Glycine for Hair Loss: Benefits, Side Effects, Before & After
BY TRYBELLO
Aug 6, 2025

Key Takeaways
- Glycine is a non-essential amino acid that supports hair growth by stimulating collagen production and strengthening hair follicles.
- Research shows glycine helps combat hair loss by supporting keratin formation, reducing inflammation, and protecting against oxidative stress.
- Multiple application methods work best with glycine. Combining topical treatments with dietary sources and supplements provides comprehensive hair support.
- Trybello's Hair Helper Spray combines science-backed ingredients like biotin, caffeine, and castor oil that work synergistically with your body's natural processes, offering a convenient alternative to complex glycine regimens.
What is Glycine?
Glycine is one of the simplest amino acids in the human body, yet it plays incredibly complex and vital roles in numerous bodily functions. As a non-essential amino acid, your body can produce glycine naturally, though additional amounts can be obtained through diet or supplements. This remarkable compound serves as a critical building block for proteins throughout your body, including those essential for hair structure.
Without adequate glycine, your body struggles to produce the structural proteins that give hair its strength and resilience. This amino acid also contributes to the production of glutathione, a powerful antioxidant that protects hair follicles from damaging free radicals.
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Glycine Hair Benefits
Hair-Building Amino Acid
Glycine's true power lies in its ability to serve as a fundamental building block for the proteins that form your hair strands. Hair is primarily composed of a protein called keratin, and glycine is one of the essential amino acids required for keratin synthesis.
Without sufficient glycine, your body simply cannot produce the strong, resilient keratin needed for healthy hair growth. That’s why individuals with glycine deficiencies often experience brittle, thinning hair that breaks easily.
Collagen Connection
Collagen, which makes up about one-third of all protein in the human body, relies heavily on glycine for its formation and stability. In fact, every third amino acid in collagen's structure is glycine, making it absolutely essential for collagen production.
When it comes to your hair, collagen provides crucial support to the dermis layer of your scalp, which houses the hair follicles. A strong dermal layer enriched with collagen creates the optimal environment for hair follicles to thrive and produce healthy hair strands.
As we age, our natural collagen production declines, which partly explains age-related hair thinning and loss. By supporting collagen synthesis through glycine supplementation, you're effectively reinforcing the foundational structures that support vibrant hair growth.
DHT Blocking Potential
One of the most promising aspects of glycine for those suffering from pattern hair loss is its potential interaction with dihydrotestosterone (DHT). This potent hormone is the primary culprit behind androgenetic alopecia, the most common form of hair loss.
While glycine doesn't directly block DHT like some pharmaceutical treatments, glycine helps strengthen the hair follicle's resistance to DHT by improving cellular health and promoting robust protein structures within the follicle itself.
Additionally, by supporting the production of glutathione, glycine helps neutralize the inflammatory response triggered by DHT, potentially preserving the follicle's ability to produce healthy hair.
Scientific Evidence

The benefits of glycine for hair health are backed by growing scientific evidence.
Clinical Studies
Several clinical studies have explored glycine's impact on hair health with encouraging results. One notable study found glycine to have similar effect as finasteride in treating hair loss. The researchers attributed these improvements to glycine's role in blocking DHTproduction and its protective effects on hair follicles.
Before & After Results
Many individuals who incorporate glycine into their hair care regimen report noticeable improvements within 2–3 months of consistent use. The most commonly observed changes include reduced shedding, increased hair diameter, improved shine, and greater overall density. These results tend to become more pronounced with continued use, with individuals reporting significant visible improvements by the six-month mark.
Using Glycine Effectively

Maximizing glycine's hair-boosting benefits requires a strategic approach that considers both internal and external applications.
Topical Applications
Applying glycine directly to your scalp allows this beneficial amino acid to penetrate directly to the hair follicles where it's needed most. Topical glycine treatments come in various forms, including serums, shampoos, conditioners, and leave-in treatments.
For maximum effectiveness, look for products that combine glycine with complementary ingredients like biotin, panthenol, and niacinamide, which can enhance absorption and amplify results.
Dietary Sources
Boosting your glycine intake through diet is a natural way to support hair health from the inside out. Glycine-rich foods include bone broth, gelatin, meat (especially the skin and gristle), fish, dairy products, beans, and spinach.
Including these foods in your regular diet provides your body with the raw materials needed to produce the proteins essential for healthy hair growth.
Supplement Options
For those seeking more concentrated glycine support, supplements offer a convenient solution. Glycine supplements typically come in powder or capsule form, with recommended dosages ranging from 3-5 grams daily.
The powder form allows for flexible dosing and can be easily mixed into smoothies, tea, or water. When selecting a glycine supplement, look for products that are free from fillers and artificial additives to ensure you're getting the purest form possible.
Potential Side Effects

While glycine is generally well-tolerated, be aware that it has potential side effects, particularly when taking higher doses.
Skin Reactions
Some individuals may experience mild scalp irritation when using topical glycine products, particularly those with sensitive skin. These reactions typically manifest as temporary redness, itching, or tingling.
To minimize this risk, always perform a patch test before applying any new glycine-containing product to your entire scalp. Start with a small area behind your ear and wait 24 hours to check for any adverse reactions.
Supplement Cautions
When taken orally, glycine supplements rarely cause significant side effects at recommended dosages. However, some users report mild digestive discomfort, nausea, or drowsiness, particularly when taking higher doses.
As with any supplement, it's wise to consult with a healthcare provider before beginning glycine supplementation, especially if you have existing health conditions or take medications. Individuals with liver or kidney disease should exercise particular caution, as these organs play key roles in amino acid metabolism.
Trybello's Perspective: Advancing Beyond Glycine for Complete Hair Wellness

At Trybello, we've taken the scientific principles behind glycine's effectiveness and gave them a boost through our Bello Hair Helper Spray.
Trybello Hair Helper Spray features a synergistic blend of clinically-proven ingredients including biotin, which has been extensively studied for strengthening hair structure; caffeine, which stimulates follicles at the cellular level; and castor oil, renowned for improving scalp circulation.
The spray also contains rice ferment filtrate, which adds additional amino acids and vitamins that complement glycine's effects, while argan oil and ginger extract provide antioxidant protection and anti-inflammatory benefits. The application couldn't be simpler: just spray 1–2 pumps directly onto your scalp, massage for optimal absorption, and leave for 30 minutes or overnight to let these powerful ingredients work their magic.
The beauty of our approach lies in its simplicity and scientific backing. Rather than going through the complexities of glycine supplementation, dietary modifications, and DIY topical preparations, our customers receive a professionally-formulated solution that delivers consistent results.
With over 100,000 satisfied customers experiencing visible improvements in hair thickness, reduced shedding, and enhanced overall hair health, we've proven that the right combination of science-backed ingredients can transform your hair care routine from complicated to effortless. And it’s backed by our 120-day growth guarantee, so if it doesn’t work for you, you’ll get your money back.
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