Texture-Modified Diets — IDDSI Framework
The International Dysphagia Diet Standardisation Initiative (IDDSI) provides a globally-recognised framework for describing food and drink textures for people with dysphagia. Understanding and correctly implementing IDDSI levels is essential for resident safety and is a key component of nutritional care in care homes.
IDDSI Framework:The IDDSI framework consists of 8 levels (0–7) measured by simple, objective tests. Levels 0–4 describe drinks and fluids, while Levels 4–7 describe food textures. Level 4 spans both categories because extremely thick fluids and pureed foods share similar textural properties. All texture modifications must be prescribed by a Speech and Language Therapist (SLT) or dietitian — never alter a resident's diet texture without professional guidance.
Drinks & Fluids — IDDSI Levels 0–4
Thin
Fluids that flow through a straw or syringe with no resistance — water, tea, coffee, clear soups, and all normal drinks.
Slightly Thick
Slightly thicker than water — flows through a straw but with mild resistance. Similar to the consistency of an anti-reflux formula.
Mildly Thick (Nectar-thick)
Sippable from a cup — pours slowly off a spoon. Leaves a thin coating on the spoon. Can be drunk through a straw (wide bore).
Moderately Thick (Honey-thick)
Must be eaten with a spoon — cannot be drunk through a straw. Falls off a spoon slowly but holds its shape briefly on the plate.
Extremely Thick (Pudding-thick / Puree)
Must be eaten with a spoon — holds its shape on a plate. Does not flow. Cannot be drunk through a straw. Must not be sticky or clumpy.
Food Textures — IDDSI Levels 5–7
Minced & Moist
Soft and moist food that requires minimal chewing. Food should be cohesive and not fall apart. Particles are 2–4mm. Must not be sticky or crumbly.
Soft & Bite-Sized
Soft, tender, and bite-sized (1.5cm x 1.5cm). Requires chewing but not hard or crunchy. Must pass the 'fork pressure test' — food yields when pressed with a fork.
Regular (Easy to Chew / Normal)
Regular, everyday food textures. May be modified for ease of chewing (Easy to Chew: 7-EC) or be fully regular texture (7-Regular). No restrictions on food type.
Texture Modification & Thickener Guide
Practical guidance on preparing food and fluids at each IDDSI level, including thickener usage. Always follow the manufacturer's instructions for any thickening product and ensure consistency matches the prescribed level.
| IDDSI Level | Food Type | Preparation | Thickener Guidance |
|---|---|---|---|
| Level 3 — Moderately Thick (Liquid) | Drinks, soups, sauces | Add thickener to reach honey-like consistency. Use prescribed thickener (e.g., Resource ThickenUp, Nutilis). Test by dripping from a spoon — should fall slowly. | Follow manufacturer instructions for dosage. Typically 1–3 scoops per 100ml depending on desired thickness. Always add thickener to liquid and stir briskly for 20–30 seconds. Allow to stand for 1 minute to reach full consistency. |
| Level 4 — Extremely Thick / Puree (Liquid to Food) | Meals, vegetables, fruits, desserts | Blend food until completely smooth with no lumps. Add liquid or thickener to achieve a pudding-like consistency. Food should hold its shape on a spoon and plate. | For pureed meals, use potato flakes, thickener, or cornflour to achieve the right consistency. Portion before pureeing to ensure correct texture throughout. Do not serve with separate liquid that could alter the texture. |
| Level 5 — Minced & Moist (Food) | Meat, fish, vegetables, cereals | Mince or finely chop food to 2–4mm particles. Food should be moist and cohesive — add thick gravy or sauce to bind. Must pass the 'spoon tilt test' (food slides off spoon with a gentle tilt). | Use commercial thickener in sauces and gravies to bind minced food. Ensure all liquid is absorbed — no separate liquid should pool on the plate. Do not use breadcrumbs or regular flour as a thickener — use prescribed products only. |
| Level 6 — Soft & Bite-Sized (Food) | Cooked vegetables, tender meat, soft fruit | Cut food to 1.5cm × 1.5cm pieces (about the size of a pea). Must pass the 'fork pressure test' — food yields when pressed with a fork. No hard, crunchy, or sticky textures. | Thickener may be needed in sauces served with Level 6 food to moisten and bind. Ensure no thin liquids pool on the plate. Avoid dry foods that could crumble. |
| Level 7 — Easy to Chew | Normal food with modifications | Soft, tender cooked foods. Avoid hard, crunchy, sticky, or chewy textures. No bones, gristle, or tough skins. Foods should require normal chewing but not excessive effort. | No thickener needed for food. If drinks require modification, follow relevant IDDSI drink level (0–4). Ensure the person can manage the food texture safely before leaving them unattended. |
Safety & Compliance Requirements
- 1.Texture modifications must be prescribed by a Speech and Language Therapist (SLT) or dietitian — never change a resident's diet texture without a prescription.
- 2.Always check the IDDSI level on the care plan before serving food or drinks.
- 3.Use IDDSI flow tests (syringe test, fork drip test, fork pressure test) to verify the correct consistency before serving.
- 4.Thickened drinks can change consistency over time — serve promptly and re-mix if they have been standing.
- 5.Never serve thin fluids (Level 0) to a resident prescribed a thickened diet — this is a choking risk.
- 6.Document any texture modification on the care plan and ensure all staff are aware of the resident's prescribed level.
- 7.CQC inspectors will look for evidence that texture modifications are correctly implemented and that staff understand IDDSI levels.
Authoritative Resources
Important Notice:The IDDSI guidance provided by Care Handbook is for reference only and does not replace professional assessment. Texture modifications must only be made on the advice of a Speech and Language Therapist (SLT) or dietitian. Incorrect texture modification can pose a serious choking risk. Always follow your organisation's policies, the resident's care plan, and the IDDSI framework available at iddsi.org.