Excessive crying and fussing in babies for unexplained reasons is not an uncommon occurrence in otherwise thriving babies, especially in the first 12 weeks of life. Despite many years of study, until now we have know very little about causes and ways to reduce colic in babies.
A landmark Australian trial (1) published in October 2018 has demonstrated that reducing the FODMAP content of the mothers diet can significantly reduce colic in their breastfed babies.
Despite this trial being small, the high quality design (double blinded randomised controlled) means the findings are worth taking notice of.
What is colic?
Colic is described as bouts of crying or fussing for unexplained reasons that can occur in otherwise thriving babies (2, 3).
Excessive crying is estimated to occur in up to one third of babies 3 months and younger (4) although often spontaneously resolves by age 3‐4 months without intervention.
There is even a set of criteria to define colic: the WESSEL CRITERIA. To medically term a baby as suffering from colic, the the following criteria needs to be met:
crying episodes lasting for more than 3 hours per day
for three or more days per week
and for three or more weeks (3, 5).
What the study showed
The Australian FODMAP and colic study included 13 mothers and babies with colic who were provided with a low FODMAP diet for around 10 days followed by a typical Australian diet for the same length of time, or the other way around.
As a control, 7 mothers with babies without colic followed the same protocol except followed their normal diet and not given dietary advice.
The babies were all 9 or less weeks old.
While colic was shown to reduce over time, the reduction with the low FODMAP diet was greater than that with the typical Australian diet:
Colic was reduced by a median of 32% during the low FODMAP diet
Some of this reduction would happen anyway as shown by the reduction of 20% on the typical Australian diet
This extra level of colic reduction with the low FODMAP diet is significant.
An average reduction of 32% means 1/3 less colic, so still an appreciable amount continuing, which may be part of the natural tendency of babies as they move through their natural stages. Ongoing colic that seems not to be improving may benefit from medical and dietary review.
The study also debunked a common long held belief:
Incredibly, excessive crying & fussing were found NOT to be due to babies being overstimulated, awake for long periods of time, or ‘over‐tired’ due to not enough sleep or being hungry!
How a low FODMAP diet may reduce colic
This is unclear, especially as it is thought that FODMAPs from the mothers' diet cannot pass into the breast milk.
There are a few thoughts as to why this may happen, although it is far from clear.
FOOD CHEMICALS in breast milk
A low FODMAP diet will also reduce other allergens and/or food chemicals such as salicylates, amines and glutamates.
However, in this study it is less likely as this was taken into account in the design of the diets. The low FODMAP diet and the typical Australian diet used supposedly included food chemicals and potentially allergenic foods in comparable amounts.
BACTERIA in breast milk
It is presumed that the microbiota of breast milk will influence the baby's gut microbiota. In animal models, the mother's gut bacteria can migrate into the breast milk but this has not been established in humans (6).
If this is the same in humans, then feasibly changing the maternal diet FODMAP content may mean the breast milk bacteria is also changed and passed onto the baby.
FODMAPs in breast milk
Breast milk naturally contains FODMAPs such as lactose and hundreds of human oligosaccharides unique to breast milk and very different to the oligosaccharides found in food (6, 7).
Of interest is 2′‐fucosyllactose which accounts for more than 30% of total human milk oligosaccharides (8) and low levels have been linked to higher rates of diarrhoea in breastfed infants (9). The significance of this requires further studies.
METABOLITES in breast milk
The break down of FODMAPs may produce other chemicals as a by product (called metabolites) which could be passed into the breast milk.
For example, eating garlic has been shown to result in a garlicky smell oil breast milk within 2-3 hours (10). This is not caused by the garlic aroma chemicals directly passing into the breast milk but the break down products (metabolites) which are able to cross over into the breast milk. In a similar fashion, other metabolites from the breakdown of FODMAPs may be transferred to breast milk.
Any ways to modify or reduce colic in a baby is a very attractive option for mothers dealing with excessive crying in a baby.
Before undertaking such restrictions, the following may need to be considered
When breast feeding, it is really important to eat a diversity of foods to meet nutritional needs.
Breast feeding requires extra energy, with an extra 2000kj required each day in addition to normal requirements.
A low FODMAP diet can seem overwhelming at first so to avoid unnecessary restrictions, seek professional support and minimise necessary restrictions.
Other restrictions such as dairy or soy protein restrictions increases the level of complexity and places a nutritional risk due to a high level of diet restriction
The low FODMAP diet is not a wheat or gluten free diet, avoidance of wheat or gluten in conjunction can significantly increase impact on the nutritional content of the diet.
Any diet changes can negatively affect the mother's nutrition at a time when extra nutrients and calories are needed.
So while this diet could be implemented for babies with colic, care needs to be taken to ensure a variety of nutritional alternatives and overall nutritional adequacy. This is really important if there are other dietary restrictions in place.
Reviewed 16/5/22
REFERENCES
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