Part of the “Small changes, big results” series.

The habit in one line

Add one small bowl of plain curd, a glass of chaas, or a bowl of raita to your lunch.

That's it. You don't have to remove anything from your plate.

Why it's worth doing for your hormones and cycle

Curd gives you protein, and protein helps meals feel more filling. A filling lunch can mean fewer cravings by 4 pm, and steadier energy through the afternoon.

Curd also adds a little cool, creamy comfort to a plate of dal, rice and roti. Meals you enjoy are meals you keep eating.

What it can do for weight loss over time

Here is what the research says, and it is a modest story. A review of studies found that people who eat more yoghurt tend to have lower body weight and body fat. But that is an association, not proof that yoghurt causes it. The small trials we have are short and give mixed results.

So think of curd as a helpful add-on, not a fat-loss trick:

• It adds protein to a carb-heavy plate
• It can make lunch more filling
• It is easy to keep up, because it is already part of Indian meals

What to expect, and when

• Week 1-2: It becomes a regular part of your plate
• Weeks 3-4: You may notice lunch feels more satisfying
• Month 2-3: It is just how you eat lunch now

Imagine Sneha, 26. She often skips the sabzi and fills up on rice, then gets hungry by 4 pm. She adds a bowl of plain curd and cucumber raita. Over a few weeks she finds she can wait until her evening snack without reaching for biscuits.

That is how small changes become big results.

What it works best with

• Regular meal times
• Vegetables on the plate
• Daily movement, like a walk after lunch
• Your treatment and follow-ups, if you have any

Think of it as the first domino. It is not a cure for PCOS.

A quick check before you start

• Choose plain curd or chaas. Flavoured yoghurts often have a lot of added sugar
• Keep the portion small, about one katori
• If curd gives you gas, bloating or an upset stomach, skip it and ask your doctor

When to talk to a doctor

• Very irregular periods, or no period for 3 months or more
• Heavy or painful periods
• Sudden weight gain or loss
• Worsening acne, hair fall or facial hair
• Extreme hunger, thirst or tiredness
• Trouble conceiving after a year of trying (6 months if you are over 35)

Sources: Eales J, et al. Is consuming yoghurt associated with weight management outcomes? Results from a systematic review. Int J Obes 2016;40:731-746. The evidence is mostly observational, so we describe an association, not a cause.