Source Naturals L-Tryptophan 500mg, 120 Tablets
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Product Reviews of Source Naturals L-Tryptophan 500mg, 120 Tablets
Product Review: Perfect sleep aid
Summary: 5 Stars
I am a true insomniac who does not want to take prescription sleeping pills due to side effects and dependency issues. So I tried this. Works really well for me. Does not knock me out. Just eases me into a natural sleep. Price at Amazon is half of what I would pay at local health food store.Product Review: This helps me get the sleep I need
Summary: 4 Stars
This doesn't make me sleep like Unisom, but it does help me fall asleep naturally. When I wake in the morning, I don't have that "sleeping pill hangover." I just feel refreshed.Product Review: Works Well for Sleep
Summary: 3 Stars
Milk and banana at bedtime is my mother's remedy for good sleep. It always worked; I have known that since childhood. What I discovered myself is that every time I had a dinner of rice and garbanzo beans or eggs, I slept deeply and soundly. Digging deeper for the reason traced it to tryptophan and carbohydrates as the common ingredients in all these.
Tryptophan works best for sleep in conjunction with a high carbohydrate dinner because carbohydrates increase insulin, which in turn increases the uptake of tryptophan in brain to increase serotonin synthesis, and that is helps melatonin synthesis, which puts you to sleep. Calcium magnifies the effect of tryptophan on sleep by augmenting the conversion of serotonin to melatonin. Milk and dairy products have all these ingredients and work best for sleep. The downside to this approach is high calories and potential weight gain.
A glass of milk (0.08%) and a banana (0.01%) have about 2000 mg of tryptophan, equivalent of four 500 mg tablets. In my experience taking three to four 500 mg tablets works best for sleep. What I found is that supplement increases the allergy symptoms because tryptophan is also involved in histamine synthesis, which mediates allergies. Sometimes I have also had hangover with tryptophan and melatonin supplements but not tryptophan rich food. However, I do not notice allergy symptoms with tryptophan rich food. If you take supplements for few days in a row, the effect wears off; not so with tryptophan rich food.
The big downside to supplements, of course, is the potential impurities that can get in with the supplements. In 1989 a syndrome called Eosinophilia-myalgia syndrome was linked to 2 impurities, EBT & MTCA, in Tryptophan from a Japanese manufacturer. At least 37 people died from that illness. As we all know, Congress & Senate are for sale, and like the Wall Street, Supplement industry has bought a share of the legislature and avoided all regulation.
For me personally, exercise in the evening and listening to audiobooks really put me to sleep and are the best sleeping aids, without any disadvantages. Tryptophan, taken in the form of dairy products (milk) and banana at bed time help. Occasionally I have used tryptophan in pill form, 2-4, 500 mg pills taken with about 1000 mg of calcium work really well.
Update 10/1/2009: There is lot of batch to batch variability in the quality of this product. So far, I have tried 3 different batches and one did not work at all. This indicates poor quality control in this unregulated industry of supplement manufacturing.
Product Review: works fine
Summary: 5 Stars
I prefer the capsules verses these tablets, since I would divide them out into smaller doses for my youngest and his ADHD. Small does throughout the day keep him focused and relaxed in school verses over stimulated and hyper. But this brand works just as well as any other I have tried for nigh time sleep and calming.
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