Indication: All UK adults should consider 10 micrograms (400 IU) daily, especially October-March. Higher doses for deficiency.

Why: UK sunlight insufficient for vitamin D synthesis in winter. Deficiency common, especially in darker skin, housebound, covered skin.

Evidence: Prevents rickets/osteomalacia. May reduce respiratory infections. No proven benefit for CVD, cancer, or COVID-19 prevention.

Dose: 10 micrograms (400 IU) daily for maintenance. 800-2000 IU for deficiency (check levels first).

GP Script: "Vitamin D is one of the few supplements most people in the UK should take, especially in winter. Our sunlight isn't strong enough to make enough vitamin D from October to March."

Indication: Vegans, pernicious anaemia, malabsorption (Crohn's, coeliac, post-gastrectomy), metformin use, PPI use.

Why: B12 only found in animal products. Vegans cannot get adequate B12 from diet alone.

Evidence: Prevents megaloblastic anaemia and neurological damage. Essential for DNA synthesis and nerve function.

Dose: 10-25 micrograms daily for vegans. 1000 micrograms IM every 2-3 months for pernicious anaemia.

GP Script: "If you're vegan, you need to supplement B12 — there's no plant source that provides enough. It's essential for your nerves and blood cells."

Indication: Rarely needed for healthy adults eating varied diet. May benefit: pregnancy (folic acid), elderly with poor intake, restrictive diets.

Evidence: No proven benefit for CVD, cancer, or mortality in well-nourished populations. May fill gaps in deficient diets.

Caution: High-dose multivitamins may be harmful (beta-carotene in smokers, vitamin E). Stick to RDA levels.

GP Script: "If you're eating a varied diet with plenty of vegetables, fruit, and protein, you probably don't need a multivitamin. But if your diet is very restricted, a basic multivitamin won't hurt."

Indication: Convenience for athletes, elderly with poor appetite, patients struggling to meet protein targets from food.

Evidence: Effective for increasing protein intake. No magic properties — just convenient protein source.

Types: Whey (fast-absorbing, complete amino acids), casein (slow-absorbing), plant-based (pea, soy, rice).

Dose: 20-30g protein per serving. Use to supplement food, not replace meals.

GP Script: "Protein powder is just convenient protein — it's not magic. If you're struggling to get enough protein from food, it can help. But whole foods should always come first."

Principle: Supplements should fill a gap, not compensate for a chaotic diet. Whole foods provide fibre, phytonutrients, and food matrix effects that supplements cannot replicate.

Examples:

• Calcium: Dairy, leafy greens, fortified plant milk > calcium tablets
• Iron: Red meat, beans, fortified cereals > iron supplements (unless deficient)
• Omega-3: Oily fish 2x/week > fish oil capsules
• Fibre: Vegetables, whole grains, legumes > fibre supplements

GP Script: "Supplements can't fix a bad diet. Focus on eating real food first — vegetables, fruit, whole grains, protein. Supplements are for filling specific gaps, not replacing meals."

Vitamin D: Prescribe colecalciferol 400-800 IU daily (maintenance) or 20,000 IU weekly for 7 weeks (loading). Check levels if symptoms of deficiency.

B12: Prescribe hydroxocobalamin 1mg IM for pernicious anaemia. Oral cyanocobalamin 50-150 micrograms daily for dietary deficiency.

Folic acid: 400 micrograms daily pre-conception and first 12 weeks pregnancy. 5mg daily for women on antiepileptics or previous NTD.

Iron: Prescribe ferrous sulfate 200mg TDS for iron deficiency anaemia. Check for underlying cause (menorrhagia, GI bleeding).

Avoid: Prescribing multivitamins, vitamin C, vitamin E, or other supplements without clear indication. Not cost-effective.

What Are Probiotics: Live microorganisms that, when administered in adequate amounts, confer a health benefit. Found in yoghurt, kefir, fermented foods, and supplements.

Evidence Is Strain-Specific: Not all probiotics are equal. Benefits depend on specific bacterial strain, dose, and condition being treated. "Probiotic yoghurt" is not a magic cure-all.

Conditions with Evidence:

• IBS: Some strains (Bifidobacterium, Lactobacillus) reduce symptoms. Effect modest. Try for 4 weeks.
• Antibiotic-associated diarrhoea: Saccharomyces boulardii and some Lactobacillus strains reduce risk.
• C. difficile prevention: Weak evidence. Not a substitute for infection control.

Conditions with Weak/No Evidence: Eczema, allergies, weight loss, immune function, mental health (despite marketing claims).

GP Script: "Probiotics may help some people with IBS, but they're not a cure-all. The evidence is strain-specific, so not all probiotic products are the same. Try for 4 weeks — if it doesn't help, stop."

What Are Prebiotics: Non-digestible food components (mostly fibre) that promote growth of beneficial gut bacteria. Found naturally in many plant foods.

Food Sources: Onions, garlic, leeks, asparagus, bananas, oats, apples, flaxseed, legumes, whole grains.

Evidence: Prebiotic-rich diets improve gut microbiome diversity and may improve metabolic health. Whole foods are better than supplements.

Caution: High prebiotic intake can cause bloating and gas, especially in IBS. Increase gradually.

GP Script: "Prebiotics are just fibre that feeds your gut bacteria. You don't need supplements — just eat more vegetables, whole grains, and legumes. Start slowly if you're not used to it."

What Are FODMAPs: Fermentable Oligosaccharides, Disaccharides, Monosaccharides, And Polyols. Short-chain carbohydrates poorly absorbed in small intestine, fermented by gut bacteria, causing gas and bloating.

High FODMAP Foods: Wheat, onions, garlic, legumes, dairy (lactose), apples, pears, stone fruits, artificial sweeteners (sorbitol, mannitol).

Low FODMAP Is a Diagnostic Tool for IBS: Structured 3-phase approach: elimination (4-6 weeks), reintroduction (test each FODMAP group), personalisation (avoid only triggers).

Not a Long-Term Diet: Prolonged restriction harms gut microbiome diversity. Should be supervised by dietitian. Many patients self-restrict unnecessarily after Googling.

Not for General Health: No benefit for non-IBS patients. High FODMAP foods (legumes, whole grains, vegetables) are healthy for most people.

GP Script: "Low FODMAP is a short-term tool to identify IBS triggers, not a permanent diet. Long-term restriction can harm your gut microbiome. You should work with a dietitian to reintroduce foods properly."

Referral: Refer to dietitian for structured low FODMAP guidance if IBS symptoms persist despite first-line management.

What They Are: Plant compounds structurally similar to cholesterol. Found in fortified foods (Benecol, Flora ProActiv spreads, yoghurts, milk).

Mechanism: Compete with cholesterol for absorption in gut, reducing LDL cholesterol by ~10% at effective dose.

Evidence: Modest LDL reduction (0.3-0.4 mmol/L). No proven benefit for CVD outcomes. Not a substitute for statins.

Dose Matters: Need 2g/day for effect. One yoghurt drink (100ml) contains ~2g. Expensive (£3-4/week).

Who Might Benefit: Patients with borderline high cholesterol who decline statins, or as adjunct to statin therapy.

GP Script: "Plant sterol products can lower cholesterol by about 10%, but they're expensive and not as effective as statins. If your cholesterol is high enough to need treatment, a statin is usually better value."

The Term "Superfood" Is Marketing: No scientific definition. Used to sell expensive products (acai, goji berries, spirulina, chia seeds, kale, quinoa).

Reality: These foods are nutrient-dense, but no single food is magic. A varied diet beats a handful of "special" foods.

Examples:

• Blueberries: High in antioxidants. But so are strawberries, blackberries, and raspberries (cheaper).
• Kale: High in vitamins A, C, K. But so are spinach, broccoli, and cabbage (cheaper).
• Quinoa: Complete protein, high fibre. But so are beans, lentils, and oats (cheaper).
• Chia seeds: High in omega-3. But so are flaxseed and walnuts (cheaper).

GP Script: "There's no such thing as a superfood. These foods are healthy, but they're not magic. A varied diet with plenty of vegetables, fruit, whole grains, and protein is what matters — not expensive trendy foods."

