5-HTP, 100 mg, 60 Veg Capsules

Neurotransmitter SupportSupports Positive MoodNon-GMOA Dietary SupplementVegetarian/VeganKosherAmino AcidsFamily Owned since 1968GMP Quality Assured5-HTP, the intermediate metabolite between the amino acid L-tryptophan and serotonin, is extracted from the seed of an African plant (Griffonia simplicifolia).

5-HTP, 50 mg, 90 Veg Capsules

Neurotransmitter SupportSupports a Positive MoodNon-GMOA Dietary SupplementVegetarian/VeganKosherAmino AcidsFamily Owned Since 1968GMP Quality Assured5-HTP, the intermediate metabolite between the amino acid tryptophan and serotonin, is extracted from the seed of an African plant (Griffonia simplicifolia).

Mood Positive 5-HTP, 50 Tablets

Mood & amp; StressPromotes A More Positive MoodHelps Reduce Occasional Stress & amp; Anxiety100% Drug-FreeVegetarianDietary SupplementNatrol® Mood Positive® 5-HTP:5-HTP Participates in the body's synthesis of Serotonin to promote a more positive moodL-Theanine Promotes the brain's alpha waves to support a deep state of relaxation without drowsinessVitamin B-12 and Folic Acid Combat the effects of daily stress100% Drug-free and non-habit forming

5-HTP, 50 mg, 30 Veg Capsules

Neurotransmitter SupportSupports a Positive MoodNon-GMOA Dietary SupplementVegetarian/VeganKosherAmino AcidsFamily Owned Since 1968GMP Quality Assured5-HTP, the intermediate metabolite between the amino acid tryptophan and serotonin, is extracted from the seed of an African plant (Griffonia simplicifolia).

5-HTP, Double Strength, 200 mg, 60 Veg Capsules

Neurotransmitter SupportSupports a Positive MoodWith Glycine, Taurine & amp; InositolNon-GMOA Dietary SupplementVegetarian / VeganKosherAmino AcidsFamily Owned Since 1968GMP Quality Assured5-HTP, the intermediate metabolite between the amino acid L-tryptophan and serotonin, is extracted from the bean of an African plant (Griffonia simplicifolia).NOW® Double Strength 5-HTP has twice the 5-HTP (200 mg per capsule) as in our regular strength product (100 mg per capsule).

5-HTP, Double Strength, 200 mg, 120 Veg Capsules

Neurotransmitter Support Supports Positive Mood With Glycine, Taurine & amp; Inositol Non-GMO A Dietary Supplement Vegetarian/Vegan Kosher Amino Acids Family Owned Since 1968 GMP Quality Assured5-HTP, the intermediate metabolite between the amino acid L-tryptophan and serotonin, is extracted from the seed of an African plant (Griffonia simplicifolia).Now Double Strength 5-HTP has twice the 5-HTP (200 mg per capsule) as in our regular strength product (100 mg per capsule).

5-HTP, 100 mg, 180 Veggie Caps

Science-Based Nutrition™Helps Promote Healthy SleepDietary SupplementNon-GMO / Gluten Free / Soy Free / Vegan™Doctor's Best 5-HTP (5-hydroxy L-tryptophan contains a naturally occurring metabolite of the amino acid tryptophan. 5-HTP is extracted from the seeds of the Griffonia simplicifolia plant. 5-HTP is converted in the brain to serotonin, a neuro-transmitter substance found at the junction (synapses) between neurons. It produces a calming and relaxing effect providing support to help maintain mental, emotional well-being, and to promote healthy sleep.Doctor's Best 5-HTP is tested to ensure that is does not contains "Peak X".Helps promote healthy sleepHelps promote calm and relaxationHelps support mental and emotional well-being

5-HTP, 100 mg, 60 Capsules

Dietary SupplementEgg FreeGluten FreeFree of NutsDairy Free5-HTP plays a role in both sleep regulation and mood balance. 5-HTP is a precursor for serotonin, which can then be converted to melatonin (the hormone that helps us fall and stay asleep). However, 5-HTP bypasses the light-triggering system that regulates the release of melatonin, increasing both serotonin and melatonin release, regardless of light or time of day.Serotonin has a calming effect on brain chemistry, and may help to ease anxiety. Serotonin also plays an important role in many other bodily functions, including digestion, appetite, and pain perception. Our 5-HTP is naturally derived from the seeds of the African plant Griffonia simplicifolia and is combined with activated vitamin B-6 as active P-5-P, an important cofactor in serotonin metabolism.

