Salt for Babies: How Much Is Too Much?

The short answer

Babies under 12 months should have less than 1 gram of salt a day, and in practice that means adding none at all. The NHS sets the by-age ceilings plainly: under 1 year old, “less than 1g”; ages 1 to 3, “no more than 2g” a day. Milk feeds and ordinary unsalted food already carry what a baby needs, which is why the NHS foods-to-avoid guidance says simply: “Babies should not eat much salt, as it’s not good for their kidneys,” and advises against adding salt to your baby’s food or cooking water.

Why the limit is so low

A baby’s kidneys are still maturing, and they cannot handle salt the way an adult’s do; that is the reason the NHS gives for the under-1 ceiling. The practical consequence is easy to state and easy to follow: no salt in the cooking water, no salt in the purée, no salt at the table, no gravy or stock cube stirred into baby’s portion. Your baby has never tasted salted food, so they are not missing it. Bland to you is not bland to them.

Where the salt actually hides

Almost nobody salts a baby’s food directly. The gram creeps in through foods that were salted before they reached your kitchen: bread, cheese, breakfast cereals, sauces, and processed meats like sausage, ham and bacon. Adult ready meals, takeaway food, and condiments are built for adult palates and adult limits, which makes them the main thing to keep off the tray in year one.

None of this makes those foods forbidden forever, and some carry real value in small amounts; cheese is a good example, which the NHS allows from 6 months in its pasteurized full-fat forms even though cheese carries salt, because food-sized amounts fit within the day. The skill to build is label reading. On US labels, salt appears as sodium: 400mg of sodium is about 1 gram of salt, so a single serving of many adult products can spend most of a baby’s day in one go. If you have practiced spotting sugar on a label with our hidden-sugars guide, this is the same 15-second habit pointed at a different line.

Cooking once for the whole family

The good news: you do not need to run a separate baby kitchen. Cook the family meal without salt, take the baby’s portion out, then season the adults’ plates at the table. Soups, stews, roasted vegetables, pasta and rice dishes all survive this order of operations, and most adults stop noticing within a couple of weeks.

The harder part is often social, not culinary. A grandparent who tastes the baby’s food and declares it flavorless is expressing love in the language they cooked in for decades. It helps to have one calm sentence ready: “The guidance is under 1 gram a day before age one, so we season our plates, not the pot.” Flavor is still welcome at the tray; garlic, herbs, cumin, cinnamon and lemon all belong in baby food. Salt is the one seasoning on a meter.

From 12 months: the meter moves, slowly

After the first birthday the ceiling rises to no more than 2 grams a day, which is still far below adult habits. Family food with light seasoning becomes realistic; a diet built around processed and restaurant food does not. If you are working out how meals and milk fit together across this stretch, our 6-to-12-month feeding rhythm guide maps the transition to three family meals a day.

A note before you go

This is educational guidance drawn from published feeding resources, not medical advice. If your baby has a kidney condition, was born preterm, or you are unsure how a specific food fits, your pediatrician should be your first call; they know your child’s history.

In the Miriel app, the Starting Solids program (Beta) includes a 40+ food library with serving and safe-prep guidance for each age band, prepared without added salt, and the CDC, AAP, WHO and NIAID sources behind each recommendation are tappable in-app. Start with our starting solids hub.

References

NHS. Salt in your diet. NHS Live Well. https://www.nhs.uk/live-well/eat-well/food-types/salt-in-your-diet/
NHS. Foods to avoid giving babies and young children. NHS. https://www.nhs.uk/baby/weaning-and-feeding/foods-to-avoid-giving-babies-and-young-children/