Why You Should Use Phenylalanine For Hair Growth

Why You Should Use Phenylalanine For Hair Growth

Why You Should Use Phenylalanine for Hair Growth

Trying to manage thinning hair can be frustrating, and many brands claim to offer solutions yet make hair loss worse with cheap and damaging treatments. Fortunately, Divi’s Scalp Serum uses targeted, active ingredients, including phenylalanine, to promote the best conditions for hair growth.

What Is Phenylalanine?

Phenylalanine is one of nine essential amino acids supporting the production of proteins in the skin, hair and muscles. Since the human body cannot synthesize essential amino acids naturally, you can only receive these nutrients from dietary sources or supplements. Foods containing phenylalanine include nuts, seeds, whole grains and soy products like tofu.

Phenylalanine exists in two molecular forms: L-phenylalanine and D-phenylalanine. The L-form is present in the foods we mentioned above, and the D-form is a synthetic product that chemists produce in a lab.

Both forms facilitate basic biological functions, including the production of molecules such as dopamine. Sufficient levels of phenylalanine in the body also regulate neurological functions, like helping the brain receive information from nerve cells. 

So, how does phenylalanine promote hair health? At a basic level, it supports molecular growth that helps strengthen follicles, repairs scalp damage, and encourages shinier hair. 

Phenylalanine in Hair Products 

As you age, your hair will likely become brittle and lose some of its color. The speed at which graying occurs may seem alarming, but there are some solutions you can use to delay the process. Divi includes phenylalanine in our proprietary Scalp Serum formula to help fortify your color and texture with the ingredient’s protein-building properties.

Woman Applying Divi's Scalp Serum

Phenylalanine acts as a precursor to melanin production, which gives your skin and hair their natural colors. It may also improve the pigment of your scalp if you are dealing with conditions that cause redness or inflammation.

Divi’s Scalp Serum includes this clean ingredient alongside other amino acids to support hair growth. Our phenylalanine-infused formula can nourish hair follicles and improve your scalp’s overall health.

Divi’s products have been tested by dermatologists and are safe for use. In some cases, people who use phenylalanine-infused treatments notice improvements within weeks.

Symptoms You Can Treat with Phenylalanine Products

The first research on phenylalanine was conducted in 1879. Since then, numerous reports have explored the various effects of phenylalanine on the human body. Let’s explore some of these and look at the symptoms you may be able to mitigate with phenylalanine-infused treatments.


Vitiligo is a condition in which skin cells die or stop producing pigment. Vitiligo can occur in patches anywhere on the body. If it affects the scalp, vitiligo may cause the hair to turn gray or white.

Studies determined that topical application of phenylalanine combined with sunlight therapy (natural or artificial) promotes repigmentation in cases of vitiligo. Phenylalanine encourages cells to produce melanin and restore coloration in the scalp.

Pain Relief

Those who struggle with painful scalp conditions like psoriasis or eczema may have trouble finding a soothing solution. Although phenylalanine will not cure either disease, studies suggest that sufficient amounts of this amino acid may help reduce pain.

Phenylalanine-infused products, like Divi’s Scalp Serum, contain additional properties that may moisturize affected areas and alleviate discomfort.

Thyroid Disorders

Research indicates phenylalanine supports the production of tyrosine, a nonessential amino acid that regulates hormones. Someone with low levels of tyrosine may experience thyroid and adrenal gland dysfunction, leading to hair loss. Sufficient levels of phenylalanine promote hormonal health and help protect against certain symptoms of thyroid disorders.

Because of its role in supporting other amino acids, studies suggest phenylalanine may improve stress responses in humans and even symptoms of major depressive disorders. Managing stress is essential to easing the symptoms of many hormonal imbalances, including thyroid issues, which contribute to hair loss.

Protecting Aging Hair Follicles

Amino acids are crucial for prolonging the growth cycle of your hair. Protein production in the scalp strengthens the skin and creates the appearance of thicker shafts. Additionally, a healthier scalp may lead to higher strand counts and wider roots.

An amino acid deficiency may cause hair roots to wither or stop growing altogether. Depending on your genetics, this could happen as early in age as your 20s. Treating your scalp with a phenylalanine-infused product, like Divi’s Scalp Serum, is a great way to promote longer, more youthful-looking hair.

How to Use Divi’s Scalp Serum

Divi’s proprietary Scalp Serum formula provides an easy way to absorb its active ingredients, including phenylalanine, directly into your follicles. You only need ¾ of a dropper of Divi’s Scalp Serum on areas where you notice thinning. Massage the solution deep into your scalp for the best effect.

It may take several minutes for the product to soak into your roots. You should use Divi’s Scalp Serum once a day in the morning or before you go to bed. Let the product work its magic while you go about your day or sleep at night!

Don’t worry if you notice a tingling sensation. Other active ingredients, like peppermint oil, may open your follicles and flush out toxins. 

Although dermatologists determined that Divi’s scalp care products are safe, even for sensitive skin, you should stop using the product if you notice any unusual pain or discomfort. Talk to your doctor if you experience an allergic reaction.

