Can a centella (gotu kola) supplement help hair loss from a poor diet? What the evidence says

We often associate hair loss with stress, hormones, or age, but few consider the everyday gaps in nutrition that silently weaken the roots. If your meals have been rushed, unbalanced, or full of processed foods lately, your hair might be the first part of your body to notice. Hair follicles are sensitive structures that rely on a steady supply of nutrients to remain active.

A deficiency in key vitamins, minerals, and amino acids can push follicles into a resting phase, causing strands to fall out more easily. So it is a fair question whether a plant known in traditional medicine for wound healing and skin renewal has anything to offer hair — and what the published evidence actually shows.

So, what is Centella asiatica and why is it suddenly in hair supplements?

Centella asiatica, also known as gotu kola, is a small herbaceous plant native to Asia. The name "brahmi" usually refers to a different herb, Bacopa monnieri, so check the Latin name when buying. Traditionally used in both Ayurvedic and Chinese medicine for its skin-healing, cognitive, and anti-inflammatory properties, Centella has now entered the spotlight as a potential ally for hair health.

What makes Centella interesting to supplement makers is that laboratory studies report effects on blood circulation and collagen synthesis. Blood carries the nutrients hair needs, and collagen contributes to the strength and elasticity of the skin of the scalp.

Recent laboratory studies have started to examine these traditional claims. They are cell and animal work, not human hair-loss trials, so what follows is a mechanism people propose — not a demonstrated result in people.

How could Centella work for hair loss?

Researchers describe several possible mechanisms. First, Centella extracts may improve microcirculation, which would mean more blood flow to the scalp and a better supply of oxygen and nutrients to follicles.

Second, the plant contains compounds such as asiaticoside and madecassoside, which show anti-inflammatory activity in laboratory models; the proposal is that this could counter chronic inflammation that impairs hair growth cycles. Third, Centella extracts promote collagen synthesis in skin models. Lastly, laboratory work reports antioxidant activity, which some authors link to protection against oxidative stress.

One laboratory study is closest to hair specifically: Choi and colleagues (2017) reported that a titrated extract of Centella asiatica increased the hair-inductive property of human dermal papilla cells grown as three-dimensional spheroids, through inhibition of STAT signalling. That is a cell-culture result. There is no published randomised human trial showing that an oral Centella supplement regrows hair or stops shedding, so none of these mechanisms should be read as an established effect in people.

Can a supplement really compensate for poor diet?

When it comes to medical conditions like androgenetic alopecia or alopecia areata, diet may play an indirect role, but how large that role is has not been well measured. These forms of hair loss are deeply influenced by hormonal factors, especially the activity of dihydrotestosterone (DHT) in the case of androgenetic alopecia, and by autoimmune reactions in the case of alopecia areata.

While a poor diet doesn’t directly cause these types of alopecia, nutritional imbalances can exacerbate the underlying mechanisms or hinder the effectiveness of treatments. For example, it has been proposed that low intake of nutrients such as zinc, essential fatty acids and antioxidants could worsen inflammatory responses or hormonal sensitivity at the hair follicle, but this has not been shown in trials.

Supplement makers position Centella-based products as complementary support in these scenarios, on the strength of the laboratory findings above. That claim has not been tested in a human hair-loss trial. What is clear is that such products are not substitutes for medical treatments that target DHT directly, such as finasteride, or tested treatments such as topical minoxidil, and they are not expected to reverse autoimmune mechanisms.

Ultimately, no supplement can compensate entirely for poor nutrition. Hair follicles are highly metabolically active and depend on a continuous supply of building blocks like amino acids, vitamins, and trace minerals to function properly. In cases of alopecia with a hormonal or autoimmune basis, a nutrient-rich diet becomes even more important—not because it will cure the condition, but because it can support the body’s overall resilience and optimize the response to treatment.

It’s important to clarify that no supplement—Centella-based or otherwise—can fully compensate for a consistently poor diet.

User Experiences

Several community posts on Tressless reference Centella asiatica in the context of hair loss, but direct user experiences with centella-based supplements for reversing shedding due to poor nutrition are limited — in fact, none were found. Where centella appears, it is in topical combinations in user regimens, particularly in discussions about inflammation, scalp health, and wound healing.

