5 Daily Habits That Cover Most Nutrient Gaps
Meeting Australian NRV targets and physical activity guidelines simultaneously — at minimal cost — is entirely achievable. Five daily habits cover the vast majority of common deficiencies.
The principle: Rather than tracking 17 nutrients individually, these habits act as a system. Do all five daily, add the weekly habits below, and you’ll cover the nutritional gaps that affect the majority of Australians.
The five daily habits
1
2 eggs
Covers: B12, choline, selenium, Vitamin D, and protein. Two eggs provides 12g complete protein, 1.2µg B12 (half the daily RDI), 150mg choline, and 80–100 IU Vitamin D. But the most important reason to make this your first meal component: after an overnight fast, your body is in a catabolic state — breaking down muscle protein for fuel. The leucine threshold to flip this to anabolic is ~3g, requiring 30–40g of quality protein. Two eggs alone (~12g) don’t get you there — pair them with Greek yoghurt or a glass of milk to hit the threshold and stop the overnight breakdown. See the full catabolic cycle explainer.
~$0.60 (pair with yoghurt to hit the threshold)
2
Dairy — yoghurt or 250 mL milk
Covers: calcium and iodine. A 200g serve of yoghurt provides approximately 300mg calcium (30% of adult RDI). Iodine in Australian dairy averages 50–70µg per 250mL — a meaningful contribution to the 150µg daily target. Choose plain, unsweetened yoghurt for the best nutritional value per dollar.
~$0.40–0.70
3
Citrus or capsicum — any Vitamin C source
Covers: Vitamin C (the iron absorption multiplier). Adding Vitamin C to any plant-iron meal can triple iron absorption. Half a capsicum, a squeeze of lemon juice, a small orange, or a handful of frozen broccoli all deliver 40–80mg — well above the 75–90mg RDI. The cheapest option is often a squeeze of lemon on lentils.
~$0.20–0.40
4
30 min brisk walk
Covers: Australian physical activity guidelines, bone loading (weight-bearing exercise), and Vitamin D synthesis. A 30-minute walk with arms and legs exposed in reasonable UV conditions generates 400–1,000 IU of Vitamin D. This is your free Vitamin D supplement. It also meets the minimum daily moderate activity target for adults.
Free
5
A handful of leafy greens
Covers: folate, Vitamin K, magnesium, Vitamin A. A 60g handful of spinach, silverbeet, or kale delivers roughly 130µg folate (30% of the 400µg RDI), 300µg Vitamin K, 50mg magnesium, and significant Vitamin A as beta-carotene. Cook in olive oil to improve absorption of the fat-soluble vitamins.
~$0.20
Weekly habits that cover the rest
🆋
Organ meat once a week — chicken liver works best
One 100g serve of chicken liver covers: B12 for the entire week, your daily Vitamin A target, half your weekly iron target, and significant folate and zinc. Hidden in bolognese or a stir-fry with strong spices, most families don’t detect it. This is the single highest return-on-investment food in Australian supermarkets.
~$1.00–1.50 per serve
🦋
Sardines once a week
Covers: Vitamin D, omega-3 (DHA/EPA), calcium (the bones), and B12. One tin provides approximately 400–500 IU Vitamin D, 1,500mg omega-3, and 350mg calcium — equivalent to a glass of milk. Two tins a week covers most adults’ weekly omega-3 target.
~$1.80 per tin
💪
2 × strength training sessions
Preserves muscle mass, bone density, and insulin sensitivity — the three things that decline fastest with age and inactivity. No gym required: resistance bands, bodyweight exercises, or heavy household tasks all count. Australian guidelines recommend muscle-strengthening activities at least 2 days per week for adults.
Free
🍃
Legumes 3–4 times a week
Lentils, chickpeas, kidney beans, and cannellini beans: plant protein, fibre, magnesium, zinc, folate, and iron. At $1.40–1.80 per 400g tin (roughly 3–4 serves), they’re the cheapest protein source available. Always pair with Vitamin C to maximise iron absorption.
~$0.25–0.50 per serve
What this costs
💰 Weekly budget summary
Single adult meeting all NRV targets and PA guidelines: ~$47–55/week on food.
Family of 4 following this framework: ~$107–125/week.
Gym membership or supplements: not required. Sun, eggs, sardines, liver, lentils, and a park cover the vast majority of needs for most demographics.
For food cost comparisons and the full tier 1/2/3 ranked food list, see the Budget Nutrition Arsenal. For the weekly shopping list with prices, see Smart Shopping.
Sources: NHMRC Australian Nutrient Reference Values (2006, updated 2017) · Department of Health Australian Physical Activity & Sedentary Behaviour Guidelines (2021) · ABS National Nutrition & Physical Activity Survey 2023 · USDA FoodData Central nutrient database