A grok conversation on added folic acid

 grok - please calculate how much folic acid someone in the UK will consume if they eat the following foods in a day. Breakfast: a bowl of cereal containing folic acid, with milk, two slices of white toast containing folic acid, and a cup of tea with milk. Mid-morning snack: biscuit made with flour containing folic acid, fresh apple, and a cup of tea with milk. Lunch: Supermarket meal deal consisting of a bacon lettuce and tomato sandwich made with bread containing folic acid, a packet of crisps and a small bottle of orange juice. Mid-afternoon snack: slice of sponge cake made with flour containing folic acid and a cup of tea with milk. Dinner: chicken steak containing flour with folic acid, mashed potato, peas and carrots. Pudding: slice of apple pie (pastry contains folic acid) with custard. Cup of tea with milk.

Rough estimate: about 350–500 µg of added folic acid in a day, depending on exact brands, portion sizes and how much flour is in each product. Most of that comes from fortified non-wholemeal wheat flour plus voluntary cereal fortification. Natural folate from apple, juice, vegetables, milk and tea is separate and is not folic acid.

fsai.ie

Mandatory UK fortification of non-wholemeal wheat flour is 250 µg folic acid per 100 g flour (2.5 µg per gram of flour). The legal deadline is 13 December 2026, but mills have already been adding it in 2025–2026, so many products on sale now contain it.

ukflourmillers.org

Breakdown by meal (typical UK portions)Breakfast

• Fortified cereal (typical bowl 30–45 g): many UK cereals list 100–250+ µg folic acid per 100 g. A 40 g serving of something like Corn Flakes is often ~50–70 µg. Use the pack label for the exact figure.
• Two medium slices of white toast (~40 g each, ~80 g bread): finished white bread is typically ~50–55% flour, so roughly 40–45 g flour → ~100–110 µg.

Mid-morning

• One biscuit made with fortified flour (typical digestive-style ~14–18 g): often 50–60% flour → ~15–25 µg.

Lunch (meal deal)

• BLT sandwich on fortified white bread (another two slices): similar to breakfast toast → ~100–110 µg.
• Crisps: usually potato-based; negligible added folic acid unless the flavouring uses wheat flour.
• Small bottle of orange juice: contains natural folate (~15–25 µg per 100 ml), not added folic acid.

Mid-afternoon

• Slice of sponge cake (~50–70 g): a standard Victoria sponge uses flour as about a quarter of the batter by weight. One slice often contains ~18–25 g flour → ~45–60 µg.

Dinner

• Breaded chicken steak: chicken is typically 55–65% of the product; the coating is a mix of breadcrumbs/flour. One steak often contributes ~12–20 g flour → ~30–50 µg.
• Mash, peas and carrots: no added folic acid.

Pudding

• Slice of apple pie: pastry is high in flour (often ~50% of the pastry weight). A typical slice’s pastry portion can contain ~18–25 g flour → ~45–60 µg.
• Custard: no added folic acid.

Tea with milk throughout the day adds essentially none.Approximate daily totalFlour-containing items together often supply ~300–400 µg. Add the cereal and you reach ~350–500 µg of added folic acid for a fairly typical set of portions.This is a ballpark figure, not a lab analysis. Actual intake varies with:

• Exact cereal (check the nutrition panel; some are much higher than others)
• Slice thickness and loaf size
• How much coating is on the chicken
• How large the cake/pie slices are
• Whether any products used wholemeal, imported, or exempt small-mill flour (those are not required to be fortified)

The adult UK reference nutrient intake for folate is 200 µg/day (400 µg if planning pregnancy or in the first 12 weeks). This day’s menu, plus natural folate from the fruit, juice and vegetables, would put most people well above the basic adult figure from food alone. Women who could become pregnant are still advised to take a 400 µg folic acid supplement as well, because fortification was set at a relatively modest level.

independent.co.uk

For a more precise number, weigh the items or use the folic acid figure printed on the specific cereal and bread packs.