Better Choices:

• Tomato-based curries (jalfrezi, rogan josh, madras) over creamy curries (korma, pasanda, tikka masala)
• Tandoori or tikka (grilled) over fried starters (samosas, pakoras, bhajis)
• Plain rice or chapati over pilau rice, naan, or peshwari naan
• Dahl (lentils) as a side — adds protein and fibre
• Avoid: extra ghee, cream, or butter chicken

Portion Control: Share a main, or save half for tomorrow. Restaurant portions are often 2-3 servings.

Better Choices:

• Steamed or stir-fried dishes over deep-fried (sweet and sour, crispy duck, spring rolls)
• Dishes with vegetables (chop suey, chow mein with veg)
• Plain boiled rice over egg fried rice
• Avoid: battered dishes, prawn crackers, extra sauces

Watch Out For: High salt content in sauces. High sugar in sweet and sour sauce.

Better Choices:

• Thin crust over deep pan or stuffed crust
• Vegetable toppings (peppers, mushrooms, tomatoes, spinach)
• Lean protein (chicken, ham) over processed meat (pepperoni, sausage)
• Less cheese (ask for "light cheese")
• Side salad instead of garlic bread or chips

Portion Control: One or two slices, not the whole pizza. Share or save half.

Better Choices:

• Grilled fish over battered fish (if available)
• Smaller portion of chips (kids' portion or share)
• Mushy peas or baked beans as a side (adds fibre)
• Avoid: extra salt, curry sauce, gravy

Reality Check: Traditional fish and chips is ~1200 calories. Occasional treat, not weekly habit.

Better Choices:

• Grilled chicken burger over beef burger or fried chicken
• Single patty over double or triple
• Skip the cheese and bacon
• Side salad instead of fries
• Water or diet drink instead of regular fizzy drink
• Avoid: large meal deals, milkshakes, extra sauces

Watch Out For: "Healthy" options can still be high calorie (e.g., salads with creamy dressing).

What It Is: Holding a stretch for 15-60 seconds (e.g., touching toes, quad stretch).

Evidence: Does NOT reduce injury risk. May temporarily reduce power and strength if done immediately before explosive activities (sprinting, jumping). Better done after exercise or as separate flexibility session.

When It's Useful: Improves flexibility and range of motion over time. Reduces muscle stiffness. May help with chronic tightness (e.g., tight hamstrings, hip flexors).

GP Script: "Static stretching before exercise doesn't prevent injuries, and it might even reduce your power temporarily. Save it for after your workout, or do it as a separate flexibility session."

What It Is: Movement-based warm-up (leg swings, arm circles, walking lunges, high knees, butt kicks).

Evidence: Improves performance by increasing blood flow, muscle temperature, and neural activation. May reduce injury risk by preparing muscles for activity.

How to Do It: 5-10 minutes of gradually increasing intensity. Mimic the movements you'll do in your workout. Start slow, build to moderate intensity.

GP Script: "A dynamic warm-up — moving your joints through their range of motion — is more useful than static stretching before exercise. Think leg swings, arm circles, and walking lunges, not holding stretches."

Evidence: Systematic reviews show stretching (static or dynamic) has minimal effect on injury prevention. Most injuries are due to training errors (too much, too soon), not lack of flexibility.

What Actually Prevents Injury:

• Progressive overload (gradual increase in training load)
• Adequate recovery (rest days, sleep, nutrition)
• Good technique (proper form reduces stress on joints)
• Strength training (stronger muscles protect joints)
• Avoiding sudden spikes in training volume

GP Script: "Stretching won't prevent most injuries. What prevents injuries is building up gradually, recovering properly, and using good technique. Don't skip your warm-up, but don't rely on stretching alone to keep you injury-free."

When It's Useful: If you have chronic tightness (tight hamstrings, hip flexors, shoulders), regular stretching can improve range of motion and reduce discomfort.

How to Do It: Hold each stretch for 15-30 seconds, 2-3 times per muscle group. Do it after exercise or as a separate session (not before intense activity).

Frequency: 2-3 times per week for flexibility maintenance. Daily for significant improvement.

GP Script: "Stretching is useful for improving flexibility and reducing stiffness, especially if you sit a lot or have tight muscles. Just don't expect it to prevent injuries — that's not what the evidence shows."

Ask: "How much physical activity do you do in a typical week?"

Classify:

• Inactive: <30 min/week
• Insufficiently active: 30-149 min/week
• Active: ≥150 min/week

Also ask about: Strength training, balance exercises, sedentary time (sitting/screen time).

