Doctor's Best, Best D-Phenylalanine, 500 mg, 60 Veggie Caps32 Reviews
The 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.
The Shipping Weight includes the product, protective packaging material and the actual shipping box. In addition, the Shipping Weight may be adjusted for the Dimensional Weight (e.g. length, width & height) of a package. It is important to note that certain types of products (e.g. glass containers, liquids, fragile, refrigerated or ice packed) will often require protective packaging material. As such, these products will reflect a higher Shipping Weight compared to the unprotected product.
0.18 lbs (0.08 kg)
- Product Code: DRB-00110
- UPC Code: 753950001107
- Package Quantity: 60 Veggie Caps
- Dimensions: 2.1 x 2.1 x 3.7 in, 0.15 lbs (0.07 kg)
- Important Note:
This is the D-Phenylalanine form, not DL, or L form.
- Volume Discount
This product is already in your Notification List.
Cancel notification request.
This product is now in your Notification List.
This product is already in your Wish List.
View Wish List
This product is now in your Wish List.
Combo Discount: -$2.00
- 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
Adult Use: Take 1 or 2 capsules daily, between meals.
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.
|Serving Size: 1 capsule|
|Servings Per Container: 60 servings|
|Amount per serving||% Daily Value|
|† Daily Value not established.|
iHerb Customer Reviews
Some people have a deficiency of serotonin which causes depression and anxiety, but having an endorphin deficiency can also cause depression and anxiety. This helped restore my endorphin levels to normal, which helped my depression a bit but also helped my anxiety HUGELY, in fact this is about the most effective thing I have found for my anxiety. I have an arm injury which left me with long-term mild pain, it did help with this too, though the pain came back after I stopped taking D-Phenylalanine, I might not have taken it for long enough.
I would have given this 5 stars, except for the fact that at 500mg it gives me this slight but annoying pressure headache and made it a little difficult to focus my eyes. At 250mg, it works best for me when I am going through an emotionally difficult time (DPA increases endorphins in your brain). It makes me much more emotionally at ease and much less bothered by whatever it is that is bothering me. I could see this as very useful for someone to take when they go through a relationship break-up or lose someone close to them. Just make sure you find the minimal dose that works for you. I open the capsule and pour half out then put the capsule back together and swallow it. I take it on an empty stomach and it works best that way. I also read that most studies have found DPA to be effective if taken every day at 100-200mg. So it seems kind of overkill to have these in 500mg capsules, although I'm sure for some people it is fine at that level. I first read about this in Dr. Priscilla Slagle's "The Way Up From Down" and then in Julia Ross's "The Mood Cure". They are both amazing books if you have depression and want a natural program that works even better than prescription medications. I have been following Slagle's basic program for two weeks now and haven't felt this good in years. Sorry for the rant.