One of the few relevant mentions comes from a user discussing a difficult case of post-transplant complications. In a thread titled "Huge holes on donor area of scalp is this even normal?" the user reported serious damage to the donor area following a hair transplant. In their routine to manage scalp recovery, they included La Roche-Posay Cicaplast Baume B5, a product that contains Centella asiatica. Other users in the thread described the product as soothing for irritated or healing skin. Those are personal reports, not measured outcomes, and the thread is about scalp recovery rather than supplements.

Another mention of Centella asiatica occurred in a thread discussing exosomes. One user noted an interest in exosomes derived from Centella asiatica, drawing a comparison between these and traditional DHT blockers like finasteride. However, the conversation leaned toward skepticism, particularly due to the lack of stability and established evidence with such new treatments. The post suggested curiosity and hopefulness but lacked any detailed results or follow-ups on centella-based exosome treatments.

Overall, community members reference Centella asiatica as part of broader multi-treatment strategies, and no reports were found from users who took a centella-based oral supplement specifically to counteract hair shedding from poor diet.

What to look for in a Centella supplement

If you are considering trying a Centella-based product, look for those that clearly list the concentration of active compounds like asiaticoside or madecassoside.

Choose supplements that provide transparency about dosage and manufacturing practices, and whenever possible, consult with a healthcare provider—especially if you have underlying medical conditions or take medication. Published case reports describe liver injury in people taking oral gotu kola: three women developed hepatitis with jaundice after 20 to 60 days of Centella asiatica, and in one the liver injury came back when she took the herb again (Jorge & Jorge, Revista Española de Enfermedades Digestivas 2005). Avoid oral centella if you have liver disease, are pregnant or breastfeeding, or take medicines that affect the liver, unless a doctor agrees. Herbal supplements are not reviewed for safety or efficacy the way medicines are before they go on sale. That is a reason to raise an oral supplement with a doctor or pharmacist first, particularly alongside other medication.

Widely sold Centella powders and capsules tend to market traditional uses and general benefits for brain function, mood, and skin. However, they rarely provide detailed information about the standardization of active compounds, and none that we are aware of carry clinical testing for hair-related outcomes.

These products often emphasize their “natural,” “organic,” or “vegan” qualities but lack transparency about concentrations of asiaticoside or madecassoside. If choosing a powdered form, be mindful of the preparation instructions, dosage guidance, and labeling. Look for options that indicate whether they are intended for oral or topical use and whether the product comes from a reputable manufacturer with third-party testing.

Hair health is complex, and on the evidence available Centella is a laboratory-stage ingredient rather than a treatment for hair loss.

Is your hair falling because your diet is off, or is it trying to tell you something deeper about your stress, hormones, or environment? A supplement sits at the edges of that question; nutrition, medical diagnosis, and, where indicated, treatment tested in clinical trials sit at the centre of it.

References

Choi, Y. M., An, S., Lee, J., & Lee, J. H. (2017). Titrated extract of Centella asiatica increases hair inductive property through inhibition of STAT signaling pathway in three-dimensional spheroid cultured human dermal papilla cells. Bioscience, Biotechnology, and Biochemistry, 81(12), 2323–2329. https://pubmed.ncbi.nlm.nih.gov/29032741/

Jorge, O. A., & Jorge, A. D. (2005). Hepatotoxicity associated with the ingestion of Centella asiatica. Revista Española de Enfermedades Digestivas, 97(2), 115–124. https://pubmed.ncbi.nlm.nih.gov/15801887/

Shukla, A., Rasik, A. M., & Dhawan, B. N. (1999). Asiaticoside-induced elevation of antioxidant levels in healing wounds. Phytotherapy Research, 13(1), 50–54. https://pubmed.ncbi.nlm.nih.gov/10189951/

Tressless. (2023, December 21). Huge holes on donor area of scalp is this even normal? Reddit. https://reddit.com/r/tressless/comments/18nvl4b/huge_holes_on_donor_area_of_scalp_is_this_even/

Tressless. (2025, January 22). Exosomes 2 months before and after. Reddit. https://reddit.com/r/tressless/comments/1i7bgzj/exosomes_2_months_before_and_after/