Evidence supporting the use of: L-tryptophan
For the body system: Glandular System
Synopsis
Source of validity: Scientific
Rating (out of 5): 3
L-tryptophan is an essential amino acid that serves as a precursor to serotonin, a neurotransmitter involved in regulating mood, sleep, and appetite. Scientific research has shown that L-tryptophan supplementation can influence serotonin production in the brain, which can indirectly impact endocrine (glandular) function, especially via the hypothalamic-pituitary-adrenal (HPA) axis. Some studies have explored L-tryptophan’s effects on hormonal balance and stress response, but most research focuses on its neuropsychiatric effects rather than direct support of the endocrine glands themselves. There is moderate evidence that L-tryptophan can help with sleep and mood disorders, which may involve the pineal gland (melatonin production) and other neuroendocrine pathways. However, robust clinical trials directly linking L-tryptophan supplementation to improved overall glandular system health are limited. Thus, while there is a plausible biological mechanism and some supporting data, the evidence is moderate and more indirect than direct. Historically, L-tryptophan has not been widely used specifically for glandular support, and its use in this context is primarily grounded in its role as a serotonin precursor rather than traditional herbal or nutritional glandular support.
Other ingredients that support Glandular System
7,8-Dihydroxyflavone7-Keto-DHEA
Acemannan
adrenal cortex
Agnuside
Ajuga
Alfalfa
Algae
amino acids
Anamarrhena
Anemarrhena
anemarrhena asphodeloides
animal protein
antler
Aralia
Ascophyllum nodosum
ashitaba
Ashoka
ashwagandha
Asteraceae
astragalus
babassu
babchi
banyan
barbasco
Barleria
basil
bee pollen
bee products
beef
Beef liver
Berberis (unspecified)
Bidens pilosa
black cohosh
black seed
bladderwrack
blue cohosh
bovine
bovine kidney
bovine liver
bovine pancreas
bovine protein
Brassica
Brazil nut
broccoli
Brown Algae
Brussel sprouts
Bulbine natalensis
Bupleurum
bupleurum falcatum
bасора
Camellia sinensis
Canscora
capsicum
caterpillar mushroom
Ceanothus integerrimus
Celastrus
chaga mushroom
chaste tree
Chinese mountain ant
Chinese thoroughwax
Cinnamomum
cinnamon
Clary sage
cod liver oil
Codonopsis
coenzyme Q10 (CoQ10)
colostrum
Coptis chinensis
cordyceps
cowage seed
cruciferous
Cucurbita
Cyanotis vaga
dandelion
deer velvet
Dendrobium
devil\'s club
DHEA
DHEA (dehydroepiandrosterone)
Didymocarpus
diiodotyrosine
DIM (diindolylmethane)
dioscorea
diosgenin
dong quai
dong quai root
dwarf morning glory
eleuthero
elk antler
essential oil blend
eucommia
Eucommia ulmoides
Eurycoma Longifolia
eurycomanone
Fadogia agrestis
false unicorn root
fat liver oil
fatty acids
fennel
fenuside
figwort
flat-stem milk-vetch
fo-ti
forskohlii root
forskolin
fruit and vegetable blend (proprietary)
fungus
furostanols
gamma linolenic acid (GLA)
ganoderma
garlic bulb
gastrodia
ginseng
Ginsenosides
Glycyrrhizin
gokhru
golden eardrops
gooseberry
Greek mountain tea
green tea
greens blend (proprietary)
guayusa
Gugglesterone
guggul
Guggulsterones
heal-all
Hedychium spicatum
herbal blend (proprietary)
Himalayan salt
horny goat weed
Indian nightshade
Indian sarsparilla
iodine
iron
isothiocyanates
jasmine
Jatamansi
jiaogulan
jujube
Kachnar
kale
kelp
ketosterones
L-tryptophan
l-tyrosine
Laminaria
lavender
