Can I eat grapes while pregnant?

The verdict

Yes. Grapes are safe to eat at any stage of pregnancy, in any colour, seeded or seedless. They appear on no national avoid list, no limit list, and no be-careful-with list in the UK, United States, Australia or Ireland.

They count towards your 5 A Day. The NHS portion size for fresh fruit is 80g, which for grapes is roughly a handful, or about 15 to 20 depending on size.

Where the worry came from

Two separate claims circulate, and both fall apart for the same reason: they take something studied at supplement doses and apply it to fruit.

The first is resveratrol. This is a compound found in grape skins, particularly red ones, which attracted attention after an animal study in which pregnant monkeys given resveratrol supplements showed changes in fetal pancreatic development. That study used a concentrated supplement at a dose far beyond anything obtainable from eating grapes. It was a study of a supplement, and ShePrep does not cover supplements; it is mentioned here only because it is the origin of a claim that then got attached to fruit.

The quantities are not close. Resveratrol content in grapes is measured in fractions of a milligram per serving, while supplement studies use hundreds of milligrams. Concluding that grapes are risky from that work is the same error as concluding oranges are dangerous because a study used high-dose ascorbic acid.

The second claim is that grapes are heating and cause miscarriage, which appears in some traditional systems of medicine. There is no mechanism behind it and no authority anywhere restricts grapes for that or any other reason.

What actually applies to grapes

The real rule is dull and it is about the outside of the fruit, not the inside.

Grapes grow low, in bunches, close to sprayed foliage, and they are eaten raw with the skin on and usually without any preparation step at all. That combination is unusual. Most produce is either peeled, cooked, or both. Grapes go from bag to mouth.

The NHS instruction is to wash fruit, vegetables and salads to remove all traces of soil, which may contain toxoplasma, a parasite that can cause toxoplasmosis and can harm an unborn baby. Rinsing under running water and separating the bunch so the water reaches between the grapes does that. Soap, detergent and commercial produce washes are not recommended and are not needed.

Grapes that come pre-cut or pre-packed with other things

Whole grapes in a bag are one thing. Grapes as part of a chilled fruit pot, a supermarket cheese-and-fruit box, or a buffet fruit platter are another, and they follow the pre-prepared food rules rather than the grape rules.

The NHS asks that pre-packaged and pre-cut fruit be kept chilled and eaten before the use-by date. FSANZ lists pre-prepared or pre-packaged fruit salads, including those from buffets and salad bars, among higher-risk foods, with freshly prepared salad as the safer alternative. safefood in Ireland lists ready-to-eat foods from salad bars and delicatessens among foods to avoid.

A cheese-and-grape box also inherits the cheese rule. If the cheese in it is a mould-ripened soft cheese, that is the part to think about, not the fruit.

How much is too much

There is no upper limit for grapes in pregnancy from any authority. Two ordinary considerations apply, neither of them a safety rule.

Grapes are sugary for their volume and easy to eat in quantity without noticing, because there is no natural stopping point in a bag. If you are managing gestational diabetes, that is worth knowing, and portioning them out rather than grazing from the bag is the practical fix. The NHS gestational diabetes advice is to eat regular meals and be careful with foods that raise blood sugar quickly, and how grapes affect you specifically is something your monitoring will show.

Grapes are also mildly acidic, and reflux is common in pregnancy, particularly in the third trimester. If they set off heartburn, that is a comfort problem rather than a safety one.

Grape juice is different from grapes. Juice counts as a maximum of one portion of your 5 A Day however much you drink, and the NHS advice is to limit fruit juice to a small glass a day because the sugars are released from the fruit structure and are harder on teeth. Unpasteurised grape juice follows the general unpasteurised juice rule and should be avoided.

If you have already eaten unwashed grapes

This is the most likely thing to have happened, because grapes are the fruit people eat straight from the bag in the supermarket car park.

Almost certainly nothing follows. Toxoplasma infection from produce is uncommon, most people who are infected have no symptoms at all, and the NHS notes that if you have already had a small amount of something that should be avoided, it is unlikely to affect your baby if you did not get ill.

There is no test done on the basis of exposure alone. What matters is how you feel over the following days and weeks: flu-like symptoms, aching muscles, a high temperature or swollen glands are the things to mention to your midwife or GP, and to mention alongside the fact that you are pregnant.

Where guidance differs

Not on grapes themselves, which no country restricts. It differs on how far to push the washing rule for delicate produce.

The UK and Ireland treat washing as sufficient: wash thoroughly and eat. Australia's consumer guidance goes further, stating that delicate foods such as berries, salad greens and leaves are best avoided because they cannot be washed well enough to be sure they are clean. Grapes are firmer than berries and are not named in that advice, but the reasoning behind it is worth knowing if you are in Australia and being cautious.

The other divergence is pre-cut fruit, where Australia advises against it outright while the UK and Ireland allow it with chilled storage and use-by discipline. That applies to a grape in a fruit pot, not to a grape in a bunch.