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View this orderFlash Deals are limited time, limited quantity promotions, so act fast! Limited to: 1 unit of 1 flash deal product per order. If you order more than one unit or re-order or order other flash deals, you will pay our regular low price. Flash Deals are ineligible from all other promotions.
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View this orderThe length of time for the expiration date or "best used before" date depends on the type of product, as well as the brand.
Perishable items (such as flax oils or certain probiotics) generally have shorter expiration dates. Although our warehouse is fully air-conditioned, these more fragile items are put in cold storage (freezer or refrigeration unit) for maximum freshness.
Our receiving department does its best to verify and then enter the correct expiration dates for all incoming products. However, discrepancies do occur from time to time. This being said, the exceptionally high turnover at iHerb ensures that our inventory is among the freshest in the industry.
High Potency Serotonin Enhancer
L-Tryptophan is used by the brain as a precursor to serotonin and melatonin, neurotransmitters that are necessary for normal sleep. Adequate sleep is crucial for a healthy immune and nervous system. In addition, changes in the level of serotonin in the brain can impact mood and satiety. Zahler L-Tryptophan is a potent, purified form, which effectively crosses the blood brain barrier.
1 capsule daily, or as directed by your healthcare professional.
Vegetable capsule, magnesium stearate, rice flour.
You may need additional supplements to support a healthy diet, consult your nutritionist for a formula that is right for you.
Keep out of reach of children.
Store tightly in a cool, dry place.
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 ship with alternate packaging, freshness is always guaranteed. We recommend that you read labels, warnings and directions of all products before use and not rely solely on the information provided by iHerb.
| Supplement Facts | ||
| Serving Size: 1 capsule | ||
| Servings Per Container: 60 | ||
| Amount Per Serving | % Daily Value* | |
| L-Tryptophan | 500 mg | ** |
| *Percent Daily value based on a 2,000 calorie diet. **Daily Value nor established. | ||