Potential Health Risks of Phenylalanine Use

Phenylalanine is safe to use to support hair growth. However, those with specific conditions like phenylketonuria (PKU) may experience severe allergic reactions after exposure. This metabolic condition can prevent the conversion of phenylalanine into tyrosine, and people who suffer from it should take care to avoid phenylalanine toxicity.

In very rare cases, people can experience mild allergic reactions resulting in rashes or trouble breathing. If you have any concerns, we highly encourage speaking to your doctor before using phenylalanine-infused products.

Divi’s scientists have taken care with the measurements of all ingredients. The quantity of phenylalanine used in Divi’s Scalp Serum is safe and has been tested by dermatologists. 

Studies Supporting Phenylalanine for Hair Growth

Many studies support the use of phenylalanine for hair growth. In a clinical trial on Divi’s Scalp Serum, adult men and women agreed that the phenylalanine-infused product improved their hair quality. Participants also reported that their hair felt much cleaner and less greasy after application.

BioScreen Testing Services, Inc. also completed a product test for our phenylalanine-infused formula to determine whether any participants experienced skin irritation. None of the 55 volunteers reported adverse effects from phenylalanine.

Boosting Your Results with Other Ingredients

Phenylalanine may be a powerful amino acid, but it can only do so much alone. Other ingredients in Divi’s Scalp Serum reinforce the effects of phenylalanine on hair growth, ensuring you get the most out of your treatment. Below are a few examples of other active ingredients included in Divi’s formula to support your hair and scalp health.


Threonine is another essential amino acid that fortifies the hair and scalp. Studies show that threonine creates glycine, a substance necessary for the creation of elastin and collagen. As a result, threonine strengthens the structure of your scalp with anti-aging properties.

Furthermore, threonine helps reduce the symptoms of psoriasis and other dry scalp conditions, supporting the positive effects of phenylalanine for these conditions.

Copper Tripeptide-1

Peptides occur naturally in the human body and support protein-building functions. Specifically, copper tripeptide-1 can reinforce melanin production in the skin and hair.

Copper tripeptide-1 may also alleviate some symptoms of androgenic alopecia. Additionally, evidence suggests this amino acid could support blood vessels and improve oxygen circulation in the scalp.

Phenylalanine works in tandem with copper tripeptide-1, and both ingredients target the root causes of hair health and help sustain your hair’s color.

Green Tea Leaf Oil

Dihydrotestosterone (DHT) is an androgen capable of hastening the development of male-pattern baldness in adults. Green tea leaf extract contains properties that suppress the effects of DHT. 

Furthermore, green tea leaf oil contains epigallocatechin gallate (EGCG), which reinforces the stimulation of hair cells. Sufficient levels of EGCG may also defend against heart disease and some forms of cancer.

Both green tea leaf oil and phenylalanine support hormonal functions in the body, ensuring the best conditions for scalp health and hair growth.

Tea Tree Oil

Eliminating bacteria and other toxins from the scalp is essential for maintaining healthy hair growth. Tea tree oil does just that. Its antioxidant and antibacterial properties effectively fight off toxins and treat scalp inflammation.


Menthol is a vasodilator that comes from mint plants. Its primary function in Divi’s Scalp Serum is to widen blood vessels in the skin and improve oxygen flow to hair follicles. Like tea tree oil, it has antimicrobial qualities that can reduce dryness and inflammation.

Menthol opens up the scalp and helps flush dead skin from hair follicles, opening the way for phenylalanine and other nutrients to absorb into the roots.

Is Phenylalanine Right for You?

Phenylalanine can be effective and safe for treating hair loss as long as you do not have PKU. It can significantly improve your scalp and provide a nurturing environment for your hair with proper application. 

Many adults trust phenylalanine-infused serums to maintain hair quality as they age. As a melanin-enriching amino acid, it can stimulate hair cells and provide a sleeker look for men and women. Additionally, those who experience grey hair early in life may be able to treat their follicles with this ingredient.

Health advocates can also feel safe using phenylalanine-infused products like Divi’s Scalp Serum. This cruelty-free hair treatment contains no harmful chemicals or artificial fragrances that will harm your body over time.

Vegans use this product comfortably, knowing that none of the contents contain animals or their byproducts. We synthesize phenylalanine in a sterile environment and avoid unethical behavior.

Finally, phenylalanine’s follicle-boosting properties help rejuvenate the scalp following a dye job or heat treatment, either at the salon or at home.

Find Solutions with Divi

At Divi, we help a growing number of customers get the hair-growth solutions they need. Our team develops all our products in the United States, offering you a treatment you can trust. Additionally, we take the time to test and study all our active ingredients to ensure their safety and effectiveness.

You can see what our customers say about Divi’s Scalp Serum by reading some of our 9,000 5-star reviews. Customers praise our products for their easy application and fast results. We take the time to help you understand the benefits of using our products.

Learn about how other ingredients prevent hair loss by reading through our blogs. We believe in honesty and communication, so you know what to expect from our formulas. Send us a message if you have questions about our process or how specific ingredients could help you.

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