Is Aldi Mamia first infant formula the same as Aptamil?

Are they the same milk, or just in the same legal class?

They are not the same product. Aptamil First Infant Milk is a Danone brand sold across the big grocers. Mamia First Infant Milk is Aldi's own-label first milk. The tins, scoop sizes, extra ingredients and marketing lines differ. What they share is the legal class: both are first infant formula placed on the UK market.

NHS Best Start in Life states that, by law, all infant formula sold in the UK must meet the same standards, and that this means they are all suitable for a baby's growth and development. NHS Highland, citing First Steps Nutrition Trust, puts the same point more bluntly: all infant formula brands are interchangeable regardless of price differences, because the law requires the same nutrition composition standards.

The NHS line quoted by the Competition and Markets Authority is: it does not matter which brand you choose, they will all meet your baby's nutritional needs, regardless of brand or price. That is a legal-standard statement, not a claim that two tins taste the same or that a switch will suit every baby.

What does the NHS say about brand and first infant milk?

If you are not breastfeeding, NHS Best Start in Life says you should use first infant formula as the main drink until 12 months. There is no need to move to follow-on formula. The older NHS types-of-formula page says first infant formula should always be the first formula you give, unless a midwife, health visitor or GP suggests otherwise, and that research shows switching to follow-on at six months has no benefits.

• Brand: NHS wording is that it does not matter which brand you choose.
• Type: stay on first infant milk (whey-based) through the first year unless a clinician names a different product.
• Hungry, anti-reflux, lactose-free or 'comfort' milks: NHS Highland says to avoid these for a healthy baby unless a health professional has advised them.
• A tin that seems to disagree with your baby: the NHS types-of-formula page says there is no evidence that switching does any good or harm, and to talk to a midwife or health visitor before you change type.

This page is not a Healthy Start or Best Start Foods explainer, and it is not clinical advice. If your baby has a diagnosed cow's milk allergy or another medical need, the product is no longer a like-for-like first-milk swap.

How did the CMA treat Mamia and Aptamil?

The Competition and Markets Authority's February 2025 infant-formula market study treated Danone's Aptamil (and Aptamil Advanced) and Aldi's Mamia as products in the same tightly regulated first-infant-milk market. The final report described own-label as scarce: Mamia was the established supermarket own-label, with Lidl's Lupilu a later entrant. That is a market-structure fact, not a recipe comparison.

The BBC's report of the same study said buying market-leader Aptamil rather than a low-priced brand such as Little Steps would cost about £300 more per year on the CMA's workings, and Aptamil Advanced versus Little Steps about £540. The CMA's own notes keep the headline range at £300–£500. MayTally does not invent a current Mamia or Aptamil sticker price.

Danone told the BBC that although all formulas must meet minimum regulatory requirements, "not all formula milks have the same nutritional benefits". Which? and First Steps Nutrition Trust treat extra marketing ingredients as not proven to make one compliant first milk superior. Read the tin and, if you are unsure, ask the health visitor — this is not a ranking of brands.

What did Which? publish about six-month cost?

Which?'s expert buying advice (page dated 4 December 2025, pricing window in 2024) is the table many deal blogs screenshot behind a paywall. It is a historical average, not a live aisle price. Which? also states that all infant formula sold in the UK is legally required to meet the same standards, so all will meet a baby's nutritional needs irrespective of brand, price or claims about ingredients.

Which? called Mamia the cheapest first infant formula in that snapshot and Aptamil the most expensive of the set — nearly double Mamia's six-month estimate. That is a cost finding. It is not a finding that one tin is clinically better.

When is a switch not a like-for-like first-milk swap?

1. The new tin is follow-on, growing-up or toddler milk — NHS Highland says follow-on marketed from 6–12 months is unnecessary where first infant milk is available, and could be harmful under six months.
2. The new tin is hungry-baby, anti-reflux, lactose-free or a food for special medical purposes and nobody in the clinical team has named that product.
3. You are comparing Aptamil Advanced (or another premium sub-brand) with standard first milk — the CMA priced those lines separately because the sticker is different, not because the legal first-milk class has changed.
4. A midwife, health visitor or GP has already named a specialist formula. Do not treat supermarket own-label as a substitute for that product.

In shortMamia and Aptamil are not the same tin. They are the same legal class of first infant formula. NHS wording is that brand and price do not decide whether a compliant first milk meets nutritional needs. Use CMA and Which? for the cost gap; use your midwife or health visitor if the feed itself is the question.