Greek yogurt vs regular yogurt is mainly a comparison of how the yogurt is made—and what that process does to the nutrients in each spoonful. Straining removes some liquid whey, concentrating the yogurt. That often means more protein per 100 g (3.5 oz), but calcium and lactose can also be lower. “Greek-style” products may be strained or thickened another way, so compare the nutrition panel and ingredients rather than relying on the name.
Greek Yogurt vs Regular Yogurt: What Straining Changes
Regular yogurt is fermented milk that has not been concentrated by straining. Greek yogurt is typically strained after fermentation; removing whey leaves a thicker product with more protein per equal weight. The increase is common, not guaranteed: recipes differ, and some Greek-style products use added milk proteins or thickeners to create a dense texture.
Straining can also remove some lactose and calcium along with the whey. Fermentation affects lactose too, but Greek yogurt is not automatically lactose-free. Calcium is not concentrated in the same way as protein, so a thicker, higher-protein yogurt does not necessarily provide more calcium. Check the amount per 100 g or per comparable serving; serving sizes can differ between tubs.
“Greek-style” is a useful clue to texture, not a reliable description of one manufacturing method in every market. If you want to know whether a product was strained, look for that information on the pack and scan the ingredients for added milk proteins or thickeners. The ingredient list can clarify how it was made, while the nutrition panel tells you what the finished product contains.
Compare Protein, Calcium, Lactose And Sugars
For a fair comparison, start with plain products and compare them at the same weight. Then check protein and calcium directly. A strained yogurt will often win on protein, but brands and recipes vary enough that the front label cannot tell you the exact difference.
For lactose, the label may not give a value. Straining can reduce it, but the amount left depends on the product. If you are managing lactose intolerance, don’t treat “Greek” as a lactose-free claim. For more context on choosing foods, see this guide to foods that may be easier to tolerate with lactose intolerance. Persistent or concerning symptoms are worth discussing with a clinician.
Plain yogurt contains naturally occurring milk sugar, lactose. Flavoured or sweetened varieties may also contain added sugars. In the United States, the FDA Nutrition Facts label lists total sugars and shows added sugars beneath it. In the UK, EU and Australia, nutrition panels generally report sugars, but the format and rules are not identical to the US label. Check the ingredients for sweeteners such as sugar, syrup or honey, and don’t mistake total sugars for added sugars: total sugars can include lactose.
A survey by J. Bernadette Moore, Annabelle Horti and Barbara A. Fielding examined 921 products listed by five major UK supermarkets in November 2016. The researchers grouped products into categories, including “natural/Greek style”; that group had median total sugars of 5.0 g per 100 g, largely from lactose. The survey also found wide variation across yogurt categories. It was a snapshot of UK supermarket products, not a current or direct comparison of every Greek and regular yogurt, but it illustrates why a product’s flavour and ingredients matter as much as its style.
Names And Nutrition Labels Depend On Where You Shop
There is no single label-reading shortcut that works identically across the US, UK, EU and Australia. In the US, look for the separate added-sugars line as well as total sugars. In the UK, EU and Australia, check the local nutrition panel and ingredient list; you may need the ingredients to tell whether sugars were added. Terms such as “Greek” and “Greek-style” also do not, on their own, tell you exactly how a product was thickened. When the process matters to you, check the pack rather than assuming the same naming convention applies everywhere.
For a simple choice, compare plain products per 100 g for protein and calcium, then check the ingredients and sugar information for the version you actually plan to eat. If you prefer a thick texture or want more protein, strained yogurt may suit you; regular yogurt can still be a good choice, especially if its calcium content or price better fits your needs.