Lactose vs. corn syrup — why it matters

Updated 3 months ago

Why carbohydrates matter in baby formula

Carbohydrates make up approximately 40% of the calories in both breast milk and infant formula. They are your baby’s primary source of energy, and the type of carbohydrate used has a direct impact on digestion, blood sugar regulation, gut health and how closely the formula mirrors breast milk.

The two most common carbohydrate sources in infant formula are lactose and corn syrup. They are not equivalent — and understanding the difference helps explain why European organic formula is often preferred by parents who have researched the ingredient lists.

What is lactose?

Lactose is a naturally occurring sugar found in the milk of all mammals — including humans. It is the primary carbohydrate in breast milk, and consists of two sugar molecules: glucose and galactose. Galactose plays a specific role in brain development, making lactose more than just an energy source.

Because lactose is the carbohydrate babies are biologically designed to digest from birth, full-term infants produce the enzyme lactase in the womb specifically to break it down. Lactose also promotes the growth of beneficial gut bacteria and supports the absorption of calcium and other minerals.

What is corn syrup?

Corn syrup is a sweetener derived from corn starch — a highly processed ingredient with no natural presence in breast milk. It consists almost entirely of glucose and has a glycemic index of 100, compared to lactose’s glycemic index of 46. This means corn syrup is metabolised at twice the rate of lactose, causing a more rapid rise in blood sugar.

Corn syrup is commonly used in North American formula as a cheaper alternative to lactose, often in formulas marketed for sensitive or gassy babies. It is important to note that corn syrup solids used in formula are not the same as high-fructose corn syrup — but they are still a highly processed, refined sugar with no nutritional role equivalent to lactose.

What EU regulations say

EU infant formula regulations are clear on this point: for standard cow milk or goat milk formula with intact proteins, lactose must be the primary carbohydrate source. Corn syrup, sucrose, glucose syrup, fructose and rice syrup are all prohibited. Starch and maltodextrin may be added from Stage 2 onwards as supplementary carbohydrates — but never as a replacement for lactose.

The only exception is hypoallergenic formula (HA), where some additional carbohydrate sources are permitted because the hydrolysed proteins can have a bitter taste that requires masking. Even then, EU regulations restrict the proportion of alternative carbohydrates that may be used.

What about starch and maltodextrin?

Starch and maltodextrin are two additional carbohydrates permitted under EU regulations — but only from Stage 2 onwards, when babies are growing faster and need more energy. They are not the same as corn syrup, and are not added to sweeten the formula.

Starch is a complex carbohydrate derived from natural sources such as corn or tapioca. It digests more slowly than lactose and makes the formula more filling — relevant for older babies who are hungrier between feeds. Maltodextrin is a partially hydrolysed starch with a mild taste and is easily digestible.

Whether a formula contains starch or maltodextrin depends on the brand and the stage:

• HiPP Dutch and Kendamil — lactose only across all stages
• HiPP German Stage 1 — contains starch alongside lactose, making it slightly more filling than the Dutch version
• Holle cow milk — Stage 1 contains maltodextrin; Stage 2 and above contain both starch and maltodextrin
• Holle goat milk — Stage 1 is lactose only; Stage 2 and above contain starch
• Nannycare — lactose only across all stages

Parents who prefer the simplest possible ingredient list often choose HiPP Dutch, Kendamil or Nannycare for this reason. If you want to compare carbohydrate sources across all formulas at a glance, the Formula Comparison Chart shows starch and maltodextrin content for every product in our range.

Lactose vs. corn syrup at a glance

• Origin — lactose is naturally found in all mammalian milk; corn syrup is derived from processed corn starch
• Glycemic index — lactose: 46; corn syrup: 100 — corn syrup causes a significantly faster blood sugar response
• Gut health — lactose promotes the growth of beneficial bacteria and supports calcium absorption; corn syrup does not
• Brain development — lactose provides galactose, a sugar linked to brain development; corn syrup contains only glucose
• EU regulation — lactose is the primary carbohydrate in standard EU formula; corn syrup is banned
• Closeness to breast milk — lactose is the primary carbohydrate in breast milk; corn syrup is not found in breast milk

All formulas at My Organic Formula are lactose-based

Every standard formula in our range — HiPP, Holle, Kendamil and Nannycare — uses lactose as the primary carbohydrate source in accordance with EU regulations. You will not find corn syrup, sucrose, glucose syrup or fructose in any formula we carry.

HiPP Comfort, our reduced-lactose formula for babies with colic or mild digestive sensitivity, contains additional carbohydrates alongside reduced lactose — but still uses no corn syrup.