IDDSI Level 6 Soft and Bite-Sized: Complete Guide

IDDSI Level 6 — Soft and Bite-Sized — is the least restrictive of the modified solid food levels in the IDDSI framework. It is prescribed for people who retain meaningful chewing ability but require food that breaks down with reduced oral effort and poses minimal aspiration risk from fragmented particles. For many people with mild dysphagia, Level 6 represents the last step before returning to a regular diet.

What Defines Level 6?

Piece size. All food pieces must be no larger than 1.5 cm in any dimension. This is approximately the size of a standard sugar cube or the tip of a thumb. Larger pieces must be cut before serving; they cannot be left for the patient to cut or break at the table.

Texture. Food must be soft enough to be broken down with tongue pressure against the palate — without needing to use teeth. The fork pressure test confirms this: when gentle downward pressure is applied to the food with a fork, the food should yield and deform rather than spring back. It should not require a cutting action or significant force.

Moisture. Food should be moist throughout — not surface-wet and dry inside. Dry or crumbly foods that fragment into hard particles are not appropriate at Level 6.

No hard cores, skins, or seeds. Items with tough exteriors (bread crusts, apple skin) or hard centres must be removed or modified.

The Tongue Pressure Test

The practical bedside test for Level 6 is tongue pressure. Place a piece of food on the tongue and press it firmly against the hard palate without using teeth. Level 6 food must break apart under this pressure. If the food resists and requires biting, it is too firm for Level 6 and may be appropriate for Level 7 (Easy-to-Chew) or regular diet instead.

This test can be performed by carers and kitchen staff before serving to confirm compliance, particularly for items prepared at home or in residential care home (RCHE) kitchens.

Who Is Prescribed Level 6?

Level 6 is suitable for people who:

• Have mild chewing impairment but intact or near-intact tongue strength and swallowing function
• Can manage small, soft pieces safely but risk aspiration from larger, harder, or drier food
• Are transitioning upward from Level 5 (Minced and Moist) as oral function improves after stroke, surgery, or illness
• Have mild neurodegenerative disease where full chewing effort causes fatigue mid-meal
• Have denture-related chewing difficulties where adhesion and stability are compromised

It is not appropriate for people who cannot chew at all, who have severely impaired oral phase function, or who aspirate on small soft particles.

HK Foods That Work Naturally at Level 6

Hong Kong’s food culture includes a wide range of dishes that naturally meet Level 6 criteria without extensive modification:

Protein

• Soft silken tofu (嫩豆腐) cut into 1.5 cm cubes: naturally Level 4–6 depending on firmness; silken or soft-set varieties are reliably Level 6
• Steamed fish (清蒸魚): flaked from the fillet in 1–1.5 cm pieces, bones and skin removed — one of the best naturally Level 6 protein options available in HK
• Well-cooked prawn or scallop, cut into small pieces: soft seafood from Chinese cooking is typically Level 6 when not overcooked
• Soft-braised pork belly (清燉五花腩): well-braised until very tender; fat portions may be too gelatinous for some patients — observe carefully
• Steamed egg (蒸蛋): set to a smooth, yielding consistency; naturally Level 5–6

Carbohydrates

• Well-cooked soft rice (軟飯): standard hospital soft rice in the HA system; must be served moist with sauce or gravy, not dry
• Soft noodles (e.g., thin rice noodles / 米粉, flat rice noodles / 河粉): cut into 2–3 cm pieces if served as Level 6
• Soft steamed bread (饅頭) with crusts removed: the interior crumb, moistened with soup or sauce, can meet Level 6
• Plain congee with soft toppings: base congee is Level 3–4; with added Level 6 toppings, the meal as a whole requires care in texture mixing

Vegetables

• Well-cooked Chinese broccoli (芥蘭), stems cut and peeled to remove fibrous exterior
• Braised eggplant (燜茄子): very soft when well-cooked; cut into 1.5 cm pieces
• Soft-cooked pumpkin (南瓜) or sweet potato (番薯): naturally soft when baked or steamed
• Well-braised daikon radish (白蘿蔔): classic soup ingredient, becomes very soft

Foods to avoid at Level 6

• Whole pieces of meat with connective tissue or tendons
• Bread crusts, toast, crackers, chips
• Raw or lightly cooked vegetables
• Whole fruit with skin; fibrous or seedy fruit (pineapple, guava)
• Stringy or chewy noodles (e.g., thick wheat noodles that are al dente)
• Glutinous rice products (sticky and cohesion issues)
• Nuts, seeds, dried fruit

Comparing Level 6 to Levels 5 and 7

Understanding where Level 6 sits in the hierarchy helps carers and kitchen staff grasp why the level matters:

• Level 5 (Minced and Moist): maximum 4 mm particles; must be moist and cohesive; no requirement for any chewing
• Level 6 (Soft and Bite-Sized): maximum 1.5 cm pieces; requires tongue-pressure breakdown but no full chewing
• Level 7 (Regular / Easy-to-Chew): regular-sized pieces; requires functional chewing; modifier optional

The jump from Level 5 to Level 6 is meaningful: the patient is now handling food that requires some oral phase coordination and tongue control. This transition should only happen on the advice of a speech-language therapist after clinical or instrumental reassessment.

Safe Mealtime Practices at Level 6

Even at the least restrictive modified solid level, safe mealtime habits matter:

• Sit fully upright at 90 degrees for all meals and for at least 30 minutes afterwards
• No rushing: Level 6 patients should set their own pace; do not prompt rapid eating
• Manage meal size: smaller, more frequent meals reduce fatigue-driven unsafe swallowing
• Limit distractions: talking, watching television, or using a phone during eating increases aspiration risk
• Check every item on the tray: mixed textures at different IDDSI levels on the same tray are a common cause of Level 6 compliance failure in hospital and RCHE settings

When to Reassess

Contact the speech-language therapy team if the patient shows new coughing during meals, unexplained chest infections, significant weight loss, or increasing difficulty managing Level 6 foods. These signs may indicate a change in swallowing function that requires instrumental reassessment and possible diet level revision.