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Mood support, relaxation, sleep support
Adults seeking simple amino acid support for evening wind-down or those with busy, high-stress lifestyles.
Take 1 tablet three times daily between meals, preferably with fruit juice; for restful sleep, take 3 tablets before bedtime. Taking on an empty stomach may improve uptake; avoid combining with serotonergic supplements or medicines.
Non-GMO Validated; Suitable for Vegetarians; Contains no yeast, dairy, egg, gluten, soy or wheat; No preservatives, artificial colour, flavour or fragrance.
L-tryptophan is converted into 5-HTP and then serotonin and melatonin, which may influence mood, relaxation and sleep-wake regulation.
Caution: May interact with antidepressants such as SSRIs or MAOIs because it can raise serotonin levels; start cautiously and avoid combining without professional guidance.
Calcium acts as a signalling mineral in nerves and muscles and supports enzyme activity and bone mineralisation.
Caution: High total calcium intake from diet and supplements may cause digestive discomfort; consider overall daily intake.
Iron supports oxygen transport as a component of haemoglobin and cellular energy production in mitochondria.
Caution: Accidental overdose in children can be harmful; store securely and keep out of reach.
L-tryptophan provides the amino acid precursor used to form serotonin and melatonin, guiding mood and sleep pathways. The small amounts of calcium and iron contribute general mineral support but do not materially change L-tryptophan’s core role.
Label Warning: If you are pregnant, planning pregnancy, breastfeeding, or taking medications such as SSRIs or MAOIs, consult a healthcare professional before use.
Who should be cautious: People using antidepressants such as SSRIs, SNRIs, or MAOIs due to serotonin syndrome risk. Those who need to separate iron or calcium from certain medications to avoid reduced absorption. Individuals with sleep disorders or mood concerns should seek guidance. As this product contains L-tryptophan, which may interact with serotonergic medicines, consult a healthcare provider before combining with medications that may cause interaction.
Storage: Store in a cool, dry place.
This product is guaranteed authentic and backed by our easy returns and refunds policy. Details
Sleep formulas often combine ingredients like tryptophan and herbs to support relaxation and restful sleep.
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 a day, between meals and preferably with fruit juice. To support restful sleep, take 3 tablets before bedtime.
Dibasic calcium phosphate, stearic acid, modified cellulose gum, and silica.
Contains no yeast, dairy, egg, gluten, soy or wheat. Contains no preservatives, or artificial colour, flavour or fragrance.
If you are pregnant, may become pregnant, breastfeeding, or are taking medications such as SSRIs or MAOIs, consult your healthcare 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 products 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 centre 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 be despatched with alternative packaging, freshness is always guaranteed. We recommend that you read labels, warnings and directions of all products before use and do not rely solely on the information provided by iHerb. This website has been machine translated as a courtesy to customers. iHerb does not represent or warrant that the translations are complete or error-free and iHerb is not responsible for any translation errors or omissions.
| 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. | ||
