Life stage
Postnatal and supplements
After birth, the NHS recommends women who are breastfeeding continue a daily 10 microgram vitamin D supplement. Beyond that, a varied diet, fluids and rest do most of the work for recovery and energy. Many supplements have not been tested for breastfeeding, so always check suitability with your GP, pharmacist or health visitor first.
What changes nutritionally
The postnatal period is about recovery and, for many, breastfeeding. Energy needs are high while sleep is short, which makes diet quality and hydration the priorities rather than any single supplement. Vitamin D is the one the NHS continues to recommend for breastfeeding women. Iron can be a question for women who lost more blood during birth, but that is something to confirm with a GP rather than guess at.
Because some supplements pass into breast milk, this stage calls for the same caution as pregnancy: check a product is suitable for breastfeeding before taking it.
The supplement categories that matter
- Vitamin D: NHS-recommended at 10 micrograms daily while breastfeeding.
- Iron: only if your GP advises it, based on how you feel and any tests.
- Magnesium: some women ask about it for tiredness; check it is suitable while breastfeeding and speak to your pharmacist.
- Collagen and cosmetic supplements: check breastfeeding suitability before use.
Where this fits across the life stages
The postnatal period follows pregnancy. Later stages are covered in our perimenopause, menopause and senior years guides.
Frequently asked questions
What does the NHS recommend after birth?
The NHS recommends that women who are breastfeeding continue a daily 10 microgram vitamin D supplement. Breastfed babies from birth to one year may also be advised to have a vitamin D supplement. Follow current NHS guidance and your health visitor’s advice.
Can I take supplements while breastfeeding?
Some supplements pass into breast milk, so suitability matters. Vitamin D is recommended; many others have not been tested for breastfeeding. Always check the label says it is suitable while breastfeeding and speak to your GP, pharmacist or health visitor before starting anything new.
What about energy and recovery?
Tiredness is common after birth. A varied diet, fluids and rest do more than any supplement. If you feel persistently exhausted or low, that is worth raising with your GP or health visitor rather than reaching for a product, as it can have a medical cause.
Is iron worth taking postnatally?
Only if advised. Some women are low in iron after birth, but this should be confirmed and managed with your GP rather than self-treated with high-dose supplements. Speak to your GP if you feel unusually tired or breathless.
This is information, not medical advice, and is not a substitute for a registered clinician. While breastfeeding, always check any supplement with your GP, pharmacist or health visitor first.
Editor, Her Vitals
Oliver leads Her Vitals's editorial coverage of women's life-stage health and supplements. He curates and reviews existing branded products across trying to conceive, pregnancy, postnatal, perimenopause, menopause and the senior years, weighing what the evidence supports against guidance from bodies such as EFSA, the NHS and NICE, and is clear that the content is information rather than medical advice.
Last reviewed: 8 June 2026