Serene Science, 5-HTP, 100 mg, 120 Capsules

Balanced MoodDietary Supplement5-HTP (L-5-Hydroxytryptophan) is an intermediate in the natural conversion of the essential amino acid, tryptophan to serotonin, a brain chemical associated with positive mood and well-being. Preclinical studies show that 5-HTP may help support healthy levels of serotonin in the body. In addition to a balanced mood, serotonin may also support & nbsp;melatonin production and a healthy sleep cycle. Serene Science® 5-HTP is derived from the seeds of the African plant Griffonia simplicifolia.

5-HTP, Time Release, Extra Strength, 100 mg, 45 Tablets

Mood & amp; StressPromotes A Calm & amp; Relaxed Mood100% Drug-FreeVegetarianDietary SupplementNatrol® 5-HTP 100 mg Time Release:Promotes a calm, relaxed mood and helps maintain a positive outlook.Helps reduce occasional anxiety.Enables production of Serotonin.Controlled Release Tablet - promotes a calm and relaxed mood throughout the day.100% Drug-free and non-habit forming.

5-HTP, 100 mg, 120 Veg Capsules

Neurotransmitter SupportSupports a Positive MoodNon-GMOA Dietary SupplementVegetarian/VeganKosherAmino AcidsFamily Owned Since 1968GMP Quality Assured5-HTP, the intermediate metabolite between the amino acid L-tryptophan and serotonin, is extracted from the seed of an African plant (Griffonia simplicifolia).

5-Hydroxytryptophan, 90 Capsules

Dietary Supplement Mood Sleep Gluten FreeEnhances sleep and helps manage stress.5-HTP increases serotonin levels to promote restful sleep, manage stress, and decrease sugar cravings. It contains pyridoxal 5'-phosphate, the active form of vitamin B6 and the necessary cofactor for the conversion of 5-HTP to serotonin.The serotonin levels in the body are associated with the regulation of sleep, mood, and appetite. A balanced serotonin level has been shown to support restful sleep, good mood, and decreased sugar cravings. There are several ways to support a healthy serotonin level. L-tryptophan and 5-Hydroxytryptophan (5-HTP) are both precursors to serotonin. However, supplementation with 5-HTP is preferable, because unlike L-tryptophan, 5-HTP cannot be shunted into other uses in the body, such as niacin or protein production. 5-HTP is well absorbed by the body and easily crosses the blood-brain barrier where it can increase the synthesis of serotonin in the central nervous system. And 5-HTP can be taken with meals without reducing its effectiveness. 5-Hydroxytryptophan (5-HTP) is the intermediate metabolite the body produces when it initiates the process of converting the essential amino acid L-tryptophan to serotonin. Therefore, supplementation with 5-HTP will bypass the conversion of L-tryptophan into 5-HTP by the enzyme tryptophan hydroxylase – which is the rate-limiting step in the synthesis of serotonin – and is a conversion that can be inhibited by a number of factors, including stress, insulin resistance, increasing age, and deficiencies of vitamin C, folate, and iron.  5-HTP is well absorbed when taken orally, with about 70 percent going into the bloodstream. Intestinal absorption of 5-HTP does not require the presence of a transport molecule, and its absorption is not affected by the presence of other amino acids; therefore, 5-HTP can be taken with meals without reducing its effectiveness. 5-HTP has been shown to have a beneficial impact on mood, sleep, carbohydrate cravings, and discomfort associated with fatigue. Numerous studies of individuals with negative mood status have shown significant positive response with 50-300 mg of 5-HTP daily. To further facilitate serotonin production, Thorne's 5-HTP formula contains pyridoxal 5'-phosphate, the active form of vitamin B6 and the necessary cofactor for the conversion of 5-HTP to serotonin. 5-HTP is commercially produced by extraction from the seeds of the African plant, Griffonia simplicifolia.

