Which formula (AU context)

The formula aisle in an Australian supermarket is overwhelming. Fifty products, most of them claiming to be 'closest to breast milk', differentiated by a dozen letters and a dozen buzzwords. This article sorts through what actually matters.

The regulatory floor

Every infant formula sold in Australia must meet strict Food Standards Australia New Zealand (FSANZ) specifications. These set minimum and maximum levels for every nutrient the regulator considers relevant for infant nutrition. In practice: no formula sold legally in Australia is nutritionally deficient for a typical healthy baby. The marketing differences are real but smaller than they appear.

Stages

• Stage 1 — birth to 6 months. Designed for exclusive infant feeding.
• Stage 2 (follow-on) — 6 to 12 months. Slightly higher iron. Used alongside solids.
• Toddler milk (Stage 3, 4) — over 12 months. Not medically necessary for most toddlers. Australian paediatric guidance is that toddler milks offer limited additional benefit over regular cow's milk plus a balanced diet. Many are marketed aggressively; regulatory bodies have raised concerns about this.

Move through stages as your baby ages if you prefer, but staying on Stage 1 longer is also fine. The nutritional differences are modest.

Standard cow's milk formula

Suitable for most babies. Within this category:

• Whey-dominant formulas (labelled 'starter' or 'from birth') — lower casein-to-whey ratio, considered closer to breast milk in protein profile. Most common first-stage choice.
• Casein-dominant formulas — higher casein, marketed for 'hungry babies' or 'night time'. Evidence that they improve sleep is thin.
• A2 milk-based formula — uses only A2 beta-casein protein. Some parents report better tolerance; the research base is modest but growing. Worth trying if your baby seems uncomfortable on standard formula and you don't want to jump to hypoallergenic.

Specialty formulas — by medical indication only

Lactose-free formula

For confirmed lactose intolerance (rare in infants — lactose intolerance is mostly a late-childhood phenomenon) or after severe gastroenteritis. Not for 'lactose sensitivity' self-diagnosed by parents.

Hydrolysed and extensively hydrolysed formulas

Partially hydrolysed ('HA' or 'comfort' formulas) — the protein is broken down somewhat; sometimes used for babies with mild feeding issues or allergy risk. Evidence for allergy prevention is disputed.

Extensively hydrolysed formulas (eHF) — protein broken down enough to be tolerated by most babies with cow's milk protein intolerance (CMPI). Prescription-required (on PBS) for diagnosed CMPI. Not a supermarket choice.

Amino acid formulas

For severe CMPI or multiple food protein intolerances. Prescription-only, on PBS for diagnosed need. Last-resort option when eHF does not work.

Goat's milk formula

Available over the counter in Australia. Nutritionally similar to cow's milk formula. Is not an appropriate substitute for CMPI (goat's milk and cow's milk proteins cross-react in most allergic babies).

Soy formula

Indicated for a small number of specific medical scenarios. Not recommended as a first-line alternative to cow's milk formula for CMPI — a significant proportion of CMPI babies also react to soy. GP-guided decision.

Pre-term and premature infant formulas

Higher-calorie, higher-nutrient formulas for babies born pre-term. Prescribed by paediatricians, used under supervision.

Added ingredients — the marketing layer

Most Australian formulas now include:

• DHA and ARA — long-chain omega fats, included for brain development. Standard across the market now.
• Prebiotics (GOS, FOS) and probiotics — fibres and bacterial cultures intended to support gut flora. Modest benefits in research; not nutritionally essential.
• Nucleotides, lactoferrin, HMOs (human milk oligosaccharides) — various ingredients marketed as closer-to-breast-milk additions. Individual benefits are usually small.

None of these ingredients is bad. None of them is transformational. Formula choice should not be agonised over in the general case.

How to choose, practically

1. 1If you have no specific medical guidance, pick any FSANZ-compliant Stage 1 cow's milk formula. Brand loyalty is not a nutritional decision.
2. 2If there is CMPI, eczema, or existing food allergy, see your GP. The formula is prescription-based.
3. 3If your baby is uncomfortable on one standard formula, it is reasonable to try one other. If two are not tolerated, see a GP — do not keep swapping randomly.
4. 4Do not pay premium prices for marketing claims unless you have tried basic formulas first.
5. 5Do not use imported or unregulated formulas sourced online without FSANZ approval.

Cost

Formula in Australia is expensive — $25–$40 per tin is typical, with a baby using 4–6 tins a month. Over a year this is $1,000–$3,000. For specialty formulas (eHF, amino acid), prescription on PBS reduces cost significantly; discuss with your GP and pharmacist. Social supports exist for families in financial hardship — ask your child health nurse or GP about local options.

Formula feeding is a complete, safe, regulated way to feed your baby. The marketing industry around it is unhelpful — more than half the claims on tins are not supported by compelling evidence. A standard, affordable, FSANZ-compliant Stage 1 formula, offered with paced feeding, nourishes most babies beautifully.