Plain yogurt

Plain yogurt is milk fermented by two lactic bacteria, Streptococcus thermophilus and Lactobacillus bulgaricus. Per 100 g it provides about 61 kcal, 3.5 g of protein, 4.7 g of carbohydrates (mostly leftover lactose) and 3.3 g of fat, with no fibre. It is a moderate-energy food with a decent protein-to-calorie ratio that is not exceptional, far from Greek yogurt or skyr, which concentrate more protein.

Its real value lies elsewhere: it is cheap, easy to digest, available everywhere and fits almost any meal, from breakfast to an evening sauce. A 125 g pot is barely 76 kcal and 4.4 g of protein, a light snack you can repeat without straining your calorie budget. For an athlete it is mostly a building block: you add fruit, oats or whey to give it the profile you want.

During fermentation, the bacteria convert part of the lactose into lactic acid. As a result, yogurt contains less lactose than milk and is often better tolerated by people who struggle to digest that sugar. The live cultures, present in large numbers in a yogurt that is not heat-treated after fermentation, also help break down the remaining lactose. That is why many people who avoid a glass of milk handle one or two yogurts a day very well.

As for gut flora, yogurt cultures do not settle permanently in the intestine, but they pass through it, and regular intake is linked to better digestive comfort in some people. Do not expect a miracle: it is one support among others, best combined with fibre (fruit, oats, seeds) that feeds the bacteria already living there. If you are sensitive, start with one pot a day and watch your tolerance before increasing.

Read the ingredient list: a true plain yogurt contains only milk and cultures, sometimes milk powder for texture. Avoid so-called sweetened plain or flavoured versions, which can add 10 to 15 g of sugar per pot. A label showing more than 6 g of carbohydrates per 100 g should ring a bell, as it usually signals added sugar. Stirred yogurt, which is creamier, and set yogurt have very similar nutrition profiles.

You can also pick by fat level: whole milk around 3.3 g of fat, low-fat or 0% under 0.5 g. Whole yogurt is more filling and pairs well with a carb-rich diet, while the 0% version gives slightly more protein per calorie. Organic or farm labels do not radically change the macros but can guarantee milk origin and a stricter specification, which remains a personal choice.

When bulking, plain yogurt alone is too light: you would need a lot of it to hit your targets. But it becomes an excellent vehicle. Mix 250 g of yogurt with 40 g of oats, a banana and a spoon of peanut butter and you reach over 400 kcal and 20 g of protein easily, in a format that is easy to swallow even when appetite is low. Adding a scoop of whey pushes the portion to 35 g of protein.

It also supplies calcium, about 120 mg per 100 g, vitamin B12 and some potassium, minerals useful for muscle contraction and bone health. To build up healthy calories, play with the toppings rather than the yogurt itself: nuts, honey, dried fruit, granola. You keep a digestible base and control the energy density according to your needs that day.

When cutting, plain yogurt keeps its place as long as you build around it. At 61 kcal per 100 g it costs few calories and adds volume. To raise the protein, replace part of the pot with fat-free fromage blanc or skyr, or add a spoon of whey. Complete with raspberries or blueberries, low in sugar, for a 150 to 200 kcal dessert that calms evening hunger without wrecking your deficit.

Whole-milk yogurt is not a problem in itself: the gap with the low-fat version is no more than 3 g of fat, roughly 30 kcal per 100 g. What matters is your daily total. However, be wary of flavoured 0% yogurts, often compensated with sweeteners or sugar. Always favour plain and sweeten it yourself in a controlled amount with cinnamon, vanilla or a drizzle of honey.

Keep your yogurt in the fridge between 0 and 4 °C. The printed date is generally a best-before date: a sealed, well-kept pot is often still edible a few days later, provided it shows no swelling, odd smell or mould. Once opened, eat it within 2 to 3 days and use a clean spoon each time to avoid introducing bacteria. A little whey on the surface is normal, simply stir it in.

Classic mistakes include counting on yogurt as your main protein source (you need nearly 800 g for 28 g), choosing fruit versions thinking they are healthy, or boiling a yogurt sauce, which makes it curdle. For a sauce, add the yogurt off the heat or stabilise it with a little starch. Finally, if you have a genuine milk protein allergy, yogurt should of course be avoided.