L-Tryptophan 500 mg by Now Foods – Relaxation and Sleep Support Amino Acid
L-Tryptophan 500 mg capsules by Now Foods supply an essential amino acid in vegetarian capsules for adults seeking nutritional support for relaxation and healthy sleep patterns. This single-active-ingredient formula provides free-form L-tryptophan rather than a blend of herbs or added melatonin.
Each capsule supplies 500 mg, while the Supplement Facts panel lists 1 g per two-capsule serving. The product comes in 60- and 120-capsule bottles. Both sizes provide the same active ingredient and strength, but their filed labels list different capsule ingredients, detailed below. That distinction matters when choosing a bottle around ingredient preferences or sensitivities.
Key L-Tryptophan 500 mg Benefits
- Provides an essential amino acid that the body must obtain through nutrition rather than make for itself.
- Supplies a building block for serotonin production, part of the body's normal mood-regulating chemistry.
- Supports the nutritional pathway leading to melatonin, which helps coordinate healthy sleep and waking rhythms.
- Offers targeted relaxation support through one amino acid rather than multiple active ingredients.
How L-Tryptophan 500 mg Works
Tryptophan has several jobs after it is absorbed. Some becomes part of the proteins your body builds and renews. Some enters pathways that produce other compounds, including serotonin. The body can then convert serotonin into melatonin, a hormone involved in its daily timing signals. These roles explain why tryptophan is relevant to both mood support and healthy sleep patterns.
Taking tryptophan is not the same as taking melatonin directly. It supplies an earlier nutritional building block, and the body regulates how it is used. A capsule is also not a replacement for dietary protein: food supplies a wider range of amino acids. This formula is a focused addition to nutrition, not a complete protein supplement.
Key Functional Ingredients Include:
- L-Tryptophan: Supports normal serotonin synthesis by supplying the amino acid from which serotonin is made. Serotonin also serves as a starting material for melatonin, connecting tryptophan nutrition with the body's normal sleep-wake signaling. This essential nutrient additionally participates in protein synthesis; it is not itself a hormone.
L-Tryptophan 500 mg Is Formulated For
- Adults considering a single-ingredient sleep support supplement rather than an herbal combination.
- People who prefer vegetarian capsules and want to compare the capsule ingredients for each bottle size.
- Adults whose physician has reviewed whether tryptophan fits their medication list, health history, and nighttime routine.
Supplements support your health but do not replace a balanced diet. Always check with your healthcare practitioner if you have doubts about a new supplement. Or you may book a FREE product consultation with Holistic Health Partners, led by Carolyn Mulally BS, RN, HN-BC. You may also wish to explore our other Sleep Supplements, Amino Acids Supplements, and Mood Support Supplements collections.
Recommendation: Take 1-2 capsules 2 to 3 times daily on an empty stomach, with final dose at bedtime, or as directed by your physician.
Serving Size: 2 Veg Capsules
Servings Per Container: 60-capsule bottle: 30; 120-capsule bottle: 60.
60-capsule bottle:
L-Tryptophan (Free-Form) ... 1 g (1,000 mg)**
** Daily Value not established.
120-capsule bottle:L-Tryptophan (Free-Form) ... 1 g (1,000 mg)*
* Daily Value not established.
Other Ingredients:
60-capsule bottle: Hypromellose (cellulose capsule), Rice Flour, Ascorbyl Palmitate and Stearic Acid (vegetable source).
120-capsule bottle: Cellulose (capsule), Cellulose Powder and Stearic Acid (vegetable source).
Does Not Contain:
60-capsule bottle: Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish, tree nut or sesame ingredients. Produced in a GMP facility that processes other ingredients containing these allergens.
120-capsule bottle: Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish or tree nut ingredients. Produced in a GMP facility that processes other ingredients containing these allergens.
Storage: Store in a cool, dry place after opening.
120-capsule bottle: Do Not Eat Freshness Packet. Keep in Bottle.
Natural color variation may occur in this product.
Frequently Asked Questions About L-Tryptophan 500 mg
What are the benefits of L-Tryptophan 500 mg?
L-Tryptophan 500 mg supplies an essential amino acid involved in protein building and the production of serotonin and melatonin. Those nutritional roles connect this Now Foods formula with relaxation, normal mood balance, and healthy sleep patterns. Each capsule contains 500 mg; the labeled two-capsule serving provides 1 g. It is a single-active-ingredient option rather than a melatonin or herbal blend. Taking a precursor does not guarantee a particular sleep response, and it does not replace a consistent sleep routine.
Who should take L-Tryptophan 500 mg?
This Now Foods product is labeled for adults only and suits adults considering targeted tryptophan supplementation in vegetarian capsules. It comes in 60- and 120-capsule sizes with the same active strength, but the filed labels list different other ingredients. Review the relevant bottle's ingredient list before choosing. A physician should assess use during pregnancy or nursing, with a medical condition, or alongside medication, especially antidepressants such as SSRIs and MAOIs. It is not a children's supplement or a substitute for dietary protein.
Are there any side effects of taking L-Tryptophan 500 mg?
May cause drowsiness. Do not use with alcoholic beverages or while operating heavy machinery. Caution: For adults only. Consult physician if pregnant/nursing, taking medication (especially antidepressants such as SSRIs and MAOIs), or have a medical condition. Keep out of reach of children. The 120-capsule label also states: Do Not Eat Freshness Packet. Keep in Bottle. Both labels carry an allergen-processing caution; review the size-specific statement above if you have food allergies. Do not assume this amino acid is appropriate alongside your medicines without professional review.
How does L-Tryptophan 500 mg support overall health?
Tryptophan is a nutrient the body cannot make, so it must come from nutrition. It contributes to protein synthesis and provides starting material for serotonin, which can subsequently be converted to melatonin. These are distinct but connected physiological roles, not a promise that one capsule will change mood or sleep. Now Foods provides free-form tryptophan in 500 mg capsules for focused supplementation. Continue eating protein-containing foods for a broader amino acid supply and follow the label's empty-stomach directions and drowsiness precautions.
These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease.