We often talk about hair health in terms of what we apply to our scalp or strands but true transformation starts within. At the core of healthy hair growth, strong nails, glowing skin, and optimal wellbeing are amino acids: the fundamental building blocks of life.
In this article, we break down exactly how amino acids support your hair, what happens if you're deficient, and why supplementing with amino acids is one of the most effective ways to boost your hair's resilience, shine, and growth.
Do Amino Acids Help Grow Hair?
Yes, and in more ways than one. Amino acids are responsible for building proteins like keratin and collagen, which make up the structural foundation of your hair. Without an adequate supply, your body simply cannot produce strong, healthy hair fibres.
Beyond structure, amino acids also help regulate hormones, support blood flow to the scalp, and even contribute to the production of enzymes involved in hair cycling. Key amino acids for hair growth include cysteine, methionine, lysine, and arginine.
In fact, lysine in particular plays a critical role in iron absorption, another essential factor for strong hair and preventing shedding.
What Amino Acid Deficiency Causes Hair Loss?
Hair thinning, shedding, or lack of growth may be a sign that your body isn’t getting enough of the amino acids it needs. A deficiency in essential amino acids, like lysine, methionine or tryptophan, can contribute to hair weakness or loss.
Some signs you might be lacking in amino acids include:
Excessive hair shedding
Weak, brittle strands
Slow hair growth
Increased breakage
Which acid is best for hair growth?
It's also important to consider other nutrient cofactors: amino acids work in synergy with vitamins like biotin, B12, and folate, all of which are included in our Tender Love and Hair Vitamins to support overall health and hair wellness.
When people ask about "which acid is best", they're usually referring to amino acids, not exfoliating or fatty acids. For hair growth, cysteine stands out as one of the most effective — it's a key component of keratin and provides sulphur, which adds strength and rigidity to the hair shaft.
Other important amino acids include:
Methionine – an essential amino acid that helps with collagen and keratin production.
Arginine – improves blood flow to the scalp and stimulates hair follicles.
Lysine – helps absorb iron and zinc, two minerals critical to hair structure.
These are all found in high-quality hair growth supplements like ours, specifically designed to nourish your hair from root to tip.
Nourish Your Hair from Within with Tender Love and Hair Vitamins for healthy hair growth
If you're serious about improving your hair’s strength, growth, and resilience, nutrition is where it all begins. At CENTRED, we’ve formulated our award-winning Tender Love and Hair Supplements to provide your body with the essential building blocks for healthy hair including amino acids and key supportive nutrients.
Every capsule delivers a synergistic blend of:
Essential Amino Acids – including L-Lysine, L-Methionine, and N-Acetyl Cysteine, which help build keratin and support the hair growth cycle.
Biotin, Zinc & Iron – proven nutrients that help maintain normal hair growth and reduce shedding.
Vitamin B Complex – including B5, B6, B12, and more, for energy metabolism and nervous system support.
Seaweed Extract & Selenium – rich in iodine and antioxidants to protect and fortify follicles.
Bamboo Extract – A potent natural source of the mineral silica which plays a vital role in collagen production and the strength and elasticity of our hair strands.
Probiotics (Lactobacillus Reuteri) – for gut balance, helping you better absorb the nutrients that fuel healthy hair.
This comprehensive formula is at the heart of our approach to whole-body wellness and long-term hair recovery, not just quick fixes.
We also offer tailored versions for different life stages:
Pregnancy & Postpartum – with added choline, folate, ginger root extract and probiotics to support mums and growing babies.
Menopause Support – with adaptogens and hormone-supportive nutrients like maca extract, ashwagandha and vitamin D3 to reduce hair loss and rebalance from within.
Is Amino Acid the Same as Keratin?
Not quite, but they are closely linked. Keratin is a fibrous protein that makes up your hair, skin, and nails. Amino acids are the raw materials your body uses to create keratin.
Think of amino acids as bricks, and keratin as the house. Without the bricks, the house simply can’t be built. That’s why amino acid supplementation is so vital if you’re aiming for healthier hair, especially if you’re not getting enough through diet alone.
Our founder Laura experienced severe hair loss triggered by stress, and rebuilding her amino acid and nutrient profile was a key part of her healing journey.
Can Too Many Amino Acids Cause Hair Loss?
In healthy doses, no, amino acids do not cause hair loss. In fact, your body thrives on them. However, like any supplement, balance is key. It's important not to overload your system with synthetic formulas or unbalanced products.
At CENTRED, we prioritise bioavailable, food-state nutrients your body can actually absorb and use effectively. Our formulas are designed with safety and synergy in mind, helping you get what you need, and nothing you don’t.
What Happens If You Take Amino Acids Every Day?
Incorporating amino acids into your daily routine — especially when paired with supportive vitamins and minerals — can lead to noticeable improvements in:
Hair strength and growth rate
Reduced breakage and shedding
Skin hydration and glow
Nail growth and durability
Overall energy, focus and mood
Many of our customers find that daily use of our Tender Love and Hair supplements not only supports hair recovery, but leaves them feeling more energised and balanced overall because you're nourishing your body at a foundational level,boosting skin and nail health too.
Conclusion:
Hair is one of the first places to reflect what’s happening inside. By supporting your body with essential amino acids, you're giving it the tools it needs to grow stronger, healthier hair, while also promoting better skin, nails, immunity, and energy.
Amino acids aren’t just for athletes or bodybuilders. They’re for anyone wanting to glow from the inside out.
Ready to nourish your roots?
Explore our bestselling Tender Love and Hair Vitamins — now with essential amino acids for growth, strength, and shine.
