Nutritionist Warns of High Sugar in Supermarket Overnight Oats
A nutritionist has raised concerns about the sugar content in some pre-packaged overnight oats, with one product containing the equivalent of six teaspoons. While convenient, many options lack sufficient protein to be filling.
Key takeaways
- Many supermarket overnight oats are not as healthy as they seem due to high sugar content and low protein.
- A nutritionist advised that some pre-packaged options contain minimal actual oats and lack sufficient protein to satisfy hunger.
- Sainsbury's Overnight Oats & Fruit Mix was identified as a healthy and good value option with a simple ingredient list.
- Pret's Bircher Muesli was flagged for its high sugar content, equivalent to six teaspoons, despite offering moderate protein.

Pre-packaged overnight oats available in UK supermarkets are being scrutinised by a nutritionist who warns that not all options are as healthy as they appear. Kieran Jenkins, a nutritionist at Supply Life, noted that the 'health halo' around overnight oats can be misleading, as ingredient lists vary significantly.
What Happened
Jenkins highlighted that some supermarket overnight oats contain high levels of added sugar and sweeteners, while others have a low actual oat content. A significant concern is the protein level, with many products offering only five to six grams, which may not provide lasting fullness.
He also differentiated between dry mixes and ready-to-eat pots, noting that dry mixes might appear more economical but require additional ingredients like milk.
Key Facts
- Nutritionist Kieran Jenkins stated that some overnight oats have a 'strong health halo' but little actual oat content.
- He identified protein as a 'biggest weakness' in many pre-packaged options, with some containing only five to six grams per serving.
- Sainsbury's Overnight Oats & Fruit Mix (500g) contains 73% oat flakes, raisins, dates, dried apple, sunflower seeds, and pumpkin seeds, with no obvious added sugar.
- Jenkins recommended preparing Sainsbury' mix with milk or serving it with Greek yoghurt due to its limited protein content.
- The Sainsbury' option was priced at £2.10 for 500g and rated as healthy and good value.
- Pret's Bircher Muesli contains 61% natural yoghurt, apple, oats, honey, pomegranate seeds, pumpkin seeds, golden syrup, pistachios, muscovado sugar, sultanas, and other ingredients.
- Pret's Bircher Muesli was noted to have 35.7 grams of sugar per pot, which Jenkins described as 'very high' for a single breakfast.
- This product provided 14.2 grams of protein and 3.3 grams of fibre.
- Jenkins concluded Pret's offering was moderately healthy but high in sugar and not the best value due to the café premium on basic ingredients.
Background
Overnight oats have become a popular 'grab-and-go' breakfast option in the UK, promising convenience, lasting fullness, and better digestion. However, the variety of formulations means consumers must carefully check ingredients.
Sources reviewed
Project Chintan independently synthesized and analyzed information cross-checked across the sources listed above.
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