If you or someone close to you lives with sickle cell disease, you probably know how exhausting the search for relief can feel. Between managing painful crises, keeping up with medications, and navigating daily life, it makes sense that many families also look to nature for additional support.
One plant that keeps coming up in both traditional Nigerian medicine and scientific literature is Terminalia catappa — the Indian Almond tree, known locally in Nigeria as the Tropical Almond or sometimes referenced alongside the “Abere” family of herbal remedies. Its leaves have been used for generations across West Africa, and researchers have started to look more closely at why.
This article looks at what we actually know — from traditional use and from early laboratory research — while being honest about what’s still uncertain.
What Is the Indian Almond Tree?
Terminalia catappa is a large tropical tree that grows widely across Africa, Asia, and the Pacific. You’ve probably walked past one without knowing it — it’s a common shade tree with broad, oval leaves that turn deep red-brown before falling.
In traditional medicine across West Africa, the leaves (particularly the dried, fallen red-brown ones) have long been used to support people with various blood conditions, including Sickle Cell Disease. This isn’t new knowledge — it’s been passed down through communities for a very long time.
What Does the Research Say?
This is where it gets genuinely interesting. Scientists have begun investigating whether there’s a biological basis for what traditional healers have observed for generations — and some early findings are encouraging.
Anti-sickling activity in lab studies
A 2003 Nigerian study tested aqueous and ethanolic extracts of Terminalia catappa leaves on blood samples taken from confirmed sickle cell patients.
The freshly fallen red-brown leaves showed the strongest effect. In laboratory conditions, researchers observed notable reductions in sickling (around 77–78%) within 90 to 180 minutes of incubation. While this is a promising result, it’s important to remember that laboratory findings don’t always translate directly to real-life outcomes in the body.
Antioxidant properties that may matter for sickle cell
More recent research from Niger Delta University explored whether T. catappa leaf extracts could help address oxidative stress, which plays a role in sickle cell disease.
Their findings suggested that, at certain concentrations, the extract may support nitric oxide availability — a factor linked to blood vessel function and circulation. This could be relevant when thinking about vaso-occlusive (blood vessel-blocking) episodes, although more research is needed.
Red blood cell membrane protection
A study published on PubMed found that aqueous extracts of T. catappa helped protect sickle red blood cells against osmotic stress (pressure that can cause cells to burst).
In simpler terms, the cells appeared to remain more stable under stress when exposed to the extract. Again, this was observed in controlled laboratory conditions.
Foetal haemoglobin research
Another PubMed-indexed study reported that a water-based active fraction from T. catappa leaves stimulated foetal haemoglobin (HbF) production in early-stage red blood cell precursors (cells that develop into red blood cells).
Increases of about 6.8 to 9.2-fold were observed in lab settings. Since increasing foetal haemoglobin is a recognised goal in managing sickle cell, this finding is interesting — though still early and not yet confirmed in large human studies.
Recognition in systematic reviews
A 2024 systematic review covering anti-sickling research from 2000 to 2022 identified Terminalia catappa as one of the most frequently reported plant species with anti-sickling properties across multiple studies.
An Important Honest Note
All of this research is promising — but it’s important to say clearly:
Most of these findings come from laboratory (in vitro) studies, not large clinical trials in humans.
The science is still developing, and we don’t yet have enough evidence to confirm how effective or safe this is as a standalone treatment.
Traditional knowledge is valuable and worth exploring — but it should complement, not replace, professional medical care.
How It Is Traditionally Prepared
In West African herbal practice, the dried, fallen red-brown leaves are typically used rather than fresh green leaves. Interestingly, this aligns with laboratory findings suggesting stronger activity in these leaves.
A common traditional preparation involves making a tea from dried powdered leaves in hot water.
Preparation methods vary by community and by practitioner, so if you’re interested in exploring this further, it’s best to speak with both a knowledgeable herbal practitioner and your doctor.
Please Read This Before Trying Anything
Natural doesn’t always mean safe for everyone, and herbal preparations can interact with prescribed medications.
This is especially important if you:
- Are currently on hydroxyurea or other sickle cell medications
- Are pregnant or breastfeeding
- Are considering this for a child
- Have other medical conditions
Always speak with your doctor or haematologist before adding any herbal remedy to your routine. The goal is to support your health — not to complicate it.
The Bottom Line
The Indian Almond leaf (Terminalia catappa) has a long history of traditional use for sickle cell support across West Africa, and early laboratory research offers some possible explanations for why.
That’s worth paying attention to.
At the same time, we’re still in the early stages of understanding its full effects scientifically. The most effective approach remains combining evidence-based medical care with thoughtful, well-informed lifestyle support — always under professional guidance.
If this is something you’re considering, start that conversation with your doctor. You deserve care that works safely and effectively.
This article is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional before starting any herbal remedy.