Leptadenia
licorice root
lingzhi
linoleic acid (LA)
liquid liver fractions
lophatherum leaf
Loranthus
lotus seed
Lycium
maca
macaenes
macamides
magnesium
maitake mushroom
mandrake
manganese
Marjoram
Melatonin
Milk thistle
Molasses
Monoterpenes
Moringa
Mormon Tea
Motherwort
Mushroom
Nettle
Niacin (vitamin B3)
Nigella seed
noni
Nymphaea caerulea
oleanolic acid
omega-6 fatty acids
onion
Ophiopogon
oriental arborvitae
pantothenic acid (vitamin B5)
parsley
Pentacyclic triterpenoids
Phyllanthus
phytocannabinoids
Pipsissewa
Polygala
Polygonatum
polyphenols
pregnenolone
Progenin III
protein
Protodioscin
pumpkin
pyridoxal-5-phosphate (P-5-P)
red clover
Rehmannia
rehmannia glutinosa
reishi mushroom
Rhaponticum
Rhodiola
riboflavin (vitamin B2)
rockweed
Rosabin
Rosarin
rosavins
rose oil
Rosy conk
royal jelly
Safed musli
sage
Salmon Oil
Salvia
Sandalwood
Sapogenin
Sargassum
saw palmetto
Schisandrins
Schizandrol A
scrophularia root
seaweed
selenium
Selenocysteine
Selenomethionine
Self-Heal
Semecarpus anacardium
sesame
Sesquiterpenes
Shankhpushpi
Shataverins
Smilagenin
soybean
Sulforaphane
suma
Taraxacum
Tea
thyroid substance
Tinospora cordifolia
Tongkat ali
trace minerals
tribulus
Tribulus Terrestris
Trichilia catigua
Triterpenes
turmeric
turmeric
Typhonium flagelliforme
vegetable blend (proprietary)
Vegetable Protein
velvet bean
Vervain
Vetiver
vitamin A
vitamin B
vitamin B6
vitamin C
vitamin D
vitamin D3
vitamin E
Vitex Agnus-Castus
Vitexicarpin
Wakame
Watercress
Waterhyssop
wheat grass
whole adrenal glandular
Wild yam
Withanolides
Xanthorrhizol
Zinc
β-nicotinamide mononucleotide (NMN)
Other body systems supported by L-tryptophan
BrainGlandular System
Hypothalamus
Nerves
Pineal Gland
Serotonin
Specific Neurotransmitters
Products containing L-tryptophan
Designs For Health
Amino Acid Supreme™
Thorne
Amino Complex Berry
Thorne
Amino Complex Lemon
Pure Encapsulations
Amino-NR
Pure Encapsulations
Amino Replete
Metagenics
BioPure Protein® Powder
Pure Encapsulations
Cognitive Aminos
Pure Encapsulations
Essential Aminos
Klean Athlete
Klean Essential Aminos + HMB®
Klean Athlete
Klean Isolate ™
Pure Encapsulations
L-Tryptophan
Pure Encapsulations
L-Tryptophan
Douglas Laboratories
L-Tryptophan
Douglas Laboratories
Muscle Protect™ with HMB®
Metagenics
Perfect Protein® Pea & Rice Chocolate Powder
Metagenics
Perfect Protein Pea & Rice Vanilla Powder
Metagenics
Perfect Protein Whey Chocolate
Metagenics
Perfect Protein Whey Vanilla
Thorne
RecoveryPro NSF
Metagenics
Ultra Glucose Control® Chocolate
Metagenics
Ultra Glucose Control Chocolate
Metagenics
Ultra Glucose Control Vanilla
Metagenics
Ultra Glucose Control Vanilla
Metagenics
UltraGI Replenish® Chocolate
Metagenics
UltraGI Replenish Chocolate
Metagenics
UltraGI Replenish Vanilla
Metagenics
UltraGI Replenish Vanilla
Metagenics
UltraInflamX Plus 360°® Chocolate/Orange
Metagenics
UltraInflamX Plus 360° Mango
Metagenics
UltraInflamX Plus 360° Mango
Metagenics
UltraInflamX Plus 360° Orange
Metagenics
UltraInflamX Plus 360° Original Spice
Metagenics
UltraInflamX Plus 360° Pineapple/Banana
Metagenics
UltraInflamX Plus 360° Pineapple/Banana
Metagenics
UltraMeal Advanced Protein® Dutch Chocolate
Metagenics
UltraMeal Advanced Protein French Vanilla
Metagenics
UltraMeal Advanced Protein Plain
Metagenics
UltraMeal Cardio 360°® Pea/Rice Chocolate
Metagenics
UltraMeal Cardio 360° Pea/Rice Vanilla