New Delhi: While the monsoon brings relief from summer heat, it also creates challenges for people living with diabetes, particularly those who rely on insulin. Health experts caution that high humidity and fluctuating indoor temperatures during the rainy season can affect insulin storage, potentially reducing its effectiveness if it is not handled properly.
Doctors say improper storage of insulin may lead to poor blood sugar control, making it important for patients to follow recommended storage practices during the monsoon.
Humidity may affect insulin quality
Insulin is a protein-based hormone that is sensitive to environmental conditions. While exposure to high temperatures is widely recognised as harmful, experts say prolonged exposure to excessive humidity may also compromise insulin if storage guidelines are not followed.
According to Dr Sameer Bhardwaj, Senior Consultant Endocrinologist, moisture can accumulate on insulin vials and pens during humid weather, increasing the risk of contamination and affecting insulin potency.
He noted that unexplained spikes in blood glucose levels are often reported during the rainy season and may sometimes be linked to improperly stored insulin.
Experts advise patients to use insulin only within the manufacturer’s recommended storage conditions and consult their healthcare provider if they suspect their insulin has been compromised.
Common storage mistakes during the monsoon
Doctors highlight several common mistakes that may affect insulin storage during humid weather.
One of them is relying solely on evaporative cooling wallets. These products work by allowing water to evaporate and cool the contents. However, during periods of very high humidity, evaporation becomes less effective, reducing their cooling ability.
Another common mistake is storing insulin in the refrigerator door. Frequent opening and closing of the door exposes insulin to repeated temperature fluctuations, which may affect its stability. Experts recommend storing insulin on the middle shelf of the refrigerator, where the temperature remains more consistent.
Patients are also advised not to assume that insulin is safe simply because it appears clear. Changes in potency are not always visible, and insulin may lose effectiveness without obvious changes in colour or appearance.
Tips for safe insulin storage
Healthcare professionals recommend the following precautions during the rainy season:
- Store insulin according to the manufacturer’s instructions.
- Keep unopened insulin in the refrigerator, preferably on the middle shelf rather than the door.
- Place insulin pens or vials in a clean, airtight container to help protect them from excess moisture.
- Avoid exposing insulin to direct sunlight or excessive heat.
- If blood sugar levels become unexpectedly difficult to control despite following prescribed treatment, consult a doctor before making any changes to insulin dosage.
Experts caution against increasing insulin doses without medical advice, as poor blood sugar control may sometimes result from degraded insulin rather than inadequate dosing.
Consult a doctor if insulin is suspected to be ineffective
Doctors advise people with diabetes to regularly inspect their insulin and monitor blood glucose levels, especially during the monsoon.
If there is any concern that insulin has been exposed to unsuitable conditions or is no longer working effectively, patients should replace it with a properly stored supply after consulting their healthcare provider.
Experts emphasise that proper storage, regular monitoring and timely medical guidance remain essential for maintaining good diabetes control throughout the rainy season.