Kira Mei is a certified personal trainer and nutrition coach helping UK adults over 40 get fit, eat well, and build sustainable habits.
The food industry charges a premium for nutrition information that any adult can find in the Aldi or Lidl aisle on a Tuesday morning. Meal prep coaches bill by the hour for advice that amounts to: buy the cheapest protein source, cook it on Sunday, and stop buying things you do not need. The Aldi versus Lidl question is where most UK meal preppers get stuck — both look similar, both are cheap, and neither has a clear winner across every category. The answer, as with most food decisions, depends on what you are buying. Both supermarkets stock excellent meal prep staples; the product by product comparison below will not require a PT or a registered dietitian to interpret.
For UK adults meal prepping on a budget, Aldi and Lidl are broadly comparable in price for the core staples — chicken, rice, eggs, oats, and tinned fish — with differences of 5–15p per item in most categories. Lidl slightly edges Aldi on fresh produce variety; Aldi marginally beats Lidl on shelf-stable items like tinned tuna and oats based on typical UK pricing as tracked by Money Saving Expert. Both are significantly cheaper than Tesco, Asda, or Sainsbury's for equivalent products. The NHS Eatwell Guide underpins the food categories below.
Protein Sources: The Aldi vs Lidl Head-to-Head
For the core meal prep protein sources — chicken breast, tinned fish, eggs, and Greek yoghurt — Aldi and Lidl are within 5–10p of each other in most categories, and both deliver a significantly better cost-per-gram-of-protein than any major UK supermarket.
Nutritionists charge hundreds for macro frameworks built on information any adult can derive from reading two product labels in these stores. The real comparison is price per gram of protein, not sticker price per pack.
Chicken Breast
Aldi typically stocks 600 g chicken breast fillets for approximately £3.29 (approx. 55p per 100 g). Lidl's Birchwood Farm range typically runs 600 g for approximately £3.39 (approx. 57p per 100 g). The difference across a full week of meal prepping two chicken breasts per day (approx. 500 g cooked) is around 50p per week. Both are excellent. If Aldi is closer to you, use Aldi. Both carry similar protein content per 100 g (approximately 22–24 g).
Eggs
One of the few items where Aldi consistently beats Lidl by a meaningful margin. Aldi free-range medium eggs typically retail at £1.39 for six (23p per egg, approx. 0.8p per gram of protein). Lidl free-range medium eggs typically retail at £1.55–£1.65 for six (26–28p per egg). Over a week of meal prepping with 3 eggs per day, the difference is approximately £1.20 per week in favour of Aldi. For a high-volume egg user, shop for eggs at Aldi.
Tinned Fish
Tinned tuna in spring water: Aldi's Ocean Rise range typically retails at 65–69p per 145 g tin. Lidl's Nixe range typically retails at 68–72p per 145 g tin. Tinned mackerel in brine: Aldi typically £0.79, Lidl typically £0.79–£0.85. Effectively equivalent. Both deliver approximately 22–25 g of protein per tin at under £1. BNF protein research consistently identifies oily fish as one of the best protein sources for cost-per-gram and omega-3 content simultaneously.
Greek Yoghurt
Lidl's Milbona 0% Greek yoghurt (500 g tub) typically retails at approximately £1.39. Aldi's Brooklea 0% Greek yoghurt (500 g tub) typically retails at approximately £1.45. Lidl edges this one marginally. Both deliver approximately 10 g of protein per 100 g, making a 200 g serving one of the most cost-effective post-workout protein sources available in the UK.
Carbohydrates and Veg: Where Lidl Takes a Lead
Lidl has a broader and more consistent fresh produce section than Aldi in most UK locations, with more variety in seasonal vegetables and a slightly more reliable supply of the meal prep staples (sweet potatoes, broccoli, spinach) that make up the carbohydrate and micronutrient base of a solid meal prep week.
Oats, Rice, and Potatoes
Aldi's Harvest Morn porridge oats (1 kg): approximately £0.69. Lidl's Harvest oats (1 kg): approximately £0.75–£0.79. Aldi wins on oats. For rice: Aldi long-grain rice (2 kg): approximately £1.19. Lidl long-grain rice (2 kg): approximately £1.19–£1.25. Effectively equivalent. For potatoes: both typically stock 2 kg bags of white potatoes for £1.09–£1.29; Lidl's range is often broader (Maris Piper, King Edward available vs just white potatoes at Aldi).
Fresh Vegetables
Lidl consistently carries a wider range of fresh veg, including more variety in leafy greens, peppers, and seasonal items. Aldi's fresh produce is cheaper on core items — broccoli at approximately £0.49 per head at Aldi vs £0.55–£0.65 at Lidl — but limited on variety. For a standard meal prep week (broccoli, spinach or kale, peppers, courgette), either supermarket works; Lidl offers slightly more variety for the same budget.
Frozen Vegetables for Batch Cooking
Both Aldi and Lidl stock excellent frozen veg ranges at extremely competitive prices. Frozen spinach, broccoli florets, mixed peppers, and edamame beans are all available at both for £0.89–£1.19 per 1 kg bag. Frozen vegetables retain the same nutritional value as fresh and eliminate spoilage waste — a significant budget advantage for meal preppers. MSE guidance on reducing food waste consistently highlights frozen over fresh for budget-conscious households.
