The starting point is milk protein
Cow’s milk allergy concerns proteins in milk. ASCIA distinguishes it from lactose intolerance, which concerns digestion of the milk sugar lactose. A lactose-free cow’s milk product is therefore not a substitute for someone avoiding cow’s milk protein. Individual diagnosis and dietary advice belong with a qualified clinician. [1, 2]
This article is a reading aid for labels and menus. The existing dairy allergy guide remains the overview. When someone says only ‘dairy-free’ or ‘lactose-free’, ask what was actually removed and what ingredients remain.
Children avoiding cow’s milk need nutritional guidance from their healthcare team, especially if whole food groups are excluded. This article cannot advise on formula, substitutes, baked-milk challenges or reintroduction. [1]
Names that point back to milk
ASCIA’s avoidance guide names casein and caseinates, whey, milk solids, milk powder, curd, buttermilk, ghee, butter oil and many other milk-containing foods or components. The list is a cue to investigate a label; it is not a complete ingredient dictionary. [1]
Whey and casein are milk proteins even when the finished food does not look like milk. Butter, ghee, cream and yogurt are familiar dairy forms to check in sauces, pastries, marinades, desserts and drinks. These ingredient pages explain forms generally; they do not verify any brand.
A product may also use a compound ingredient such as a seasoning, filling or sauce. Read the complete current pack and its allergen declaration. If the source of an unfamiliar ingredient is unclear, ask the maker before relying on it. [3]
Treat ‘lactose-free’ as a different statement
ASCIA says lactose-free milk and formula are unsuitable for people with cow’s milk protein allergy. Lactose intolerance does not cause anaphylaxis, whereas cow’s milk protein allergy can cause serious allergic reactions. That difference matters more than a front-of-pack claim that sounds reassuring. [2]
A label saying ‘lactose-free’ addresses lactose, not the presence of casein or whey. Do not infer that a ‘low lactose’ cheese, lactose-free ice cream or lactose-free milk is suitable for milk allergy. Check the product’s milk declaration and follow your clinician’s specific advice. [1, 2]
Some products marketed as plant alternatives use soy, tree nuts or other allergens. Milk absence alone does not answer another allergy. Check each relevant allergen separately, including the ingredients and any precautionary statement. [3]
Check the market and the meal
Australia and New Zealand require applicable packaged foods to declare milk in plain English when present as an allergen; FSANZ notes that this can make technical terms such as whey or casein easier to recognise. A menu or imported pack may present information differently, so look for the actual ingredient and allergen information for that food. [3]
At a restaurant, ask about the base sauce, marinade, finishing butter, bread and dessert separately. Ask whether bought-in products can be checked from their current packaging and how the food is prepared around milk-containing dishes. The restaurant questions guide can help structure that conversation.
If the kitchen cannot identify an ingredient or preparation method, record the answer as unconfirmed. Keep your personal allergy action plan and any prescribed medicine with you, following your treating team’s instructions. [1]
Sources & references
Source pages checked 18 October 2026. Confirm the exact current recipe and preparation with the venue.