Introducing allergenic foods:
delaying does not protect.
This is the one big rule about starting solids that has genuinely changed in recent years. We give the bodies' current wording, the practice of the first week, and the single boundary the CDC draws.
Important: This page is general information and does not replace medical advice, diagnosis or treatment. If there is a suspected or known food allergy, or severe eczema, the general method here does not apply to you directly; the plan is made with the health professional who sees your baby.
Every statement here comes from the bodies under References: the CDC, the American Academy of Pediatrics, the BZgA, Gesund ins Leben, ANSES and the WHO. No other sources were used.
The rule changed: delaying does not protect
For years, delaying allergenic foods such as egg, peanut and fish was the advice. Today's guidance says the opposite. Avoiding these foods or introducing them later does not protect against allergy.
The CDC's wording is plain: introduce potentially allergenic foods when you introduce other foods. No separate schedule, no separate order, no waiting period is defined.
The practical consequence is this: when you start solids you are not working from two lists. We could not find a body describing a stage of “safe foods first, allergens later”. Allergens are foods like the others, introduced when their turn comes.
What the bodies say
| Body | What it says |
|---|---|
| CDC (United States) | Potentially allergenic foods are introduced alongside other foods. The examples given are eggs, shellfish, nut butters and wheat |
| BZgA — kindergesundheit-info (Germany) | Avoiding or introducing later foods that commonly trigger allergies offers no protection. Complementary feeding is advised not to begin before the start of the fifth month |
| Gesund ins Leben (Germany) | A varied food selection in the first 12 months may have a protective effect against allergic disease |
| ANSES (France) | France does not delay allergen introduction even for a baby at increased risk |
| WHO | Exclusive breastfeeding for six months, then complementary foods alongside continued breastfeeding |
How the first week works
The method the bodies agree on is simple, and it applies to allergens in exactly the same way:
- One single-ingredient food at a time. Not a mixture at first, so that if there is a reaction you know what caused it.
- Wait 3 to 5 days between each new food. That is the CDC's interval. Two new things on the same day leaves both unclear.
- During the day, at home. We are not showing a body that publishes this as a rule, but it follows from wanting to notice a reaction.
- Not while the baby is unwell — the source of any fussiness becomes impossible to separate.
- Cow's milk as a drink is not recommended before 12 months; other dairy such as unsweetened yogurt can be introduced before then (CDC).
The CDC's one exception
There is exactly one place on that CDC page where it says to speak to a professional first, and the sentence is this: if your child has severe eczema or an egg allergy, talk with your child's doctor or nurse about when and how to safely introduce foods with peanuts.
We reproduce it unchanged because the boundary is drawn by the body, not by us. If either of those two applies to your baby, the general method above does not apply to you directly — the plan is made with the health professional who sees your baby.
What Beluna does — and does not do
Beluna does not tell you which food to give or when. It records what you gave: the solid meal with its time and its contents. While you are working through the 3-to-5-day rule, “when did I first try this?” is answered by the record rather than by memory.
You will not find an allergen calendar, a reaction assessment or an “at this age, this food” list here. We do not write anything we cannot show a source for.
Beluna
You should not have to remember what you gave
A solid meal is logged with its time and its contents; when you first tried a new food is there to look back at.
Beluna gives no medical advice, makes no diagnosis and builds no feeding plan.Frequently asked questions
Should I delay allergenic foods?
Today's guidance says no. The CDC says to introduce potentially allergenic foods when you introduce other foods; Germany's BZgA writes that avoiding them or introducing them later offers no protection; France's ANSES does not delay them even for a baby at increased risk.
How long should I wait after a new food?
The CDC says 3 to 5 days, and the reason is to be able to tell which food a reaction came from. Two new things on the same day makes that distinction impossible.
Which foods count as allergenic?
The CDC's page gives eggs, shellfish, nut butters and wheat as examples. That is a list of examples given by the body, not an exhaustive list.
My baby has eczema. What changes?
The CDC names exactly one exception on that page: if your child has severe eczema or an egg allergy, when and how to safely introduce peanut-containing foods is discussed with your doctor or nurse. In that case the general method does not apply to you directly.
Does Beluna keep an allergen calendar?
No. It records the solid meal with its time and contents, so you can look back at when you first tried a food. It suggests no calendar, assesses no reaction and raises no alerts.
References
Everything on this page comes from the public bodies listed below. Every link was opened and its content checked in September 2026. Guidance is revised over time; where this page and a source disagree, the source is right.
- Centers for Disease Control and Prevention (CDC) — “When, What, and How to Introduce Solid Foods”. https://www.cdc.gov/infant-toddler-nutrition/foods-and-drinks/when-what-and-how-to-introduce-solid-foods.html
One single-ingredient food at a time, 3 to 5 days between new foods, introducing allergens alongside other foods, the example allergen list, the cow's milk rule, and the severe eczema / egg allergy exception - American Academy of Pediatrics (AAP) — HealthyChildren.org — “Starting Solid Foods”. https://www.healthychildren.org/English/ages-stages/baby/feeding-nutrition/Pages/Starting-Solid-Foods.aspx
The AAP's own parent-facing page on starting complementary foods - BZgA — kindergesundheit-info.de — “Ernährung des Babys bei erhöhtem Allergierisiko”. https://www.kindergesundheit-info.de/themen/ernaehrung/0-12-monate/allergierisiko/
That avoiding or later introducing commonly allergenic foods offers no protection, and that solids are advised not to start before the fifth month - Gesund ins Leben network — Bundeszentrum für Ernährung (BZfE) — “Allergien vorbeugen — Handlungsempfehlungen”. https://www.gesund-ins-leben.de/fuer-fachkreise/bestens-unterstuetzt-durchs-1-lebensjahr/handlungsempfehlungen/allergien-vorbeugen/
That a varied food selection in the first 12 months may protect against allergic disease - ANSES — French Agency for Food, Environmental and Occupational Health Safety — “Avis de l'Anses relatif à l'actualisation des repères alimentaires pour les enfants de 0 à 3 ans”. https://www.anses.fr/fr/system/files/NUT2017SA0145.pdf
The scientific assessment underpinning the French guidance for 0–3 year olds - World Health Organization (WHO) — “Infant and young child feeding”. https://www.who.int/news-room/fact-sheets/detail/infant-and-young-child-feeding
Exclusive breastfeeding for six months and complementary foods alongside continued breastfeeding