Senna is unusual in that both the leaf and the pod are harvested, both carry sennosides, and both are traded as extract. So “senna extract” without a stated plant part is an incomplete specification.
Senna is unusual among commodity botanicals in that two different plant parts — the leaf and the pod (fruit) — are both harvested, both carry sennosides, and both are traded as extract. For a buyer, “senna extract” without a stated plant part is an incomplete specification. This guide sets out the practical difference and how to decide which to specify.
Same Actives, Different Profiles
Both leaf and pod contain the laxative dianthrone glycosides — sennosides A, B, C and D. The difference is one of profile and consistency: the pod (fruit) is often regarded as a cleaner, more consistent source of sennosides, while the leaf is the traditional material with the longest history of use, including in teas. Because the two fractions differ, an undeclared change in the leaf/pod ratio shifts the material even when the species and percentage look the same.
Leaf Extract
- Traditional material — the classic Tinnevelly senna leaf, long used in teas, infusions and traditional laxative preparations (Swarnapatri in Ayurveda).
- Tea and infusion use — traditional / tea-cut grades are typically leaf.
- Broad availability — the most widely traded senna raw material.
Pod (Fruit) Extract
- Consistent sennoside source — the pod is frequently preferred where a stable, well-defined sennoside profile is wanted.
- Dose-controlled products — suits tablets and capsules where potency needs to be tightly held.
- Pharma-oriented grades — often specified where a pharmacopoeial or high-potency material is required.
| Leaf extract | Pod (fruit) extract | |
|---|---|---|
| Actives | Sennosides A–D | Sennosides A–D |
| Reputation | Traditional, teas & infusions | Consistent, dose-controlled |
| Typical formats | Tea-cut, capsules, traditional | Tablets, capsules, pharma grades |
| Best when you want | Heritage / tea positioning | Tight, repeatable potency |
Specification tip: state the plant part explicitly — leaf, pod, or a defined leaf/pod blend — alongside the sennoside grade and assay method. A blend is fine, provided the ratio is declared and held constant across batches.
Which Should You Specify?
If the end product is a herbal tea or a traditional-positioning laxative, leaf is the natural choice. If it is a dose-controlled tablet or capsule where potency consistency is the priority, pod is often preferred. Either way, decide the plant part before you compare grades — and require the assay method (see UV vs HPLC) so batches are comparable. Leaving the plant part open is also a route to undeclared blends and substitution.
To put this into a full purchasing spec, see the senna buyer's guide; or view the Senna Extract with its leaf and pod grade options.
Choose the Right Senna Plant Part
Leaf · pod · defined blend · sennoside grade · UV or HPLC assay · batch CoA