The honeymoon phase (remission) in type 1 diabetes

The honeymoon period is a temporary phase after a diagnosis of type 1 diabetes when your pancreas still produces its own insulin [1]. Once you start insulin treatment and your blood glucose normalises, the remaining beta cells (5-20%) recover from "glucose toxicity" and start working better again. Your insulin requirement from external sources drops dramatically, often below 0.5 units/kg/day and sometimes even less [2].

It is called a "honeymoon" because it feels like a magical period when diabetes appears to have disappeared. Blood glucose levels are stable, you have no hypoglycaemia and you feel almost normal. However, like any honeymoon, it is temporary [1]. The autoimmune process continues to destroy the remaining beta cells, and after a while your insulin requirement will rise again.

The duration of the honeymoon period varies enormously, from a few weeks to almost 3 years, with an average of 7-9 months [3]. In young children (under 5 years) it may be completely absent or last for a shorter time, as the autoimmune process is generally more aggressive [4]. Adolescents usually have a few months of remission, while adults diagnosed with LADA can have a honeymoon period of 3 years [5].

Factors that prolong the honeymoon period include excellent glycaemic control from the start (preventing glucotoxicity), early diagnosis before ketoacidosis, older age at onset and the presence of at most one autoantibody [4]. You cannot predict the exact duration, but monitoring C-peptide and your insulin requirement can show you when you are approaching the end [6].

You need less insulin during the honeymoon period because your surviving beta cells have partially resumed their function [1]. When your blood glucose was very high before diagnosis, the beta cells were paralysed by so-called glucose toxicity. Once blood glucose is normalised with external insulin, they recover and can produce insulin again, although often not enough for complete independence [6].

In addition, your insulin sensitivity has improved in the meantime. Your body's cells now respond better both to injected insulin and to insulin produced internally [2]. It is like having temporary help that covers at least half of your insulin requirement, if not all of it. This residual production also makes control easier, with fewer blood glucose fluctuations.

Most often you cannot stop insulin completely [7]. Sometimes, if your blood glucose levels are perfect, you can do this (total remission), but with a lifestyle adapted for this situation. Stopping insulin during the honeymoon period when your blood glucose levels and lifestyle do not actually allow it accelerates the destruction of the remaining beta cells and can lead to ketoacidosis [8]. Maintaining a minimum insulin dose (0.1 units/kg/day) prolongs the honeymoon period and residual beta cell function [7].

Even if your blood glucose seems normal without insulin, the autoimmune process continues. Without external insulin, the beta cells are forced to work at maximum capacity, which attracts the immune system [8]. External insulin gives them "rest" and may have a protective effect. Reducing your insulin doses during the honeymoon period according to your needs is always a safe approach (partial remission).

The end of the honeymoon period sets in gradually, not abruptly [6]. Early signs include an increased insulin requirement (0.5 units/kg/day), variable blood glucose that is harder to control, the reappearance of high morning blood glucose (the dawn phenomenon), the need for more frequent and larger corrections, and sometimes the appearance of ketone bodies with persistently high blood glucose [9].

C-peptide monitoring objectively confirms the end of the remission period [9]. When stimulated C-peptide falls below 0.2 nmol/L (approximately 0.6 ng/ml), residual production is clearly insufficient. It is not a personal failure when the honeymoon period ends. It is the natural, inevitable evolution of the disease. Prepare yourself psychologically and practically for the transition, inevitable at some point, to more intensive diabetes management.

No, not all patients with type 1 diabetes have a honeymoon period. However, at least half of patients experience a period of partial remission, and approximately one fifth start directly with complete insulin dependence [3]. Very young children (under 5 years) and those with onset in severe ketoacidosis have fewer chances of a honeymoon period [4]. Complete and rapid destruction of the beta cells sometimes leaves nothing to recover.

Adults and those diagnosed early, before the appearance of severe symptoms, have a higher chance of a honeymoon period [10]. The presence of residual secretory function and excellent glycaemic control from the start are positive predictors of at least partial remission. The absence of a honeymoon period does not mean a worse long-term prognosis, just the need for more intensive management from the beginning.

Yes, you can influence the duration of the honeymoon period through strict glycaemic control [1]. Maintaining blood glucose between 70-140 mg/dl (3.9-7.8 mmol/L) reduces stress on the beta cells and slows destruction. Avoiding episodes of severe hyperglycaemia and ketoacidosis is crucial [8]. These accelerate the loss of residual secretory function. Good glycaemic control in the first year appears to contribute to maintaining beta cell function [11].

Regular physical exercise improves insulin sensitivity and reduces requirements, indirectly protecting the beta cells [10]. Some studies suggest that a moderate low-carb diet may help. Taking part in clinical trials of therapies that maintain beta cell function (immunomodulators) offers additional chances of prolonging the temporary remission period [7].

Blood glucose fluctuates during the honeymoon period because of the inconsistent and unpredictable production of endogenous insulin [12]. The remaining beta cells do not always work in the same way. Sometimes they produce more, other times less, depending on several factors such as stress, sleep or various infections. This variability overlaps with the insulin you may inject, creating further variability [6].

In addition, the response of the beta cells to stimuli (food) is delayed and inadequate. The remaining beta cells can sometimes release insulin when they should not, leading to unexplained hypoglycaemia [12]. At other times they seem not to respond when you need them, with hyperglycaemia appearing after a somewhat larger meal. It is frustrating, but temporary. Flexibility in choosing your insulin doses and frequent monitoring are the key to adapting to these fluctuations.

It is absolutely normal and beneficial! Partial remission means you still have residual beta cell function, which makes management easier, although, it is true, only temporarily [2]. Partial refers to the fact that you do not stop insulin completely. It is not a cure or a sign that the diagnosis was wrong. It is part of the natural evolution of type 1 diabetes in most patients and should be made the most of for as long as it lasts [9].

The presence of a honeymoon period is associated with a better long-term prognosis [9]. The reason lies in better glycaemic control, with less variability and a lower risk of chronic complications. People who maintain detectable C-peptide even many years after diagnosis (minimal beta cell function) have less glycaemic variability and a lower risk of severe hypoglycaemia [13]. Enjoy this period, but prepare yourself realistically for what comes next.

After the honeymoon period, you will need full doses of insulin (0.7-1.0 units/kg/day, or more during adolescence) [14]. Glycaemic control becomes more difficult, with increased variability and the need for frequent adjustments [9]. The dawn phenomenon and the dusk phenomenon (in the evening) become evident, requiring differentiated basal rates if you use an insulin pump. Your response to insulin starts to fluctuate more with the menstrual cycle, with stress or with various infections [14].

It is nothing serious, just a new stage that requires adaptation. Modern technologies (pumps, sensors, closed-loop systems) make management much easier than in the past. Most people adapt to the new normal within a few months.