Our proprietary “Star-Rating” system was developed to help you easily understand the amount of scientific support behind each supplement in relation to a specific health condition. While there is no way to predict whether a vitamin, mineral, or herb will successfully treat or prevent associated health conditions, our unique ratings tell you how well these supplements are understood by the medical community, and whether studies have found them to be effective for other people.
For over a decade, our team has combed through thousands of research articles published in reputable journals. To help you make educated decisions, and to better understand controversial or confusing supplements, our medical experts have digested the science into these three easy-to-follow ratings. We hope this provides you with a helpful resource to make informed decisions towards your health and well-being.
|1 to 2 grams at bedtime||[3 stars] L-tryptophan has been used successfully for people with insomnia in many studies,including double-blind trials.|
|2 to 4 grams per day||[3 stars] Double-blind research has also shown that oral L-tryptophan can increase tolerance to acute pain.|
|2 to 6 grams per day, during the second half of the menstrual cycle||[3 stars] Some research suggests that L-tryptophan may help balance mood symptoms associated with PMS.|
|3 to 6 grams per day||[2 stars] Several controlled trials have found L-tryptophan as effective as antidepressant medications. Depressed people should consult a doctor before use.|
|6 grams per day (only under a doctor's supervision)||[2 stars] With a doctor's supervision, some people with OCD have experienced some symptom relief from supplementing with L-tryptophan.|
|1 to 8 grams per day (under a doctor's supervision)||[2 stars] L-tryptophan supplementation has occasionally been helpful for specific schizophrenia symptoms, such as aggression and memory function.|
Seasonal Affective Disorder
|With doctor's supervision, 2 to 4 grams per day, increasing up to 6 grams if no improvement||[2 stars] Some research suggests that L-tryptophan alone or in combination with light therapy may improve SAD symptoms.|
|Refer to label instructions||[1 star] |
Research suggests a connection between anxiety and serotonin deficiency and that its precursur L-tryptophan may help reduce anxiety in people with social axiety disorder and neurosis.
Attention Deficit–Hyperactivity Disorder
|Refer to label instructions||[1 star] Imbalances in the brain chemical serotonin, or low blood levels of its precursor, L-tryptophan, have been associated with ADHD in some (though not all) studies|
|Refer to label instructions||[1 star] L-tryptophan may be beneficial for people with bulimia, as this amino acid synthesizes serotonin, a hormone that helps regulate food intake and appetite.|
|Refer to label instructions||[1 star] Vitamin B6, when taken with L-tryptophan, has been shown to improve eating behavior, feelings about eating, and mood among women with bulimia.|
|Refer to label instructions||[1 star] The brain chemical serotonin may affect blood pressure regulation, and animal research suggests its precursur L-tryptophan may help prevent and manage hypertension.|
|Refer to label instructions||[1 star] Preliminary research has found abnormally low levels of serotonin in the brains of people suffering a migraine attack, which was reversed with L-tryptophan supplements.|
|Refer to label instructions||[1 star] Animal research and preliminary human reports suggest that serotonin precursors such as L-tryptophan might help control appetite and promote weight loss.|
Restless Legs Syndrome
|1 to 2 grams at bedtime||[1 star] |
Preliminary research has shown some benefit reducing symptoms of restless legs syndrome and the insomnia that often accompanies it.
|Refer to label instructions||[1 star] In one study, tryptophan supplements along with a high-carbohydrate diet lessened withdrawal symptoms and helped people smoke fewer cigarettes.|
|Refer to label instructions||[1 star] Animal research and preliminary human reports suggest that L-tryptophan may help reduce the severity of symptoms.|
Copyright © 2013 Aisle7. All rights reserved. Aisle7.com
The information presented in Aisle7 is for informational purposes only. It is based on scientific studies (human, animal, or in vitro), clinical experience, or traditional usage as cited in each article. The results reported may not necessarily occur in all individuals. Self-treatment is not recommended for life-threatening conditions that require medical treatment under a doctor's care. For many of the conditions discussed, treatment with prescription or over the counter medication is also available. Consult your doctor, practitioner, and/or pharmacist for any health problem and before using any supplements or before making any changes in prescribed medications. Information expires June 2014.