GM Diet After Delivery: Is It Safe?

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GM diet after delivery: is it safe?

Why a crash diet is a poor fit after giving birth, and what helps instead.

Updated 27 October 2026Not yet reviewed by a registered dietitianMedical disclaimer

Is the GM diet safe after delivery?

We do not recommend the GM diet after giving birth. Your body is recovering, and if you are breastfeeding you need more energy, protein, calcium and fluids than usual. A very low-calorie plan can leave you tired and short of nutrients, and it is not designed for this stage.

What to do instead

  • Talk to your doctor, midwife or a registered dietitian about when and how to start losing weight.
  • Eat regular meals with vegetables, fruit, a protein food, whole grains and dairy or calcium-rich alternatives.
  • Drink to thirst, especially while breastfeeding.
  • Start gentle activity, such as walking, once your doctor agrees. After a caesarean, wait for medical clearance.
  • Give it time. Gradual weight loss over months is normal and safer than a crash diet.

When could the GM diet be considered?

Only once you have fully recovered, are no longer breastfeeding, and a doctor has confirmed it is safe for you. Even then, a balanced plan you can keep will do more for your long-term health. Read what the evidence says about the GM diet.

Frequently asked questions

Can I do the GM diet while breastfeeding?

We do not recommend it. Breastfeeding raises your needs for energy, protein, calcium and fluids, which the GM diet does not meet.

When can I start losing weight after giving birth?

Speak to your doctor, midwife or a registered dietitian. Gradual weight loss over months is normal and safer than a crash diet.

What helps with weight after pregnancy?

Regular balanced meals, drinking to thirst, gentle activity once your doctor agrees, and patience.