Nutritional Supplement Drinks for Older Adults: NHS Guidance and Evidence

Nutritional supplement drinks for older adults are a specific medical category — distinct from general health supplements. Understanding when they are clinically indicated, what the NHS provides, and how to access them prevents both under-use (in genuine malnutrition) and unnecessary expense (purchasing commercially when NHS prescription is appropriate).

The Problem: Malnutrition in Older Adults

Malnutrition in older adults is common and underdiagnosed. NICE and BAPEN (British Association for Parenteral and Enteral Nutrition) data:

• Approximately 1 in 10 older adults in the community is malnourished or at risk
• Approximately 30–42% of older adults admitted to hospital are malnourished at admission
• 40% of older adults in care homes are malnourished or at risk

Consequences of malnutrition in older adults: Impaired immune function (increased infection risk), slower wound healing, reduced muscle strength (fall risk), depression, increased hospital admission rates, and increased mortality.

NICE CG32 (Nutrition support for adults, 2006, updated 2023): All healthcare settings should use a validated malnutrition screening tool for older adults. In the community, GPs and practice nurses should screen:

• At first GP registration
• At any unplanned hospital admission
• On changes in clinical condition that may affect nutritional intake

MUST: The Malnutrition Universal Screening Tool

MUST is the NICE-recommended community screening tool, consisting of three scored components:

1. BMI score: BMI >20: 0 points; 18.5–20: 1 point; <18.5: 2 points
2. Unplanned weight loss score: <5% in 3–6 months: 0; 5–10%: 1; >10%: 2
3. Acute disease effect score: Add 2 if acutely ill and no nutritional intake likely for >5 days

Total score:

• 0 = Low risk (routine clinical care)
• 1 = Medium risk (observe; food-first approach)
• ≥2 = High risk (refer to dietitian; nutritional support indicated)

MUST can be completed in under 5 minutes and is available free from BAPEN (www.bapen.org.uk). It is the standard tool used by GPs, community dietitians, and care homes.

NHS Oral Nutritional Supplements (ONS)

ONS are energy- and nutrient-dense drinks or semi-solid products prescribed when food-first approaches (food fortification, increased meal frequency) have failed or are insufficient.

NHS prescribing criteria (ACBS — Advisory Committee on Borderline Substances): ONS are prescribable on NHS prescription for:

• Disease-related malnutrition
• Short bowel syndrome
• Intractable malabsorption
• Pre-operative preparation of malnourished patients
• Dysphagia (swallowing difficulties)
• Inflammatory bowel disease
• Following total gastrectomy
• Other specified disease states

The key point: Routine use for "general nutrition" or "healthy ageing" without disease-related malnutrition is not eligible for NHS prescription. A GP or community dietitian assessment confirms eligibility.

Commonly prescribed NHS ONS:

These provide approximately 200–300 kcal and 8–18g protein per serving. NICE recommends these are used as supplements to meals (between meals or after meals), not as meal replacements, to avoid displacing food intake.

Evidence for ONS in Older Adults

Milne et al. (2009, Cochrane Review, 62 RCTs, n=10,187): Protein and energy supplementation in malnourished older adults significantly:

• Reduced mortality risk (RR 0.86 — 14% relative risk reduction)
• Reduced complication rates post-illness/surgery
• Improved weight and grip strength

The evidence base for ONS in documented malnutrition is robust. The benefits are specifically in people with documented malnutrition or high MUST scores — not in well-nourished older adults as a general "health boost."

Food-First Approach (Before ONS)

NICE CG32 recommends exhausting food-first strategies before prescribing ONS:

Food fortification: Adding calorie- and nutrient-dense ingredients to existing foods:

• Full-fat milk instead of semi-skimmed (+65 kcal/200ml)
• Butter, cheese, or cream added to mashed potato, soup, porridge (+100–200 kcal/serving)
• Dried milk powder added to drinks (fortified milk: 300ml semi-skimmed + 2 tbsp skimmed milk powder = +60 kcal, +6g protein)
• Full-fat Greek yoghurt instead of low-fat (+40 kcal per pot)

Meal fortification: Smaller, more frequent meals; nourishing snacks; addressing dental problems that make eating uncomfortable; reducing social isolation around mealtimes.

When food-first is insufficient: If weight is still declining despite food-first interventions, MUST score remains ≥2, or there are swallowing difficulties, a GP referral for dietitian assessment and ONS prescription is appropriate.

Who Qualifies for NHS ONS Prescription

A GP can prescribe ONS on the NHS when:

• MUST score ≥2 (high risk) confirmed
• Food-first approach has been attempted and failed
• A specific disease indication is present (see ACBS list above)

Referral route: GP → community dietitian for assessment and recommendation → GP prescription if appropriate.

Cost if not NHS-eligible: OTC supplement drinks (Ensure, Complan, Meritene) cost approximately £1–3 per serving. For someone needing 2 supplements/day, this is £60–180/month — significant. NHS prescription route (free for eligible older adults or those with specified conditions) should be pursued before purchasing commercially.

Vitamin D: Specifically Recommended for All Older Adults

Separate from ONS, SACN (2016) recommends 10 mcg (400 IU) vitamin D/day for all UK adults aged 65 and over — year-round, not just winter. Vitamin D deficiency is very common in this age group and contributes to:

• Bone loss (osteoporosis, fracture risk)
• Muscle weakness (fall risk)
• Immune dysfunction

NHS England provides free vitamin D supplements to care home residents. Adults not in care homes should purchase 10 mcg vitamin D supplements (approximately £2–4/month) unless their GP identifies an alternative source or contraindication.

Disclaimer: This article is for informational and educational purposes only. NHS ONS eligibility requires clinical assessment by a GP or dietitian. Do not substitute commercial supplements for medical assessment of malnutrition.