Hair loss is usually a symptom, not the problem.
If you’ve noticed more hair in your brush, shower drain, or ponytail, the first question shouldn’t be, “What supplement should I take?”
It should be:
“Why is my hair falling out?”
At Flow Wellness, we see hair loss almost every day. Sometimes the cause is iron deficiency. Other times it’s thyroid disease, hormones, rapid weight loss, nutritional deficiencies, stress, genetics, or medications.
The good news is that many causes of hair loss are treatable.
The key is identifying what’s driving it.
The Most Important Step: Find the Cause First
Healthy hair depends on healthy hair follicles.
Hair follicles are among the fastest-growing tissues in your body. Because they require so much energy and nutrition, they’re often one of the first places to show that something is wrong.
When your body is under stress or missing key nutrients, it shifts resources toward more important organs. Hair growth becomes less of a priority.
That’s why treating hair loss isn’t just about finding the right shampoo or vitamin.
It’s about understanding what’s happening inside your body.
The Most Common Causes of Hair Loss
Hair loss is rarely caused by just one thing.
Common contributors include:
- Iron deficiency or low ferritin
- Thyroid disorders
- Low vitamin D
- Low vitamin B12
- Hormonal changes during perimenopause or menopause
- Polycystic ovary syndrome (PCOS)
- Rapid weight loss
- Inadequate protein intake
- Chronic stress
- Certain medications
- Genetics
Many patients have several contributing factors at the same time.
For example, someone taking a GLP-1 medication may also be eating too little protein and have low iron stores. Addressing only one issue may not produce the results you’re hoping for.
GLP-1 Medications and Hair Loss
Yes, hair loss can happen while taking GLP-1 medications—but we don’t yet totally know exactly why.
Medications like tirzepatide and semaglutide have been associated with an increased risk of hair loss. However, researchers are still trying to determine whether the hair loss is caused by the medication itself, the rapid weight loss it produces, reduced calorie and protein intake, nutritional deficiencies, or a combination of all of these factors.
A 2026 systematic review and meta-analysis of nine clinical trials involving 4,114 participants found that GLP-1 receptor agonists were associated with a more than threefold increased risk of hair loss compared with placebo. Even so, hair loss remained relatively uncommon, affecting about 3.9% of patients overall.
The reassuring news is that this type of hair loss is usually temporary. In most cases, the hair follicle remains healthy, and hair begins growing again once the body adapts and nutritional needs are met.
At Flow Wellness, we work to reduce this risk by helping patients:
- Lose weight at a steady pace instead of as quickly as possible.
- Prioritize adequate daily protein.
- Monitor iron and vitamin levels.
- Correct nutritional deficiencies early.
- Support healthy hair with targeted supplements when appropriate.
We don’t recommend stopping your GLP-1 medication simply because of hair shedding. For most patients, the metabolic and cardiovascular benefits of treatment far outweigh the temporary risk of hair loss, especially when we address the underlying contributors.
Before You Buy Hair Supplements, Check Your Labs
Lab work often provides answers that supplements alone cannot.
At Flow Wellness, we commonly evaluate:
- Ferritin and iron studies
- Complete blood count (CBC)
- Comprehensive metabolic panel (CMP)
- Thyroid function (TSH, Free T4, and sometimes Free T3)
- Vitamin D
- Vitamin B12
- Hormone levels when clinically appropriate
Many patients tell us they were previously told their labs were “normal.” But, normal doesn’t always mean optimal, and it doesn’t always explain why you’re losing hair. Looking at your symptoms together with your lab results often tells a much more complete story.
Flow Wellness Grow Vitamins Support Healthy Hair Growth
Supplements work best after you’ve addressed the underlying cause.
That’s why we often recommend Grow Vitamins at Flow Wellness as part of a comprehensive hair restoration plan.
Our Grow formula contains vitamins, minerals, and nutrients that support healthy hair growth by providing the building blocks your hair follicles need to produce strong, healthy strands.
While no supplement can correct untreated iron deficiency, thyroid disease, or hormonal imbalance, giving your body the boost of nutrients it needs can help maximize regrowth once those underlying issues are being treated.
Remember, though, that hair grows slowly. Most people need three to six months of consistent nutrition before they begin noticing meaningful improvement.
When Should You See a Medical Provider?
Don’t ignore persistent hair loss.
Schedule an evaluation if:
- Hair loss started suddenly.
- You’re losing large amounts of hair every day.
- Your hairline is rapidly changing.
- You notice bald patches.
- Hair loss is accompanied by fatigue, weight changes, irregular periods, or other new symptoms.
- Hair shedding continues for more than three months.
The sooner you identify the cause, the sooner you can begin the right treatment.
Hair Loss Is Treatable
The best treatment depends on why you’re losing your hair.
For some people, replacing iron is enough.
Others need better nutrition, more protein, thyroid treatment, hormone optimization, or vitamin replacement.
Many benefit from adding high-quality vitamins after those issues are addressed.
There isn’t one magic product that works for everyone.
There is, however, a systematic approach that gives you the best chance of restoring healthy hair.
At Flow Wellness, that’s exactly where we start.
Frequently Asked Questions
What blood work should I get for hair loss?
A good starting point includes a CBC, ferritin, iron studies, thyroid function, vitamin D, vitamin B12, and a comprehensive metabolic panel. Depending on your symptoms, hormone testing may also be helpful.
Will my hair grow back?
In many cases, yes. Hair loss caused by nutritional deficiencies, thyroid disease, stress, rapid weight loss, or temporary medication effects often improves once the underlying cause is corrected. Because hair grows slowly, visible improvement usually takes several months.
Can tirzepatide or semaglutide cause hair loss?
Possibly. Current research shows an association between GLP-1 medications and hair loss, but it’s still unclear whether the medication itself, rapid weight loss, reduced food intake, nutritional deficiencies, or all of these factors are responsible.
Do hair vitamins really work?
They can help if your hair follicles have the nutrients they need to grow. However, supplements work best after identifying and treating the underlying cause of hair loss.
Ready to Find the Cause?
If you’re experiencing hair loss, don’t spend months guessing.
Your hair may be telling you something important about your health.
Contact your Flow Wellness provider today. We can evaluate the most common causes of hair loss, order the right lab work, review your results, and recommend a personalized plan that may include nutrition, supplements, hormone optimization, or other treatments to help support healthy hair growth.
