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Relaxation and calm, Sleep support, Mood balance
Adults with busy or high-stress routines seeking evening relaxation, or those wanting an amino acid option to support sleep-wake rhythm.
Take 1 tablet three times daily between meals, preferably with fruit juice; for sleep support, take 3 tablets before bed. Taking between meals may help absorption because amino acids can compete when taken with protein.
Non-GMO Validated; Suitable for Vegetarians; Contains no yeast, dairy, egg, gluten, soy, or wheat; Contains no preservatives, or artificial color, flavor, or fragrance.
L-tryptophan is converted to 5-HTP and then serotonin and melatonin, which may influence mood regulation, relaxation, and sleep-wake signaling.
Caution: Avoid combining with serotonergic medications such as SSRIs or MAOIs because excess serotonin may cause adverse effects; take between meals as protein can compete for absorption.
Calcium supports normal nerve signaling and muscle function by helping regulate electrical activity across cell membranes.
Caution: Keep total daily calcium intake in mind to avoid excessive amounts, especially if you already use calcium supplements.
Iron serves as a component of proteins involved in oxygen transport and cellular energy metabolism.
Caution: Although the amount is small, iron should be kept away from children due to risk from accidental ingestion.
L-tryptophan serves as a direct precursor for serotonin and melatonin, which relate to relaxation and sleep. The small amounts of calcium and iron contribute to general neuromuscular and metabolic functions but are not primary actives here.
Label Warning: If you are pregnant, may become pregnant, breastfeeding, or are taking medications such as SSRIs or MAOIs, consult a healthcare professional before use. Accidental overdose of iron-containing products can be fatal in children under 6; in case of overdose, call a doctor or poison control center immediately.
Who should be cautious: People using antidepressants that affect serotonin, such as SSRIs, SNRIs, or MAOIs, due to serotonin syndrome risk. Those with sleep disorders or mood concerns should seek personalized advice. If combining with medications that may interact with 5-HTP or L-tryptophan, consult a healthcare provider before use.
Storage: Store in a cool, dry place.
Many users say it helps them fall asleep faster, stay asleep longer, and wake feeling more rested.
Several reviewers mention feeling calmer and in a better mood with regular use.
A few users report mild daytime wooziness or no noticeable effect, and some prefer capsules over tablets for swallowing.
This product is guaranteed authentic and backed by our easy returns & refunds policy. Details
Melatonin may help regulate sleep cycles, complementing tryptophan's role in serotonin production for better sleep quality.
AI generated. Not medical advice.
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The essential amino acid L-tryptophan helps support relaxation, restful sleep, and feeling better. It plays a part in the synthesis of both melatonin and serotonin, hormones involved with mood and stress response. L-Tryptophan also supports immune functions because it is the body's precursor to the kynurenines that regulate immunity. If needed, L-tryptophan converts to niacin in the body, which supports circulation, a healthy nervous system, the metabolism of food, and the production of hydrochloric acid for the digestive system. Source Naturals L-Tryptophan is extremely pure and is regularly tested to ensure the highest standards of quality.
1 tablet three times daily, between meals and preferably with fruit juice. To support restful sleep, take 3 tablets before bed.
Dibasic calcium phosphate, stearic acid, modified cellulose gum, and silica.
Contains no yeast, dairy, egg, gluten, soy or wheat. Contains no preservatives, or artificial color, flavor or fragrance.
If you are pregnant, may become pregnant, breastfeeding, or are taking medications such as SSRIs or MAOIs consult your health care professional before using this product.
Store in a cool, dry place.
Do not use if either tamper-evident seal is broken or missing. Keep out of the reach of children.
Accidental overdose of iron-containing product is a leading cause of fatal poisoning in children under 6. Keep this product out of the reach of children. In case of accidental overdose, call a doctor or poison control center immediately.
While iHerb strives to ensure the accuracy of its product images and information, some manufacturing changes to packaging and/or ingredients may be pending update on our site. Although items may occasionally ship with alternate packaging, freshness is always guaranteed. We recommend that you read labels, warnings and directions of all products before use and not rely solely on the information provided by iHerb.
| Supplement facts | ||
| Serving Size: 3 Tablets | ||
| Servings Per Container: 40 | ||
| Amount Per Serving | %DV | |
| Calcium (as dibasic calcium phosphate) | 48 mg | 4% |
| Iron (naturally occurring) | 0.6 mg | 3% |
| L-Tryptophan (25 mg niacin equivalents) | 1.5 g | † |
| †Daily Value not established. | ||