5-HTP, 100 mg, 60 Veggie Caps

Science-Based Nutrition™Dietary SupplementVegan / Non-GMO / Gluten Free / Soy FreeDoctor's Best 5-HTP (5-hydroxy L-tryptophan) contains a naturally occurring metabolite of the amino acid tryptophan. 5-HTP is extracted from the seeds of the Griffonia simplicifolia plant. 5-HTP is converted in the brain to serotonin, a neurotransmitter substance found at the junctions (synapses) between neurons. It produces a calming and relaxing effect providing support to help maintain mental, emotional well-being, and to promote healthy sleep.Doctor's Best 5-HTP is tested to ensure that it does not contain "Peak X."Helps promote healthy sleepHelps promote calm and relaxationHelps Support mental and emotional well-being

5-HTP, Time Release, Maximum Strength, 200 mg, 30 Tablets

Mood & amp; StressPromotes A Calm & amp; Relaxed Mood100% Drug-FreeVegetarianDietary SupplementNatrol® 5-HTP 200 mg Time Release:Promotes a calm, relaxed mood and helps maintain a positive outlook.Helps reduce occasional anxiety.Enables production of Serotonin.Controlled Release Tablet - promotes a calm and relaxed mood throughout the day.100% Drug-free and non-habit forming.

5-HTP, 100 mg, 60 Veggie Caps

5-HydroxytryptophanSupports Serotonin SynthesisDietary SupplementGluten Free & nbsp;Vegan & nbsp;Veggie Caps & nbsp;Non GMO Certified by NSFSuitable for Vegetarians/VegansJarrow Formulas® 5-HTP (5-Hydroxytryptophan) is an extract of Griffonia simplicifolia seeds from coastal West Africa. Purity is assured by HPLC. 5-HTP is the direct metabolic precursor of serotonin and is important for the production of melatonin, a hormone secreted by the pineal gland that aids biorhythm regulation.

5-HTP, 100 mg, 90 Vegetable Capsules

Since 1947Positive Mood SupportPromotes RelaxationNon-GMOCertified Gluten FreeWheat & amp; Dairy FreeSuitable for VegansHalalKosher ParveDietary SupplementThis product provides natural-source 5-HTP. 5-HTP supports your brain's production of serotonin. This formulation helps to promote both a positive mood and a state of relaxation.

5-HTP, Natural Citrus Flavor, 100 mg, 90 Chewables

ChewableNeurotransmitter SupportNatural Citrus Flavors!Supports Positive MoodA Dietary SupplementVegetarian - VeganKosherAmino AcidsFamily Owned since 1968GMP Quality Assured5-HTP, the intermediate metabolite between the amino acid tryptophan and serotonin, is extracted from the seed of an African plant (Griffonia simplicifolia).

5-HTP, 50 mg, 60 Tablets

Since 1969L-5-Hydroxytryptophan - Vitamin B6 & amp; CGriffonia Bean Extract - 50 mg Per TabletPrecursor to SerotoninEnteric CoatedMood & amp; AppetiteDietary SupplementVegetarian5-HTP is a mood/appetite regulating neurotransmitter.

5-HTP, Enhanced with Vitamins B6 & C, 120 Veggie Caps

Science-Based Nutrition™Dietary SupplementHelps Support Mental and Emotional Well-BeingNon-GMO / Gluten Free / Soy Free / Vegan & nbsp;Doctor's Best 5-HTP (5-hydroxy L-tryptophan) contains a naturally occurring metabolite of the amino acid tryptophan. 5-HTP is extracted from the seeds of the Griffonia simplicifolia plant. Vitamin B6 and Vitamin C are important co-factors in the 5-HTP's conversion to serotonin, a neurotransmitter substance found at the junctions (synapses) between neurons. 5-HTP provides support to help maintain mental and emotional well-being and promotes healthy sleep.Doctor's Best 5-HTP is tested to ensure that it does not contain "Peak X".Helps support mental and emotional well-being.Helps promote healthy sleep.

Stress-Relax, 5-HTP, 100 mg, 60 Time Release Caplets

Dietary Supplement5-HydroxytryptophanEmotional Well-BeingSuitable for Vegetarians/VegansSupplementing with 5-HTP provides natural support for emotional well-being, and caplets are time released to minimize gastric discomfort and optimize absorption. Natural Factors amino acids are the highest quality pharmaceutical grade products available.Isura™: & nbsp;Non-GMO: Documentation ✔Mass Spec: Lab Tested ✔

