Facing a shelf full of baby formula can be daunting. Some tins promise comfort, others suggest hungry babies will settle better, and prices vary widely. Yet for most healthy, full-term babies in the UK, the starting point is straightforward: standard first infant milk.
Understanding how to choose baby formula means looking past branding and asking four practical questions: Is it suitable for your baby’s age? Does your baby have a medical need? Can you prepare it safely? And does it fit your budget and routine?
Start with first infant milk
The NHS recommends first infant formula as the usual alternative to breast milk from birth. It can remain your baby’s main milk drink throughout the first year, including after you introduce solid foods at around six months. There is no need to move to follow-on formula.
All infant formulas legally sold in the UK must meet nutritional standards. A premium price does not necessarily mean better nutrition. The best formula for baby is usually a suitable first infant milk that your family can obtain and use reliably, not the one with the most impressive packaging.
Check the label carefully: it should say “first infant milk” or “first infant formula” and “suitable from birth”. Follow-on and growing-up milks may be displayed next to it, but they serve different age groups.
Which types of baby formula should you consider?
Standard cows’ milk-based formula
Most first infant formulas are based on cows’ milk adapted to meet babies’ nutritional needs. This is the usual choice unless a midwife, health visitor or GP advises otherwise. Occasional wind, spit-up or unsettled evenings do not automatically mean a formula is unsuitable.
Goats’ milk formula
Goats’ milk infant formula meets the same nutritional standards as cows’ milk formula. It is not less likely to cause allergies, however, and is unsuitable for babies with cows’ milk protein allergy because the proteins are similar. Ordinary goats’ milk must not replace infant formula in the first year.
Comfort, hungry baby and anti-reflux formula
Comfort formula has partially broken-down proteins, but there is no convincing evidence that it prevents colic or constipation. Hungry baby formula contains more casein protein, yet there is no evidence that it helps babies sleep longer. Ask your health visitor before trying these products.
Anti-reflux formula is thickened and should be used only under medical supervision. Its preparation instructions may differ from standard formula. Persistent reflux or distress after feeding deserves professional assessment rather than a quick change of tin. For more detail, see our guide to comfort and anti-reflux formula.
Hypoallergenic, lactose-free and soya formula
These specialist options are not upgrades for routine feeding. A baby diagnosed with cows’ milk protein allergy may need a prescribed formula with extensively broken-down proteins; comfort formula is not appropriate for this allergy.
Lactose intolerance is uncommon in infants, and lactose-free formula should only be used under medical supervision. Soya formula also requires professional advice. Premature babies and those with medical conditions may need an individual feeding plan.
Powder or ready-to-feed: which fits your day?
This is often the most useful comparison after choosing formula milk. Powdered formula usually costs less per feed, but it is not sterile and requires careful preparation. Ready-to-feed liquid formula is sterile until opened and convenient when travelling, although it generally costs more and must be used promptly after opening.
Consider a family using powdered first infant milk at home and unopened ready-to-feed cartons during a day out. Both are reasonable options when suitable for the baby and handled correctly. You do not have to choose one format for every situation. Our comparison of powdered versus ready-to-feed formula explains the practical trade-offs.
Compare prices and labels sensibly
A useful formula buying guide should look beyond the sticker price. Compare the cost per prepared feed, because tin sizes and preparation quantities vary. Also check local availability: running out of an unfamiliar product late at night is an avoidable complication.
Be cautious of claims about better sleep or advanced ingredients. UK standards mean ordinary first infant formulas meet babies’ nutritional requirements, whatever the brand. Choosing something affordable and readily available can be more valuable than paying for a marketing claim that has no proven benefit.
How can you tell whether a formula suits your baby?
Babies differ in feeding frequency, bowel habits and how much milk they take. A little spit-up or a fussy evening is not, by itself, a reason to switch brands. Look at feeding comfort, wet nappies, growth and your baby’s overall wellbeing over time.
If feeding is regularly difficult, speak to your health visitor about bottle position, teat flow and possible feeding problems. Repeatedly changing formulas may not help. Our first infant milk feeding guide explores what to expect during the early months.
Seek prompt medical advice for poor weight gain, repeated vomiting, blood in the stool or signs of dehydration. Breathing difficulties, swelling of the tongue or throat, or a baby becoming floppy or unresponsive require emergency help.
Remember that safe preparation matters
Even a suitable product can cause problems if prepared incorrectly. NHS advice is to make powdered feeds individually with freshly boiled tap water cooled for no more than 30 minutes, so the water remains at least 70°C when mixed with powder. Use the exact powder-to-water ratio on the pack and cool the feed before offering it.
Sterilise bottles and teats, never add extra powder, water or cereal, and discard formula left after a feed. Do not keep unused made-up formula at room temperature for more than two hours. Some specialist formulas have different preparation instructions, so discuss them with the professional supervising your baby’s care.
Frequently asked questions
Is expensive baby formula better?
No brand is automatically better because it costs more. Standard infant formulas sold in the UK must meet nutritional requirements. Suitability and safe feeding matter more than price.
Do I need follow-on milk after six months?
No. The NHS says switching at six months has no proven benefit. First infant formula can remain your baby’s main milk drink until 12 months.
What if my baby seems uncomfortable after feeds?
Check feeding technique and ask a health visitor or GP about persistent symptoms. Do not assume that fussiness means your baby needs lactose-free or specialist milk.
When can my baby stop having formula?
Formula is generally unnecessary from 12 months if your child eats a varied diet. Pasteurised whole or semi-skimmed cows’ milk can then be offered as a main drink, unless individual medical advice says otherwise.
Keep the decision simple
For most families, choosing baby formula is not about finding a perfect brand. Begin with first infant milk, read the age label, compare realistic costs and pick a format you can prepare safely. Reserve specialist formulas for situations where a healthcare professional recommends them. Your baby’s needs, rather than promises on the tin, should guide the choice.
