELAXATION Our non-GMO L-Tryptophan dietary supplements promote relaxation to support health sleep... ABSOLUTE PURITY - ZERO SYNTHETIC ADDITIVES, FILLERS, HEAVY METALS, ADULTERANTS - You will never see unnecessary additives such as stearates, dioxides, glycerides or fillers other brands use to make manufacturing cheaper, faster and easier. In addition, we put all ingredients and products through rigorous testing to make sure they are 100 free of contaminants.. UNQUESTIONABLE QUALITY - ALL PRODUCTS PRODUCED IN 3rd PARTY CERTIFIED NSF CERTIFIED FACILITIES. Few are and can pass the stringent standards of NSF. Our products are produced in facilities that have been 3rd party audited and certified for quality by NSF, one of the most stringent quality manufacturing assurance organizations in the industry.. NO RISK AND NO HASSLE - For almost a decade, we have been delighting Amazon customers. If you are not satisfied with the benefits, results, or are unsatisfied with the product in any other way, please contact us and we'll gladly refund your money in 48 hours or less. That's it - no questions, no hassle, no risk. .
Jarrow Formulas, L-Tryptophan Veggie Capsules, 500 mg, 60 Count
Essential Amino Acid L-tryptophan is an essential amino acid and hence cannot be synthesized by the body, but must be obtained from food or supplements It acts as a precursor to serotonin and melatonin. Stress, Sleep and Mood Support L-tryptophan can be converted to serotonin and melatonin in the body, so it plays an important role in supporting relaxation, restful sleep and positive mood. Reduce Cravings L-tryptophan is fermented from vegetable source materials and may help in reducing carbohydrate cravings. Veggie Capsules Take one veggie capsule on an empty stomach 30 minutes before sleep with water or fruit juice or as directed by your qualified healthcare professional This formula is suitable for vegans and vegetarians. Superior Nutrition and Formulation The goal of Jarrow Formulas is to promote optimal health with high-quality, effective, affordable, and superior formulation of dietary supplements Our customers can be assured of purity, value, and potency.
Life Extension L-Tryptophan 500 mg L-Tryptophan Supplement for Healthy Sleep and Stress Response Support Gluten-Free, Non-GMO, Vegetarian 90 Capsules
SUPPORT YOUR SEROTONIN LEVELS Youve probably heard of serotonin. Its a neurotransmitter that is deeply involved in both restful sleep and positive mood. But what you might not know is that your body needs adequate levels of the essential amino acid tryptophan to make it.. GET SOME SHUTEYE Modern lifestyles seem to revolve around not getting enough restbut thats not healthy. To keep your body healthy, you have to let it rest. L-Tryptophan encourages serotonin production, which in turn promotes restful, restorative sleep patterns.. MOOD AND MUNCHIES What else is tryptophan good for Well, it promotes a healthy mood thats the serotonin again and it also promotes satiety the sensation of being full. Tryptophan also encourages your bodys healthy response to stress.. INGREDIENTS MATTER - Sourced using only the finest raw ingredients with the purity and potency your body deserves. This product is certified non-GMO and gluten-free. Manufactured in the USA and a Certificate of Analysis is available for every product we produce.. LIVE YOUR HEALTHIEST LIFE - For over 40 years, weve been developing advanced, effective formulas made with the highest standards and based on the latest scientific findings. We believe the answers to a healthier, richer life are within reach and that rigorous scientific research is the path to get us there. Or formulations are created using the exact ingredients and dosages used in the studies that inspired them, ensuring that maximum bioavailability and efficacy is achieved..
Doctor's Best L-Tryptophan , Helps Sleep, Healthy Mood & Behavior, Non-GMO, Vegan, Gluten & Soy Free, Veggie Caps, Promotes Normal, Healthy Restful Sleep, 90 Count
DOCTORS BEST L-TRYPTOPHAN WITH TRYPTOPURE contains L-Tryptophan - an essential amino acid protein building block that is not synthesized by the body and must be obtained in the diet or supplementation. It is also essential in the production of niacin, which is then metabolized into serotonin and melatonin in the brain. These neurotransmitters exert a calming effect for a better cognitive focus, encourages a positive mood, and a normal restful sleep.. MAINTAIN SEROTONIN LEVELS L-Tryptophan is an amino acid that is a precursor of serotonin in the body. Serotonin is required for early brain development, emotional maturation, memory and other cognitive functions, coping with fear and stress, healthy sleep patterns and healthy mood. Serotonin also is the main source of melatonin, the bodys major sleep hormone.. PROMOTES NORMAL RESTFUL SLEEP L-Tryptophan supplements helps encourage a positive mood and a normal restful sleep. Serotonin also is the main source of melatonin, the bodys major sleep hormone.. BALANCE YOUR MOOD serotonin in the brain helps amino acids, helps exert a calming effect and encourages better cognitive focus, a positive mood.. During the summer months products may arrive warm but Amazon stores and ships products in accordance with manufacturers' recommendations, when provided..