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Doctor's Best, Best D-Phenylalanine, 500 mg, 60 Veggie Caps

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Doctor's Best, Best D-Phenylalanine, 500 mg, 60 Veggie Caps

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Doctor's Best, Best D-Phenylalanine, 500 mg, 60 Veggie Caps

In Stock
  • Expiration Date: 04/2019
  • Shipping Weight:
    0.08 kg
    Switch to Imperial units
  • Product Code: DRB-00110
  • UPC Code: 753950001107
  • Package Quantity: 60 Veggie Caps
  • Dimensions:
    5.3 x 5.3 x 9.4 cm , 0.07 kg
    Switch to Imperial units
  • This is the D-Phenylalanine form, not DL, or L form.

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Save kn64.25 when you purchase these items today for only kn415.66
Product Overview


  • Science-Based Nutrition
  • Dietary Supplement
  • Suitable for Vegetarians

D-phenylalanine is a non-protein amino acid related to the essential amino acid L-phenylalanine. D- and L-phenylalanine are structural mirror images of each other. A small amount of D-phenylalanine may be converted to L-phenylalanine in the body. D-phenylalanine is reported to inhibit an enzyme that degrades enkephalins, which are naturally occurring substances in the body that belong to the class of compounds known as "endorphins".

  • Aids in the relief of minor pain

Suggested Use

Adult Use: Take 1 or 2 capsules daily, between meals.

Other Ingredients

Modified cellulose (vegetarian capsule), cellulose, magnesium stearate (vegetable source).

Contains nothing other than listed ingredients


Caution: Phenylalanine supplements should not be taken by individuals with phenylketonuria (PKU), children, pregnant or lactating women, people with high blood pressure, and anyone taking anti-psychotic medications or MAO inhibitors.

Supplement Facts
Serving Size: 1 capsule
Servings Per Container: 60 servings
  Amount per serving % Daily Value
D-phenylalanine 500 mg
† Daily Value not established.
iHerb Customer Reviews

Not effective

Posted by iHerb Customer on Sep 11, 2017 | Verified Purchase

Does not help in pain or in mood betterment

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Great Product

Posted by iHerb Customer on Apr 26, 2017 | Verified Purchase

This product is very effective and I highly recommend it for pain management.

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pain relief

Posted by iHerb Customer on Mar 07, 2017 | Verified Purchase

This product works great for pain relief from sciatica

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Posted by iHerb Customer on Sep 08, 2016 | Verified Purchase

I suffered from 1 year depression. I was taking 5-htp, with no results. But when I start to took 1 capsule of this in the morning, my depression did disappear in two days. Unbelievable.

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D-Best D-phenyalalnine works

Posted by Gibbly on Jul 02, 2016 | Verified Purchase

Ups the receptors alright, taking two d-best d-phenys night time, one afternoon on empty stomach. Enjoy!

Thanks for your feedback!