The Verdict: How to Use Both Supermarkets
The optimal approach for UK meal preppers is to split the shop: buy eggs, tinned fish, oats, and shelf-stable items at Aldi; buy fresh produce, Greek yoghurt, and dairy at whichever store is closer to you — the savings of cross-shopping are real but only worth the extra trip if both stores are accessible without significant additional cost or time.
If you have access to both Aldi and Lidl within a reasonable distance, a simple split works: eggs, tinned tuna, porridge oats, and tinned tomatoes from Aldi; Greek yoghurt, fresh veg, and dairy from whichever has the current offers. Both regularly run weekly specials on meat and fish that undercut their standard prices significantly — check both apps on Thursday or Friday before your Sunday prep shop.
The Case for Just Picking One
For most UK adults, the time and fuel cost of visiting two discount supermarkets weekly is not justified by 50–80p per week in savings. Pick the one closest to you and shop there consistently. The difference in annual spend between an Aldi-only and Lidl-only meal prep shop is approximately £30–£50 — less than a single PT session. Both beat Tesco, Sainsbury's, and Asda on equivalent items by 20–35%.
Seasonal Specials and Middle Aisles
Both Aldi and Lidl run rotating specials on protein foods: chicken thighs, salmon fillets, beef mince, and Greek yoghurt multipacks all appear at significant discounts periodically. The Aldi and Lidl apps allow you to preview the weekly specials. Buy larger quantities of shelf-stable and freezable items when they appear — chicken thighs and salmon freeze well, and buying three packs at the discount price vs one pack at full price is straightforward savings.
Building a Full Meal Prep Week for Under £30 from Aldi or Lidl
A complete week of high-protein meal prep — five daily meals for 5 days — can be built from Aldi or Lidl for under £30, covering approximately 140 g of protein per day and all macronutrient requirements without supplements or specialist products.
The Shopping List (Aldi Example)
- Chicken breast (600 g × 2 packs): £6.58
- Eggs (12): £2.78
- Tinned tuna (4 × 145 g tins): £2.76
- Greek yoghurt 0% (2 × 500 g tubs): £2.90
- Porridge oats (1 kg): £0.69
- Long-grain rice (2 kg): £1.19
- Broccoli (2 heads): £0.98
- Frozen spinach (1 kg): £0.99
- Tinned tomatoes (4 tins): £1.16
- Sweet potatoes (1 kg bag): £0.99
- Olive oil (500 ml): £2.29
Total: approximately £23.31. This builds 25 meals with approximately 130–140 g of protein per day.
Sunday Prep: 90-Minute System
Batch cook rice (20 min) and roast chicken in the oven (25 min) while prep continues: hard-boil 6 eggs, batch-steam broccoli. Portion into containers. The Sunday 90 minutes produces five days of lunches and dinners, with porridge oats, eggs, and yoghurt covering breakfasts daily. This is the entire macro framework, costed and structured, that a nutritionist would charge £150 to deliver in a "personalised meal plan". It comes from the Aldi aisle and 90 minutes on a Sunday.
FAQ
Is Aldi or Lidl cheaper for meal prep in the UK?
Both are broadly comparable, with Aldi marginally cheaper on eggs and shelf-stable items (oats, tinned fish), and Lidl slightly ahead on fresh produce variety and Greek yoghurt. The annual difference for a consistent meal prepper is approximately £30–£50. Both are 20–35% cheaper than Tesco or Sainsbury's on equivalent products, as tracked by Money Saving Expert. Whichever is closest to you is the correct answer.
What protein foods should I buy at Aldi or Lidl for meal prep?
Chicken breast (approx. £3.29–£3.39 per 600 g), tinned tuna in spring water (approx. 65–72p per tin), eggs (approx. £1.39–£1.65 for six), and Greek yoghurt 0% fat (approx. £1.39–£1.45 per 500 g) at either store. These four sources combined across three meals per day cover 130–150 g of protein for a 75 kg adult. BNF protein guidance identifies protein at every meal as the distribution strategy best supporting muscle maintenance.
How much can I spend on meal prep at Aldi per week?
A complete high-protein meal prep week (all breakfasts, lunches, and dinners for 5 working days) from Aldi costs approximately £23–£28, including protein, carbohydrates, and vegetables for approximately 140 g of protein per day. Scaling for a larger person or adding weekend meals increases costs proportionally; most UK adults can cover the full week's protein for under £15 using Aldi's chicken breast, eggs, tinned fish, and Greek yoghurt.
Can you build muscle eating from Aldi or Lidl on a budget?
Yes. Both stores stock all necessary protein sources to meet the 1.4–2.0 g/kg/day recommended by BNF for adults in strength training programmes. Chicken breast, eggs, tinned fish, Greek yoghurt, and cottage cheese from either store cover the protein requirement without supplements. The NHS Eatwell Guide does not require expensive protein sources for adequate nutrition.
Do Aldi and Lidl have all the meal prep staples?
Yes. Both stock the full range of meal prep staples: chicken, eggs, tinned fish, Greek yoghurt, oats, rice, potatoes, tinned tomatoes, frozen vegetables, and olive oil. Aldi's selection on shelf-stable items is slightly stronger; Lidl's fresh produce range is broader. Kira Mei's Nutrition Blueprint gives you the macro framework, meal prep system, and UK supermarket strategy — one purchase, no subscription, no meal plan to follow forever. Available at kiramei.co.uk.
Disclaimer: This article is for informational purposes only and does not constitute medical, nutritional, or professional fitness advice. Always consult a qualified healthcare professional before making changes to your diet or exercise routine.