Use SMART Goals: Specific, Measurable, Achievable, Relevant, Time-bound.

Examples:

• Inactive patient: "Walk for 10 minutes, 3 times this week."
• Insufficiently active: "Increase walking to 30 minutes, 5 days/week."
• Active but no strength training: "Add 2 strength sessions/week (bodyweight exercises or gym)."

Avoid: Vague goals like "exercise more" or "get fit."

FITT Principle:

• Frequency: How many days per week? (e.g., "5 days/week")
• Intensity: How hard? (e.g., "brisk walking — can talk but not sing")
• Time: How long? (e.g., "30 minutes per session")
• Type: What activity? (e.g., "walking, cycling, swimming, or gym")

Example Prescription: "Walk briskly for 30 minutes, 5 days per week. Start with 10 minutes if needed, and build up gradually."

Common Barriers:

• Time: "I'm too busy." → Suggest short bouts (10 min x 3/day), active commuting, lunchtime walks.
• Cost: "Gym is expensive." → Suggest walking, home workouts, YouTube videos, NHS Couch to 5K app.
• Motivation: "I don't enjoy exercise." → Find activities they enjoy, suggest social activities (group classes, walking groups).
• Pain/injury: "My knees hurt." → Suggest low-impact activities (swimming, cycling), refer to physio if needed.
• Weather: "It's too cold/wet." → Suggest indoor alternatives (home workouts, shopping centre walking).

Schedule Follow-up: 2-4 weeks for inactive patients, 3 months for active patients.

Review: Did they achieve their goal? What barriers did they face? Adjust plan as needed.

Celebrate Progress: Acknowledge any increase in activity, even if they didn't meet the full goal.

Adjust Goals: If they succeeded, increase gradually. If they struggled, reduce and simplify.

What They Are: GP-referred programmes where patients receive supervised exercise sessions at local leisure centres, usually at reduced cost or free.

Who They're For: Patients with chronic conditions (obesity, type 2 diabetes, hypertension, depression, osteoarthritis) who would benefit from structured exercise support.

Evidence: Modest benefit for increasing physical activity in the short term. Long-term adherence is variable. Most effective when combined with behaviour change support.

Availability: Varies by local authority. Check your local council or ICB for availability.

NICE Guidance (PH54, 2014): Recommends ERS only as part of broader physical activity strategy, not as standalone intervention.

NHS Couch to 5K: Free app for beginners. 9-week running programme with audio coaching. Evidence-based, popular, and effective.

Active 10: Free app encouraging 10-minute brisk walks. Tracks activity and provides motivational prompts.

NHS Fitness Studio: Free online exercise videos (strength, cardio, yoga, pilates). Suitable for home workouts.

NHS Better Health: Website with physical activity advice, tools, and resources.

parkrun: Free, weekly, timed 5km runs/walks in parks across the UK. Inclusive, social, and evidence-based for improving physical and mental health.

Walking for Health: Free, volunteer-led walking groups across the UK. Suitable for all fitness levels.

Age UK Exercise Classes: Chair-based exercise, strength and balance classes for older adults.

Local leisure centres: Many offer discounted memberships for patients with chronic conditions or low income.

Cardiac Rehabilitation: Supervised exercise programme for patients post-MI, post-cardiac surgery, or with heart failure. Improves outcomes and reduces mortality.

Pulmonary Rehabilitation: Exercise and education programme for patients with COPD. Improves exercise capacity, reduces breathlessness, and improves quality of life.

Falls Prevention Programmes (Otago, FaME): Strength and balance exercises for older adults at risk of falls. Evidence-based, reduces falls by ~30%.

Cancer Rehabilitation: Exercise programmes for patients during and after cancer treatment. Improves fatigue, function, and quality of life.

Ask: "On a scale of 1-10, how important is it for you to change your diet/exercise?" (Importance)

Ask: "On a scale of 1-10, how confident are you that you could make this change?" (Confidence)

Follow up: "Why did you choose [number] and not a lower number?" (Elicits change talk)

Tailor approach:

• Low importance: Explore pros/cons of change. Don't push.
• High importance, low confidence: Build self-efficacy. Start small. Identify past successes.
• High importance, high confidence: Help them make a specific plan.

