Is there a different between phenylalanine and l-phenylalanine? Why does the L have to be in front of phenylalanine?

Yes. There are two forms of phenylalanine: D-Phenylalanine and L-Phenylalanine. They are mirror forms of each other - identical except one is 'left-handed' (L-) the other 'right-handed' (D-). (This is L/D dichotomy is true for all amino acids). D-Phenylalanine is synthetic and generally used more for reducing pain, while L-Phenylalanine is the naturally occurring form that is more readily converted into dopamine and norepinephrine and used to help with mood, energy and focus.

How does this compare to Naltrrxone?

Reading the reference to Naltrexone, one has nothing to do with the other. L-Phenylalanine is a brain food supplement.

How does this compare to gaba?

I use both for different reasons. I use GABA when I need to settle my mind down. I have anxiety and gabba really helps that. I take L- Phenelaline (2-100mg) with a B6 and that specifically helps the fact that I can’t swallow without food getting stuck. I do that in the morning and evening where as GABA you can take when ever and it seems to work within 20 minutes. I find that the GABA-effects work for about 3-4 hours then I may need to take another one (750mg).

Is this product equivalent of Phentermine

We do not have any information on pharmaceuticals. L-Phenylalanine is an essential amino acid that is necessary for the synthesis of proteins. Because L-Phenylalanine can be readily converted into the amino acid tyrosine, which forms part of the structure of the neurotransmittters dopamine and norepinephrine, it is important for the maintenance of a healthy nervous system.

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

NOW Foods Supplements, L-Phenylalanine 500 mg, Nervous System Support*, Amino Acid, 120 Veg Capsules

NOW Foods Supplements, L-Phenylalanine 500 mg, Nervous System Support*, Amino Acid, 120 Veg Capsules

Product ID: 1424773

Details

Brand
NOW Foods
Diet Type
Gluten Free
Flavor
Unflavored
Item Form
Capsule
Item Weight
0.1 kg
Item dimensions L x W x H
2.5 x 2.5 x

🌱100% vegan, soy & gluten free

💊500 mg pure L-Phenylalanine per capsule

🧠Supports dopamine & norepinephrine synthesis

¥4866

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Japan.

Secure transaction

Description

🧬 Elevate your mind, naturally — the essential boost your nervous system craves!

CLEAN CONSCIOUS - Vegan, non-GMO, soy-free, nut-free, and gluten-free—perfect for mindful wellness routines.
PURE POTENT FORMULA - 500 mg free-form L-Phenylalanine capsules with no fillers, delivering maximum bioavailability.
HERITAGE YOU CAN TRUST - Crafted by a family-owned company since 1968, blending tradition with modern science.
POWER YOUR NERVOUS SYSTEM - Essential amino acid fueling neurotransmitter production for mental clarity and focus.
TRUSTED QUALITY ASSURANCE - GMP-certified manufacturing ensures potency, purity, and safety you can rely on.

NOW Foods L-Phenylalanine 500 mg delivers a pure, free-form essential amino acid that supports healthy neurotransmitter synthesis, including dopamine and norepinephrine, crucial for nervous system function. Packaged in vegan capsules free from common allergens and produced under strict GMP-certified standards by a trusted family-owned brand since 1968.

Specifications

ASIN	B000JCN2MW
ASIN	B000JCN2MW
Age Range Description	Adult
Allergen Information	Dairy Free, Egg Free, Gluten Free, Nut Free, Soy Free
Best Sellers Rank	#32,389 in Health & Household ( See Top 100 in Health & Household ) #515 in Amino Acid Nutritional Supplements #1,259 in Mineral Supplements #2,116 in Sales & Deals
Brand Name	NOW Foods
Color	White
Container Type	Bottle
Customer Reviews	4.4 4.4 out of 5 stars (2,239)
Date First Available	June 26, 2005
Department	Health and Beauty>Health and Wellness
Diet Type	Gluten Free, Vegan
Dosage Form	500
Flavor	Unflavored
Item Dimensions	2.5 x 2.5 x 4.44 inches
Item Form	Capsule
Item Weight	0.1 kg
Item model number	0132
Manufacturer	NOW Sports - Nutrition and Wellness
Manufacturer	NOW Sports - Nutrition and Wellness
Manufacturer Part Number	P8251
Material Features	Vegan
Material Type Free	egg free,gmo free,soy free,wheat free,gluten free
Model Name	upplements, L-Phenylalanine 500 mg, Nervous System Support*, Amino Acid, 120 Veg Capsules
Model Number	0132
Number of Items	1
Primary Supplement Type	L-Phenylalanine
Product Benefits	Stress Relief
Product Dimensions	2.5 x 2.5 x 4.44 inches; 3.53 ounces
Special Ingredients	Amino Acid
Specific Uses For Product	Amino Acid
Total Servings Per Container	120
UPC	733739001320
Unit Count	120 Count

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Abdullah B.

Great price for an authentic product. Fast international shipping too!

3 weeks ago

Suresh K.

Very impressed with the quality and fast delivery. Will shop here again.

4 days ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.

¥4866

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Japan.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Khalid Z.

Great experience from order to delivery. Highly recommended!

1 week ago

Ayesha M.

The product exactly matches the description. Very satisfied with my purchase.

5 days ago

View all Trustpilot reviews