Double Potency, 5-HTP Extra, 60 Liquid Soft-Gels

Mood & amp; Relaxation5-HTP for Serotonin ProductionPlus L-Theanine, Lemon Balm, Saffron and Holy BasilDietary SupplementDouble Potency 5-HTP Extra is a comprehensive formula designed to support mood and relaxation. Central to this formulation is 5-Hydroxytryptophan (5-HTP), a naturally occurring amino acid that is the immediate precursor of Serotonin. This plant derived compound sourced from the Griffonia simplicifolia, a climbing shrub native to West and Central Africa, helps the body to naturally produce this hormone, helping you attain an improved state of well-being.To complement the benefits of 5-HTP, this product also features L-Theanine that helps to increase alpha brain waves thereby supporting relaxation of the mind and body. This product also includes other botanicals such as Holy Basil and Damiana that have been used in traditional mood formulas and are known for their adaptogenic properties. This product can be taken daily to help support mood and relaxation, and in doing so, helps promote a more balanced state of mind.What makes us different:Liquid Soft-Gels - The nutrients in these easy-to-swallow Liquid Soft-Gels are released fast. Other forms of delivery can contain binders and fillers that may cause stomach upset and offer no nutritional value. Advanced Liquid Soft-Gels provide an optimum delivery system.Quality Assurance - Irwin Naturals® is committed to providing the highest quality products for your health. We employ compliance testing to ensure purity and potency.Patented BioPerine - & nbsp;Our special BioPerine Complex enhances the bioavailability, absorption and potency of many nutrients.

5-HTP, Mood Support, Griffonia Simplicifolia Extract from Switzerland, 100 mg, 90 Veggie Capsules

California Gold Nutrition® 5-HTP Sourced from SwitzerlandSupports Healthy Mood, Sleep & amp; Appetite*Helps to Support Production of Serotonin*90 Veggie Capsules Suitable for VegetariansProduced in a 3rd Party Audited cGMP Registered (Certified) FacilityFormulated to Contain: No Gluten – No GMOs – No Soy100% Gold Guarantee5-HTP (5-Hydroxytryptophan) is extracted from the seeds of the Griffonia Simplicifolia plant and is a precursor to the neurotransmitter serotonin. Research has shown that supplementing with 5-HTP may help to support a healthy mood as well as healthy sleep and appetite.*California Gold Nutrition® 5-HTP is sourced from Switzerland and is manufactured in the USA under strict Quality Control standards.

5-HTP, 100 mg, 60 Capsules

Supports a Calm and Relaxed MoodDietary SupplementGuaranteed QualityLaboratory TestedSodium FreeNearly 50 Years of Trusted QualityAt Nature's Bounty, we are committed to your health. For nearly 50 years we have been making trusted products, backed by science, and made with only the purest ingredients...guaranteed. So you can get the most out of life every day.

5-HTP, Fast Dissolve, Extra Strength, Wild Berry , 100 mg, 30 Tablets

Mood & amp; StressPromotes a Calm & amp; Relaxed Mood100% Drug-FreeNatural FlavorVegetarianDietary SupplementNatrol® 5-HTP 100 mg Fast Dissolve:Promotes a calm, relaxed mood and helps maintain a positive outlookHelps reduce occasional anxietyEnables production of Serotonin100% Drug-free and non-habit formingFast Dissolve form—take anytime, anywhere; no water needed

5-HTP Plus+, 200 mg, 30 Vegetarian Capsules

Promotes Well-Being and Sleep & nbsp;Vitamin B6 for Serotonin Conversion & nbsp;Supports Appetite Control* & nbsp;Dietary Supplement & nbsp;Vegan & nbsp;Plant Based & nbsp;Non-GMO & nbsp;Non Stimulating & nbsp;Mood, Stress & amp; Sleep Support & nbsp;5-HTP is a plant-based mood support supplement that promotes the production of serotonin in the brain to help reduce stress, curb cravings, and encourage healthy sleep patterns. Our 5-HTP Plus+ formula includes Vitamin B6 to assist with the conversion of 5-HTP into serotonin. & nbsp;

Stress-Relax, 5-HTP, 100 mg, 120 Time Release Caplets

Dietary Supplement & nbsp;Stress-Relax5-Hydroxytryptophan & nbsp;Emotional Well-Being & nbsp;Supplementing with 5-HTP provides natural support for emotional well-being, and caplets are time released to minimize gastric discomfort and optimize absorption. These amino acids are the highest quality pharmaceutical grade products available.Isura™:Non-GMO: Documentation ✔Mass Spec: Lab Tested ✔

