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Caps Size:
O, Pill Size Guide
500 mg 100 Caps

"i call these my "crabby pills".. lol. i feel good when i take this product. i know i can't make medical claims but if you have mood issues, try it!!" ~product review by pattycats

  • An amino acid supplement for specialized dietary support

  • Plays a key role in neurotransmitter function

  • 500 mg per capsule

Get a nutritional boost with Swanson DL-Phenylalanine (DLPA)! A great source of amino acid precursors for neurotransmitters that help regulate mood and other mental functions, DL-Phenylalanine is an essential amino acid that cannot be made in the body and must be supplied by food.

Product Label

Supplement Facts

Serving Size 1 Capsule

  Amount Per Serving % Daily Value
DL-Phenylalanine 500 mg *

*Daily Value not established.

Other ingredients: Gelatin, magnesium stearate.

Suggested Use: As a dietary supplement, take one capsule one to two times per day with water.

WARNING: Do not take this product if you are pregnant or nursing, have phenylketonuria, or are taking MAOIs, levodopa, or antipsychotic medications. Consult your healthcare provider before use if you take any prescription medications.

Terms and Ingredient Definitions

Swanson Premium DL-Phenylalanine Reviews

Summary of Customer Ratings & Reviews

Customer Ratings & Reviews

DL-Phenylalanine 4.3 5 20 24
DL-Phenylalanine So far, so good. I take this to help ease stress and calm the mind. It does seem to help me a little and I will continue to take it. March 17, 2014
love this! i call these my "crabby pills".. lol. i feel good when i take this product. i know i can't make medical claims but if you have mood issues, try it!! February 14, 2014
Thumbs Up! Peer-reviewed research convinced me this supplement was worth a try. A friend recommended Swanson for quality and value. All I can say is both husband and I are really glad we decided on a trial of Dlpa. We were moving better within days of starting regular use. I can unequivocally recommend this supplement and Swanson! September 23, 2013
not too impressed 1st thing - I'm sure that swanson's version is just as effective as any other dl-phenylalanine at the same dosage. I just didn't get the effects I had hoped for. I felt "fuzzy" while taking it. I've only taken about 1/4 of the bottle because I wanted to finish my current stack, and use this by itself to see if I get better results. August 28, 2013
Headache This product gave me a really bad, and strange, headache. Fortunately Swanson gave me a refund, and I appreciate being able to post a review. August 20, 2013
Great Product Have been happy with this amino acid and with the quality of this product! July 29, 2013
Great product Works well. My mood is 100% better July 12, 2013
Keeps head and spirit happy!! I finally came back to taking this to keep both the head and spirit happy. Pounding 12 miles a day having to keep customers challenges met in plumbing can take a toil on your head and spirits. I took this before and didn't realize how much it really helped till I recognized the head and spirits both were down, a friend recommended I try it again. I am both amazed and pleased how well it works. My friend takes this and buys it here to save more than $20 a bottle over the high priced health food store. I'd love to thank Swanson many times over for their quality, low prices and fast shipping. Try it, you won't be disappointed!! April 11, 2013
If you are struggling with low moods and stress As a person that struggles with low moods and a high stress job I purchased this DL-Phenyalalanine from Swanson's and I started taking 1 capsule (2X a day). One in the morning and one in the afternoon. You won't feel any results overnight, but it will be more gradual. It took about a week before I realized that I didn't feel as stressed as I normally do and felt my over all well being improved. I finally cut back to one capsule a day. Also combine this with one of Swanson's several Rhodolia type supplements as a stack which together seems to amplify the over all well being. December 12, 2012
It seems to work for me It seems to help me to focus and be able to concentrate better. I also been taking huperzine to help with my memory for a month or so. November 21, 2012
Definatly worth a try Being a pretty big sceptic, I have been very suprised to she my overal mood has been improving since i began taking this dlpa stuff,. June 11, 2012
Boost in the morning This amino acid gives me a little boost without the jitters. November 28, 2011
I use it every day A pschological and physical boost. I take two twice a day. February 9, 2011
Mood and Energy Booster I take DL-Phenylalanine to boost my mood and energy. I take it between breakfast and lunch on an empty stomach and it works in 20 minutes. The product is quality as all Swanson products are. August 11, 2010
Not very effective If you search the internet you will find the benefits of both the D and L forms of phenylalanine. While I am usually more than satisfied with Swanson's products, this particular one did not work for me. I've found that Country Life brand with B-6 works much better. I won't reorder this one again. I hope Swanson's will soon carry the other product. July 3, 2010
I feel great I am using this product plus the 5htp at bed time. I seem to have more self control, clarity of thought and I get a great night of sleep!!! February 2, 2010
Protects endorphine levels This essential amino acid helps keep a sunnier mood by slowing the breakdown of endorphins, our natural opiates, in the central nervous system. My husband and I take DLPA (DL-Phenylalanine) daily for a mood brightener and mild appetite suppressant. We're glad to find it in the strength we want at a good price from Swanson Vitamins. November 9, 2009
Great Product This product gives a nice clean energy. The mood lift is definitely there as well. Although, it is more drive and motivation related as opposed to satiation. Very nice product. August 18, 2009
Great mood lifter! I have used this for about 4 years now. It works wonders during the long winter months. Great mood lifter. Also, it has no side effects that I have seen. Which is nice since so many things now a days have negative effects with long term use. Not this one, it works great. March 4, 2009
Sunshine in a bottle Combined with a daily B complex C, it acts like a mood lifter for getting through those long winter nights, or a series of cloudy days. I've used it for years. I'm happy to find a great source at Swanson, that lasts for 3 months. December 26, 2007
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