GLP-1s and Hair Loss – How to Support Your Hair During Weight Loss

GLP-1 medications can be life-changing when it comes to getting control of your metabolic health, supporting blood sugar regulation, and delivering weight loss solutions. On the less-positive side, there's increasing evidence of the link between GLP-1s and hair loss¹ – a scary side effect that can leave GLP-1 users feeling caught between a rock and a hard place.

 

 

To understand what’s happening – and how The System, Arey’s nutritional supplement and scalp serum combo can help GLP-1-related hair loss – it’s important to dig into how hair loss and thinning occur. 

 

It can be devastating when you see your hair filling up the shower drain, but there is a lot you can do to help your tresses. Here’s what you need to know about GLP-1s and hair loss, ways you can prevent it, and tips for encouraging regrowth:

 

How GLP-1 Medications Can Trigger Hair Loss

Sudden hair loss – known as telogen effluvium – happens when a larger-than-normal number of your hair follicles (roots) shift from the growth phase (anagen) into the shedding phase (telogen). 

 

 

A rapid systemic change is basically a stress event that signals your body to conserve resources. Because your body considers your hair as non-essential for your survival, that’s one of the first areas that nutritional resources get diverted from. The result is increased hair loss, usually noticeable 2–4 months after starting the medication.

 

How Sudden Weight Loss Can Affect Your Hair

There are three primary factors behind the use of GLP-1s and hair loss. Here’s what they are and how a clinically-proven hair support regime like The System can help:

1. Rapid Weight Loss Can Increase Hair Shedding

Sudden or significant weight loss – regardless of how it happens – is one of the most well-documented triggers of telogen effluvium. Even if your weight loss is intentional and beneficial, your body may still temporarily prioritize essential systems (heart, brain, metabolism) over hair growth.

Weight loss causes that are known to trigger hair shedding: 

• • Bariatric surgery

  • Illness or infection

  • Postpartum hormonal shifts

  • Major dietary restriction

  • GLP-1s

Because GLP-1 medications can cause you to lose weight fast, they often cause your body to shift into a temporary hair-shedding response. You can help cushion your hair against sudden hair loss by supporting it from the outside in and the inside out with The System.

 

2. Fewer Calories Can Mean Nutritional Deficiencies

GLP-1 medications work in part by suppressing your appetite. When you shift to eating significantly less food, it can create a deficit in the amount of nutrients in your diet – especially if your meals are smaller, less frequent, or more limited in variety. 

 

 

Common nutritional deficiencies seen during rapid weight loss² include:

• • Iron – iron deficiency can trigger female pattern hair loss because it reduces oxygen levels necessary for hair follicle repair and growth. 

  • B vitamins (especially B12 and biotin) – a deficiency in these water-soluble vitamins can cause brittle, dry hair or increased hair loss. 

  • Vitamin D – insufficient vitamin D can interrupt the hair cycle, causing premature shedding (telogen effluvium) and slowing hair regrowth.

Even short-term gaps in these nutrients can signal your hair follicles to shift from the growing to the shedding phase. That’s why Arey’s core product is Not Today, Grey, because, even if you are not taking GLP-1s, it can be hard to always get all the nutrients your hair needs.

 

Can You Prevent GLP-1 Hair Loss?

The short answer is yes. I get it, it can be tempting to shed as much weight as you can, as fast as you can, but the best strategy for preventing GLP-1-related hair loss is to take it slow. Because caring for your health shouldn’t mean sacrificing your hair – and with the right approach, it doesn’t have to.

Here’s how to protect your hair from GLP-1-related hair loss:

• • Monitor your GLP-1 dose – keeping your dose low can avoid rapid weight loss and reduce the chance of systemic shock to your hair.

  • Avoid dramatic calorie reduction – make sure you eat a balanced diet with adequate daily protein intake. 

  • Correct nutritional deficiencies – a hair supplement like Not Today, Grey helps keep your iron, B vitamins, and micronutrient levels at the optimum level for hair growth and health.

  • Take care of your scalp – a daily scalp massage with Brush can improve blood flow to your scalp and boost the delivery of nutrients to your hair roots.

Scalp care is important for hair health, which is why The System includes To The Root® – an antioxidant-rich serum that nourishes your hair roots while defending your scalp skin against oxidative stress. You can read more here about the best way to use Brush to give yourself a hair-growth-boosting scalp massage. 

Arey’s The System: A Zero-Calorie Way to Support Hair Growth on GLP-1

Arey’s The System is designed to support hair growth from the inside out, without added calories, sugar, or unnecessary fillers – making it uniquely suited for people using GLP-1 medications.

Hair is one of the most metabolically demanding tissues that your body produces. Each strand is made of protein and requires a steady supply of micronutrients to grow properly. During GLP-1 use, many people can’t eat enough to meet their hair’s nutritional demands, even when they’re making healthy food choices. This is where targeted supplementation becomes essential – and where Arey’s The System fits in.

If telogen effluvium is already underway, it’s important to set realistic expectations for your hair recovery.

Here’s how the GLP-1-related hair loss cycle typically works:

• • Peak shedding occurs for a few weeks to a few months.

  • Hair regrowth starts once your system rebalances.

  • New hair growth becomes visible after 3–6 months.

Using The System helps create the conditions for healthier, stronger regrowth, even if it can’t stop shedding instantly once it has started. Think of The System as shortening the recovery window and improving the quality of hair that grows back.

 

The Good News: GLP-1–Related Hair Loss Is Usually Temporary

Experiencing hair shedding during a health journey can feel discouraging. But it’s important to remember that Telogen effluvium is not permanent hair loss. Your hair follicles are not damaged – they are simply resting. 

Three things to remember if you’re experiencing GLP-1-related hair loss:

1. Telogen effluvium is temporary.

2. Your body is adapting, not breaking.

3. Hair loss in this context is usually reversible.

Once your body adapts to your weight change, it should regain metabolic stability and your system will rebalance. That’s when your hair growth will usually restart. With the right nutritional support you can help make this transition easier on your body and hair.

 

Clinically-Proven Support for Your Hair During Weight Loss 

Arey is preferred by dermatologists more than any other anti-aging haircare brand because it is clean, clinically-proven, and gentle on your body and scalp skin. That's even more important when it comes to supporting your hair during weight loss.

You need to be able to be certain that your hair is getting the nutrients it needs at this crucial time. That's why we offer up to 25% off on all subscription orders, so you will have a constant supply to help keep your hair healthy while using GLP-1s. 

We are Arey.

Have questions? Check out our FAQ page or say hey@areygrey.com.

---

---

REFERENCES:

1. https://www.cureus.com/articles/389299
2. https://journals.sagepub.com/doi/10.1177/15598276251344827