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Why does breast milk not contain enough vitamin D?

The Vitamin D Deficiency in Breast Milk: An In-Depth Look
Breast milk is often hailed as the gold standard for infant nutrition, providing a perfect blend of nutrients essential for a baby’s growth and development. However, one notable exception is vitamin D, a crucial nutrient that supports bone health and immune function. Despite its many benefits, breast milk typically contains insufficient levels of vitamin D, raising concerns among healthcare professionals and parents alike.
The Nature of Vitamin D in Breast Milk
Vitamin D is indeed present in human milk, but in very low concentrations. Studies indicate that breast milk generally contains between 5 to 80 IU (International Units) per liter of vitamin D, which is significantly below the recommended daily intake for infants. This deficiency is particularly concerning because vitamin D plays a vital role in preventing conditions like rickets, a disease characterized by weak or soft bones in children.
The primary source of vitamin D for infants is not breast milk but rather sunlight exposure and dietary supplements. The body synthesizes vitamin D when the skin is exposed to ultraviolet (UV) rays from the sun. However, many infants, especially those who are exclusively breastfed, may not receive adequate sunlight due to factors such as limited outdoor activity, geographic location, and the use of sunscreen.
Maternal Influence on Vitamin D Levels
The vitamin D content in breast milk is influenced by the mother’s own vitamin D status. While maternal supplementation with vitamin D can increase the levels in breast milk, studies have shown that even with supplementation, the concentrations may still fall short of meeting an infant’s daily requirements. For instance, daily maternal supplementation of vitamin D in the range of 10 to 50 mcg (400 to 2,000 IU) has been found to produce milk concentrations that are inadequate for exclusively breastfed infants.
This situation is compounded by the fact that many women, particularly those with limited sun exposure or dietary intake of vitamin D-rich foods, may themselves be deficient in this essential nutrient. Consequently, their breast milk may not provide sufficient vitamin D for their infants.
Recommendations for Breastfed Infants
Given the low levels of vitamin D in breast milk, health organizations, including the American Academy of Pediatrics, recommend that breastfed infants receive a daily vitamin D supplement of 400 IU starting shortly after birth. This supplementation is crucial to ensure that infants receive adequate amounts of vitamin D to support their growth and prevent deficiencies.
In summary, while breast milk remains the most nutritious food for infants, its inadequate vitamin D content necessitates additional measures to ensure that infants receive this vital nutrient. Parents and caregivers are encouraged to consult healthcare providers to establish appropriate supplementation strategies for their breastfed infants, ensuring optimal health and development during these critical early months.

How do I add vitamin D to my breast milk?

You can administer vitamin D drops directly into a baby’s mouth or add the drops to your baby’s formula. If you’re breastfeeding, drop the supplement onto your nipple before your baby latches. The great thing about vitamin D drops is that they come pre-dosed. Most brands offer a 400 IU daily dose of vitamin D per drop.

Why do breastfed babies rarely suffer from rickets?

Vitamin D is important for bone health, helping prevent nutritional rickets and fractures. Vitamin D levels are low in breast milk and exclusively breastfed infants are at risk of low vitamin D levels. Study characteristics: evidence is up‐to‐date as of May 2020.

Are vitamin D drops necessary for breastfed babies?

Breastfed or partly breastfed babies need 400 international units (IU) of liquid vitamin D a day. This should start soon after birth. Babies need this amount of vitamin D supplement until weaned or until they drink 32 ounces (about 1 liter) a day of formula with added vitamin D.

What if I forgot to give my breastfed baby vitamin D drops?

Give your baby the supplement when you remember – but don’t give more than one dose a day. Do not give extra to make up for missed days. * This is a public health recommendation for healthy infants.

Why doesn’t breast milk have enough vitamin D?

The current recommendation of 400 IU per day to these individuals does little to sustain blood concentrations of the parent vitamin D compound, the form that crosses from the maternal circulation into human milk; thus, minimal vitamin D is transferred into human milk.

How to increase vitamin D in breast milk?

Research shows that high dose maternal vitamin D supplementation (4000-6400 IU/d or a single monthly dosage of 150,000 IU) can enrich breastmilk adequately for infants. Maternal supplementation may better ensure adequate intake for both mother and baby as studies also show a higher preference for this method.

Which vitamin is most deficient in breast milk?

The one to be most aware of is vitamin B12. Studies have shown that mothers who don’t get enough only provide an estimated 16% of their baby’s vitamin B12 requirements. Vitamin B12 is one of the top 3 most common micronutrient deficiencies affecting pregnant and nursing moms.

Is it possible for breast milk to not have enough nutrients?

Evidence indicates that undernourished lactating individuals may produce breast milk containing lower concentrations of certain vitamins and minerals.

How can I prevent my breastfed baby from getting rickets?

  1. Key Finding: Dark-skinned infants and children who are fed only breast milk should receive 400 IU of vitamin D supplementation daily, beginning by at least 2 months of age, to prevent rickets.
  2. Vitamin D is necessary for proper bone growth, but it is not found in many foods naturally.

Is it too late to give my baby vitamin D?

So the recommendation is that the baby should receive its own oral vitamin D drops containing 7-8.5µg per day from 4 weeks of birth until the age of 5 years. Waiting until the baby is 6 months may be too late to prevent development of symptoms. Mothers may also develop symptoms of deficiency themselves.

Natasha Lunn

Tash is an IBCLC and Business Coach helping fellow IBCLCs create fun, profitable businesses that are more than just an expensive hobby. Before becoming an IBCLC and starting her private practice - The Boobala, Tash graduated as an Osteopath in 2008 and has been in Private Practice in South West Sydney. She was also a volunteer Breastfeeding Counsellor and Community Educator with the Australian Breastfeeding Association for 6 years. Through her business, Your Lactation Biz, Tash coaches and creates products to help new and seasoned IBCLCs build businesses that suit their personality and lifestyle.

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