Change talk: Patient's own statements about desire, ability, reasons, or need to change. Predicts behaviour change.

Questions to elicit change talk:

• "What would be the benefits of exercising more?"
• "What concerns you most about your current weight?"
• "How would your life be different if you were more active?"
• "What makes you think you might need to change?"

Reflect change talk back: "So you're saying that losing weight would help your knees and give you more energy. That sounds really important to you."

Righting reflex: The urge to fix the problem by giving advice, lecturing, or telling the patient what to do. This often triggers resistance.

Instead: Ask permission before giving advice. "Would it be okay if I shared some information about exercise and weight loss?"

Offer options: "Some people find it helpful to start with short walks. Others prefer joining a gym. What do you think might work for you?"

Respect autonomy: "It's your decision. I'm here to support you whatever you choose."

When patient is ready: "What's one small change you could make this week?"

Make it specific: "Walk for 10 minutes after dinner, 3 times this week" (not "exercise more").

Identify barriers: "What might get in the way of doing this?"

Problem-solve: "How could you overcome that barrier?"

Build confidence: "What makes you think you can do this?"

Follow up: "Let's review how it went in 2 weeks."

Fact: Spot reduction doesn't work. You cannot choose where you lose fat. Fat loss is systemic (whole body), determined by genetics and hormones. Doing 100 sit-ups won't burn belly fat specifically.

GP Script: "You can't target fat loss from specific areas. Where you lose fat is determined by your genetics, not by which exercises you do. Focus on overall calorie deficit and strength training."

Fact: Women have ~10-30x less testosterone than men, making it very difficult to build large muscles. Strength training makes women stronger and leaner, not bulky. "Bulky" bodybuilders train for years with specific nutrition and often use performance-enhancing drugs.

GP Script: "Lifting weights won't make you bulky. Women don't have enough testosterone to build large muscles easily. Strength training will make you stronger, leaner, and healthier."

Fact: Excess calories make you fat, not carbs specifically. Carbs are not inherently fattening. Many healthy populations eat high-carb diets (Japan, Mediterranean). The problem is usually ultra-processed, calorie-dense carbs (biscuits, cakes, sugary drinks), not vegetables, fruit, or whole grains.

GP Script: "Carbs don't make you fat — excess calories do. The problem is usually ultra-processed carbs like biscuits and sugary drinks, not vegetables, fruit, or whole grains."

Fact: Your liver and kidneys detox your body continuously. "Detox" products (teas, juices, supplements) are marketing scams with no scientific basis. If your liver and kidneys are working, you don't need to detox.

GP Script: "Your liver and kidneys detox your body 24/7. You don't need special teas, juices, or supplements. If your liver and kidneys are working, you're already detoxing."

Fact: Total daily calorie intake matters more than meal timing. Eating late doesn't magically cause fat gain. However, late-night eating is often associated with snacking on high-calorie foods (crisps, biscuits, ice cream), which is why it's linked to weight gain in observational studies.

GP Script: "Eating late doesn't make you fat — eating too many calories does. The problem is usually what people eat late at night (snacks, desserts), not the timing itself."

Fact: Muscle and fat are different tissues. Muscle cannot turn into fat. When you stop exercising, you lose muscle (atrophy) and may gain fat (if calorie intake exceeds expenditure), but one doesn't transform into the other.

GP Script: "Muscle doesn't turn into fat. They're different tissues. If you stop exercising, you lose muscle and may gain fat, but one doesn't become the other."

Fact: Fluid needs vary by individual, activity level, climate, and diet. There's no magic number. Thirst is a reliable indicator for most people. Urine colour is a good guide (pale yellow = well hydrated, dark yellow = drink more).

GP Script: "There's no magic number for water intake. Drink when you're thirsty, and check your urine colour — pale yellow is good, dark yellow means drink more."

Fact: Meal frequency doesn't significantly affect metabolism. Total daily calorie intake matters more than how often you eat. Some people do better with frequent small meals, others with fewer larger meals. Neither is superior.

GP Script: "Meal frequency doesn't boost metabolism. Eat in a pattern that helps you control hunger and stick to your calorie target. Some people prefer 3 meals, others prefer 6 small meals. Both are fine."