When can a baby have cow's milk?
最後更新 2026年8月20日
僅英文
Cow's milk can be used in cooking from around six months, but should not become a baby's main drink before 12 months. Those are two different questions with two different answers, and mixing them up is the most common confusion in this part of weaning.
When can a baby have cow's milk?
In food, from around six months; as a drink, not before 12 months. The NHS states both halves plainly: "For babies, cows' milk does not have the right balance of nutrients so should not be given as a drink before 12 months," but "it's OK to use small amounts in cooking."
Can babies have cow's milk in food before 12 months?
Yes — a cheese sauce, a splash in mashed potato, or milk used to loosen porridge are all "in cooking," not "as a drink," and the NHS treats them as fine from around six months. The distinction is about volume and delivery, not about the ingredient being forbidden: a few tablespoons stirred through a meal is nutritionally different from a bottle or beaker of milk as the main drink of the day.
Why can't cow's milk be a main drink before 1?
Because on its own it doesn't cover what a baby that age needs. The NHS's reasoning is nutritional balance, not an allergy or a hazard: cow's milk drunk in the volumes a baby would take as a main drink displaces breast milk or formula, and it does not have the iron and other nutrients those provide in the right amounts for a baby under one. This is a "not yet the right tool" rule, not a warning about the food itself.
What happens at 12 months?
Cow's milk can become the main drink. Once a baby's diet is more varied and they are getting iron and other nutrients from solid food, whole cow's milk (or goats' or sheep's milk, pasteurised) can move from "used in cooking" to "poured into a cup." Nothing about the milk itself changes overnight at the 12-month mark — what changes is that the rest of the diet is now doing more of the nutritional work milk previously couldn't.
Plant-based drinks follow a separate, later timeline of their own — they are not a substitute for meeting the 12-month cow's-milk threshold early, and rice drinks specifically carry an additional under-5s caution unrelated to this rule.
Is full-fat milk necessary for toddlers?
Yes, as a general default — young children need the energy and vitamins that come with the fat, unlike the low-fat advice given to adults. This is a separate question from the 12-month threshold above, but it comes up in the same conversation often enough to flag: skimmed and semi-skimmed milk are not recommended as the main drink for the first two years for that reason.
If you're weighing up yoghurt or other dairy against this rule, yoghurt follows different guidance and can generally start earlier than cow's milk as a drink — that's a separate question from the one this article answers. Cow's milk is one of several first foods with its own specific threshold rather than a single blanket age — peanut butter and grapes each have a different rule for a different reason.
The short version
A splash of cow's milk in cooking is fine from around six months. As a main drink — in a bottle, beaker or glass — it waits until 12 months, because it doesn't carry what a baby needs at the volumes a main drink implies before then. After 12 months, whole milk is the default; skimmed and semi-skimmed stay off the table for longer.