Weight Loss Injections and Hair Loss: Can Ozempic, Wegovy or Mounjaro Cause Shedding?

Weight loss injections such as Ozempic, Wegovy and Mounjaro are now widely discussed in Australia. The Therapeutic Goods Administration (TGA) lists Wegovy and Mounjaro for chronic weight management, while Ozempic is approved for type 2 diabetes and is often discussed because it contains semaglutide, the same active ingredient used in Wegovy.

Along with the growing popularity of these medications, more people are asking the same question:
Can weight loss injections cause hair loss?

The short answer is that hair shedding can happen during treatment, but it is often linked to the stress of rapid weight loss, reduced calorie intake, and nutritional changes rather than the medicine alone. Official Australian product information for Wegovy and Mounjaro also includes hair loss or alopecia among reported adverse effects.

If you are noticing increased hair fall while on a weight loss journey, this article explains why it can happen, what side effects are most common, and how Dushi products can support a healthy hair care routine during this time.

What Are Weight Loss Injections?

The most talked-about weight loss injections in Australia are:

• Ozempic (semaglutide)
• Wegovy (semaglutide)
• Mounjaro (tirzepatide)

These medicines are part of a class used to help regulate appetite, blood sugar and weight. In Australia, the TGA notes that Wegovy is approved for chronic weight management, and Mounjaro is approved for both type 2 diabetes and chronic weight management.

Can Ozempic, Wegovy or Mounjaro Cause Hair Loss?

Hair loss is not the most common side effect, but it is a recognised concern.

The Australian product information for Wegovy reports hair loss in 2.5% of patients compared with 1.0% on placebo, and notes that it was seen more often in patients with greater weight loss.

The Australian product information for Mounjaro lists alopecia among common adverse reactions, with trial data showing it occurred more often in patients taking tirzepatide than placebo.

For people using Ozempic, hair loss is frequently discussed online, but the bigger picture is that significant weight loss itself can trigger temporary shedding, whether the person is losing weight through medication, surgery, illness or strict calorie restriction. Mayo Clinic lists significant weight loss as one of the causes of hair loss.

Why Does Hair Shedding Happen During Weight Loss?

Hair growth is closely tied to your body’s internal balance. When your body goes through a major physical change, more hairs can shift into the shedding phase.

This temporary shedding pattern is often called telogen effluvium. It can be triggered by:

• rapid weight loss
• physical stress on the body
• reduced calorie intake
• low protein intake
• nutrient deficiencies
• illness or hormonal changes

Medical sources describe telogen effluvium as a temporary form of shedding that can happen after a significant physical stressor or body change.

That means the issue may not be that the medication is directly damaging the hair follicle. In many cases, the body is simply reacting to the stress of quick weight change.

Common Side Effects of Weight Loss Injections

Although hair shedding gets a lot of attention, the most common side effects of these medications are usually digestive.

According to Australian medicine information and TGA safety updates, common side effects can include:

• nausea
• vomiting
• diarrhoea
• constipation
• stomach discomfort
• reduced appetite

The TGA has also updated warnings across the GLP-1 and dual GIP/GLP-1 medicine class for additional safety issues, showing how important it is to use these medicines under proper medical supervision.

How to Support Hair While Using Weight Loss Medications

If you are losing weight and noticing more hair fall than usual, it helps to focus on a supportive routine.

1. Prioritise scalp care

A healthy scalp creates a better environment for healthy-looking hair. Supporting the scalp with targeted hair care can be a smart step during times of increased shedding.

2. Be gentle with your hair

When your hair feels fragile, avoid unnecessary stress from rough brushing, excessive heat styling or harsh products.

3. Stay consistent with your routine

Hair does not usually respond overnight. A consistent routine matters, especially when the shedding may be temporary and linked to internal changes.

4. Check the basics

Because significant weight loss can affect nutrition, it is worth speaking with your doctor about whether you are getting enough:

• protein
• iron
• zinc
• vitamin D

5. Speak with your GP if shedding is severe

Inkerman Medical Centre advises seeing a doctor if hair loss is sudden, patchy, or more than usual, because it can sometimes point to another underlying issue.

How Dushi Products Can Help Support Your Hair Routine

If you are dealing with hair shedding while using weight loss injections, Dushi can be part of your supportive hair care routine.

Dushi products are not a treatment for medication side effects, but they can help support the appearance of fuller, healthier-looking hair and encourage a more consistent scalp and hair care routine.

Dushi Hair Growth Serum

The Dushi Hair Growth Serum can be used as part of a scalp-focused routine to help support healthier-looking, fuller-looking hair over time.

Dushi Give Me Hair Shampoo

The Dushi Give Me Hair Shampoo is a supportive option for people who want a consistent cleansing routine that fits into a hair growth-focused regimen.

Why a supportive routine matters

When hair is under stress, consistency matters. A routine that focuses on scalp care, gentle cleansing and ongoing maintenance can help support hair confidence while your body adjusts.

Final Thoughts on Weight Loss Injections and Hair Loss

Weight loss medications such as Ozempic, Wegovy and Mounjaro are becoming increasingly common in Australia, and so are questions about side effects like hair shedding. Australian product information for Wegovy and Mounjaro shows that hair loss can occur in some users, while broader medical guidance also points to rapid weight loss itself as a common trigger for temporary shedding.

If you are going through this, you are not alone.

The right medical guidance, a consistent hair care routine, and supportive products can all make a difference. Dushi is here to help you care for your scalp and strands through every stage of your journey.

FAQ 

Do weight loss injections cause hair loss?

They can be associated with hair shedding, but in many cases the shedding is related to rapid weight loss, reduced calorie intake or nutritional changes rather than the medicine alone

Is hair loss from Ozempic permanent?

Temporary shedding linked to major body stress or weight loss is often described as telogen effluvium, which usually improves over time.

Which weight loss drugs are linked to hair loss?

Wegovy and Mounjaro product information in Australia includes hair loss or alopecia among reported adverse effects.

Can hair grow back after weight loss shedding?

Temporary shedding from telogen effluvium often improves once the trigger settles and the body stabilises.