What is Source Naturals L-Tryptophan?

Source Naturals L-Tryptophan is a great product to support mood elevation and a restful sleep. L-Tryptophan is an amino acid that helps support relaxation, peaceful sleep, and positive mood. It helps with hormones that are involved in dealing with stress, restless sleep, and mood, as well as playing a part in the effectiveness of the immune system. L-Tryptophan is a dietary supplement to help consumers gain a restful sleep as well as providing them with a feeling of overall positive well-being and good emotional health.


Each capsule contains naturally occurring iron and L-Tryptophan. L-Tryptophan is an amino acid that aids in helping people fall asleep and stay asleep in order to get a good quality rest.
Other ingredients include; gelatin (capsule only), dibasic calcium phosphate, microcrystalline cellulose, silica and magnesium stearate.

The product does not contain any yeast, dairy, egg, gluten, corn, soy, wheat, sugar, starch, salt, preservatives, or artificial colors, flavors or fragrance. This makes it quite suitable for most consumers.


The dosage instructions for Source Naturals L-Tryptophan are a little vague. It appears there are two sets of instructions, depending on what the consumer intends to use the product for. There are also variants between taking the capsule form compared to the powder product. The first states that one capsule should be taken three times a day, in between meals and preferably with fruit juice. These instructions are quite clear. If the product is to be used to gain a good night’s sleep, then three capsules should be taken before bedtime, although how long before bedtime is not stated. It is possible that a total of six capsules can be taken each day, but it is unclear. In regards to the powder, it is fairly similar – ¼ teaspoon three times a day between meals with juice or a ¾ teaspoon in the evening before bed.


Source Naturals L-Tryptophan can be purchased in bottles of 30, 60, 90 or 120 capsules. Consumers are also given the option of purchasing this product in powder form. A bottle of 30 capsules will cost $12.75. Buying the bottle of 120 capsules provides the best value for money at $43.50. The powder comes in 50g and 100g containers costing $39.98 and $77.98 respectively.

Possible Side Effects

No side effects have been listed for this product. However, as it is used as a sleep aid, drowsiness may occur and so consumers should take caution when using this product.

Manufacturer’s Commitment

The manufacturer’s website does not appear to offer any form of guarantee. This is no indication regarding the lack of quality surrounding the product, but it does mean that consumers risk losing money if the product doesn’t work for them.

The Bottom Line

Source Naturals L-Tryptophan offers consumers a great product that can be ingested in a variety of ways, whatever suits them best. It helps lift mood and create a feeling of positivity as well as offering a restful night’s sleep. The lack of guarantee may put some potential consumers off, but the many pricing options mean that any wary consumers can buy a smaller amount for a very reasonable price and see the results for themselves.

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