5-HTP, Mood & Stress, 50 mg, 45 Capsules

Promotes a Calm & amp; Relaxed MoodHelps Reduce Occasional Anxiety100% Drug-FreeDietary SupplementNatrol® 5-HTP 50 mg:Promotes a calm, relaxed mood and helps maintain a positive outlookHelps reduce occasional anxietyEnables production of Serotonin100% Drug-free and non-habit forming

5-HTP, 50 mg, 90 Veggie Caps

5-HydroxytryptophanSupports Serotonin SynthesisDietary SupplementGluten FreeVeganNon GMO Certified by NSFJarrow Formulas® 5-HTP (5-Hydroxytryptophan) is an extract of Griffonia simplicifolia seeds from coastal West Africa. Purity is assured by HPLC. 5-HTP is the direct metabolic precursor to serotonin and is important for the production of melatonin, a hormone secreted by the pineal glad that aids biorhythm regulation.

5-HTP, 50 mg, 50 Vegan Capsules

Established 19715-HydroxytryptophanSupports Serotonin ProductionDietary SupplementCertified B Corporation—Our Pledge of Integrity—AuthenticityCleanlinessFreshnessConsistencyAccuracy5-HTP is a natural conversion of the amino acid, L-tryptophan. It supports the production of serotonin in the brain.YESCertified Gluten-Free by GFCO.orgNOYeast, Corn or WheatYESCertified Vegan by the AVANOSoy or MilkYESRecyclable PackagingNOSalt or SugarYESManufacturing Supports Wind PowerNOPreservativesYESKosher ParveNOArtificial Colors or FlavorsYESCertified Halal by IFANCANOArtificial SweetenersThis product has been manufactured at a GMP Registered facility.

Stress-Relax, 5-HTP, 50 mg, 60 Time Release Caplets

Dietary SupplementStress-Relax5-HydroxytryptophanEmotional Well-BeingSuitable for Vegetarians/Vegan5-HTP is an intermediate metabolite between L-tryptophan and serotonin. Supplementing with 5-HTP provides natural support for sleep and emotional well-being. & nbsp;Time release caplets minimize gastric discomfort and optimize absorption. Natural Factors amino acids are the highest quality pharmaceutical-grade products available. & nbsp;Isura™:Non-GMO: Documentation ✔Mass Spec: Lab Tested ✔

5-HTP, 200 mg, 180 Vegan Tablets

Griffonia Seed Extract & nbsp;Food Supplement & nbsp;

5-HTP, 50 mg, 30 Tablets

Since 1969L-5-HydroxytryptophanVitamin B6 & amp; CGriffonia Bean Extract • 50 mg Per TabletPrecursor to SerotoninEnteric CoatedMood & amp; AppetiteDietary SupplementGluten FreeVegetarian5-HTP is a mood/appetite regulating neurotransmitters.

5-HTP Plus, 200 mg, 60 Capsules

NutritionWith Co-Factor B6Plus Serotonin SynthesizersSupports Brain Function, Mood & amp; SleepDietary SupplementVegan FriendlyGluten Free5-HTP Enhanced Super Formula: The addition of serotonin synthesizers, SAMe and L Tryptophan assist in the conversion between 5-HTP and serotonin, increasing the effectiveness of the 5-HTP Plus formula.B6 for Improved Serotonin Conversion: The high dosage of B6 available within our 5-HTP formula is a main co-factor necessary in the conversation of 5-HTP into serotonin. Even a slight B6 deficiency can inhibit the efficacy of 5-HTP, which is why the high dosage in our formula is so essential.Mood, Anxiety, & amp; Sleep Support: As the primary precursor to serotonin production in the body, 5-HTP is a necessary ingredient for successful serotonin conversion. Studies show that increased levels of serotonin relieve anxiety, encourage positive mood, and promote soundful sleep. & nbsp;Backed by Science for Superior Results: Dr. Emil’s unique experience as a medical doctor and highly-regarded authority in the supplementation field ensures our vitamins are always uniquely formulated with value in mind so customers experience exceptional results that are always backed by science. & nbsp;No Harmful Additives: Dr. Emil’s supplements are formulated with only the best, all natural vitamins, minerals, and herbal extracts in mind. Our products never include GMOs or additives you can’t pronounce. Just good, honest ingredients. & nbsp;

Daily Stress Relief, Time Release, 30 Tablets

Mood SupportPromotes a Calm & amp; Relaxed Mood Throughout the Day100% Drug FreeNon-Habit FormingVegetarianDietary SupplementNatrol® Daily Stress Relief & nbsp;is a natural and drug-free way to help restore a sense of calm and balance. It is scientifically formulated with a blend of nutrients that help regulate and support serotonin, a chemical in the body responsible for enhancing mood. The calming formula releases over time, helping you to have a more positive and balanced outlook throughout the day.Natrol® Daily Stress Relief supports healthy serotonin levels for a calm and relaxed mood throughout the day.Drug free.Non-habit forming.Time release formula.Vegetarian.No artificial flavors, colors or preservatives.Today is a good day to have a good day.

5-HTP, 200 mg, 60 Veg Capsules

(5-Hydroxytryptophan)Supports a Positive MoodWith Glycine, Taurine & amp; InositolNon-GMOA Dietary SupplementVegetarian/VeganHow It Work: & nbsp; 5-HTP is the intermediate precursor in the natural synthesis of serotonin, a neurotransmitter that helps to regulate mood, appetite, and sleep/wake cycles. 5-HTP readily crosses the blood-brain barrier and clinical studies suggest that 5-HTP can support health serotonin levels. Serotonin is associated with positive mood and provides a substrate for the production of melatonin. This formula includes B-Vitamins as cofactors, and is further enhanced with Glycinate, Taurine, and Inositol.

5-HTP, 50 mg, 180 Veg Capsules

Neurotransmitter SupportSupports a Positive MoodNon-GMOA Dietary SupplementVegetarian/VeganKosherAmino AcidsFamily Owned Since 1968GMP Quality Assured5-HTP, the intermediate metabolite between the amino acid L-tryptophan and serotonin, is extracted from the seed of an African plant (Griffonia simplicifolia).

5-HTP, 100 mg, 60 Vegan Capsules

Mood SupportGluten FreeCertified VeganNon-GMO Project VerifiedDietary SupplementPromotes Positive Mood & amp; Sleep PatternsMay Help Control Appetite

5-HTP, 50 mg, 60 MicroLingual Instant Dissolve Tablets

GMO FreeMood ElevatorDietary SupplementOur Instant Dissolve MicroLingual® Tablets may be small but they are full potency! Typical tablets and capsules need to be swallowed and are inefficiently absorbed in the digestive system. MicroLingual® tablets dissolve immediately under the tongue heading straight into the body. Our proprietary hydrodrying process results in fewer inactive binders and fillers and a higher ratio of nutritional ingredients—hence the small size. They efficiently provide your body with the nutrients you need right now."Less is More"Simplicity • Purity • EfficiencyNo pills to swallowPlace on or under the tongueDissolves on contactPreservative free

Sunny Mood with 5-HTP, Plus Vitamin D3, 80 Liquid Soft-Gels

Uplifting Feel Good FormulaWith 200 mg of Relaxing 5-HTP for Serotonin ProductionDietary SupplementNo Preservatives AddedPass Quality Tested GuaranteedHighly Specialized ProductsSunny Mood® with 5-HTP is specially formulated to support emotional well-being and relaxation. This product helps boost the body's natural production of serotonin, a key brain messenger for positive mood and mental balance. Magnesium helps to convert 5-HTP into serotonin, while Chromium helps maintain healthy blood glucose levels already within the normal range.Sunny Mood® with 5-HTP also helps maintain balance with the adaptogen Rhodiola, L-Theanine which supports a calm yet alert state of mind, and other ingredients traditionally used in relaxing formulas, such as Passionflower and Lemon Balm. Our proprietary BioPerine Complex completes the formula to promote optimal nutrient absorption.Sunny Mood with 5-HTP is nourishing and drug-free, ideal for daily use.What makes us different:Liquid Soft-Gels & nbsp;- The nutrients in these easy-to-swallow Liquid Soft-Gels are released fast. Other forms of delivery can contain binders and fillers that may cause stomach upset and offer no nutritional value. Advanced Liquid Soft-Gels provide an optimum delivery system.Quality Assurance - Irwin Naturals is committed to providing the highest quality products for your health. We employ compliance testing to ensure purity and potency.Patented BioPerine® - Our special BioPerine Complex enhances the bioavailability, absorption and potency of many nutrients.