A Breath of Fresh Air: Can Inhaled Insulin Be a Weight-Smart Option for Women with Diabetes?

Weight gain is one of the most common and most frustrating side effects of insulin therapy, particularly for women. How would it make you feel to know that inhaled insulin may be a weight-smart option?

A snapshot of inhaled insulin

Inhaled insulin starts working within 12 to 15 minutes, takes action, and is gone within 1.5 to 3 hours. This unique ultra-rapid-acting form of insulin is much faster than injected rapid-acting insulin. The 2025 Standards of Care in Diabetes evidence-based guidelines for diabetes management were expanded this year to address inhaled insulin. The 2025 Standards acknowledge that inhaled insulin can be an effective option for people with diabetes, providing an alternative method of insulin delivery with a very fast onset of action. 

What the science tells us about inhaled insulin and weight

Rapid-acting inhaled insulin has been around for over a decade, yet researchers continue to be interested in its benefits, including its impact on weight. Multiple studies have shown that it is associated with less weight gain compared to injectable insulin, and in some studies, it has even shown modest weight loss. 

• A 2024 scientific review article that looked at 10 studies of inhaled insulin use in people with type 1 and type 2 diabetes concluded that inhaled insulin results in less weight gain than injected insulin.
• A 2025 study by Hirsch IB et al. included participants with type 1 diabetes using inhaled insulin along with degludec, a long-acting insulin. Findings showed an increase of in-range glucose after meals with fewer lows; and that weight change was not significant, trending favored stability.
• In another 2025 study, researchers observed that in adults with type 1 diabetes also taking rapid-acting inhaled insulin with long-acting degludec, the average weight change over the course of the 13-week study was a loss of 0.2 kg (0.4 pounds).
• And a 2021 study by Hoogwerf et al. focused on individuals with type 2 diabetes using rapid-acting inhaled insulin in combination with glargine, a long-acting synthetic form of human insulin. The study found that participants experienced a modest weight loss of 0.78 kg (1.72 pounds).

What inhaled insulin means for weight: One woman’s experience

“ [Inhaled insulin] has made a big difference in helping me manage my weight. Since starting it, I’ve had far fewer hypoglycemia episodes, which means I’m no longer constantly eating extra snacks or calories to treat lows. Just by cutting out those hypos, I’ve been able to reduce my calorie intake significantly. It’s been a game-changer for keeping my blood sugars and weight more balanced.” -Adriana Wright, [inhaled insulin] user since 2015

Whether you are currently using or considering rapid-acting inhaled insulin as a meal-time insulin, wouldn’t it be liberating to worry less about weight gain?

What makes inhaled insulin easier on the scale?

Evidence and user experiences like Adriana’s suggest that, given the following characteristics, inhaled insulin may help limit weight gain by:

1. Reducing overall insulin exposure. Inhaled insulin’s rapid action means it’s there when you need it and gone when you don’t. It provides glucose management in the moment and doesn’t hang around..

2. Generally causing less hypoglycemia. While hypoglycemia is a risk with any insulin, many report less hypoglycemia with inhaled insulin due to its rapid absorption and shorter duration of action. Less hypoglycemia means less need for carbohydrate snacks and less overeating to treat lows, which in turn can help manage calorie intake, potentially supporting weight neutrality.

3. Minimizing risks of post-meal “stacking.” Inhaled insulin’s action makes it ideal for matching after-meal glucose spikes. Due to its quick action, correction can be given an hour after eating – a game changer if you’ve used injected mealtime insulin. No more waiting 3 to 4 hours before correcting a glucose elevation, then worrying about insulin doses stacking and causing hypoglycemia. It’s all about the timing.

Many individuals like Adriana have personal stories of avoiding weight gain or even losing weight with inhaled insulin. Yet, keep in mind that everybody is different and that weight changes can vary from person to person and may be influenced by other factors such as diet, physical activity, and other medications being taken.

Managing glucose can seem like a vicious cycle. The increased insulin required to bring glucose into target ranges can lead to weight gain over time. And with weight gain, typically more insulin is required, which perpetuates the cycle. Inhaled insulin may be able to help. 

• How would it feel to not have to worry so much about weight gain? One less thing to stress over…a moment of relief in an otherwise complicated daily routine? 
• Could inhaled insulin be a choice you want to explore? 
• Or discuss with your healthcare team as part of a weight-inclusive diabetes management plan?

For more resources on inhaled insulin, visit our Inhaled Insulin hub. You can also join other women navigating similar experiences in our online communities. With DiabetesSisters you are not alone.