Does type 2 diabetes cause hair loss?

Yes, type 2 diabetes can contribute to hair loss through several mechanisms: impaired circulation to hair follicles, chronic inflammation, hormonal imbalances, and nutrient deficiencies. However, hair loss is rarely caused by diabetes alone—it's often a combination of factors that should be evaluated together.

Can high blood sugar damage hair follicles?

Elevated blood sugar can damage the small blood vessels that supply hair follicles with nutrients and oxygen. Over time, this vascular damage may cause follicles to shrink, produce thinner hairs, or stop producing hair altogether. Controlling blood sugar levels can help protect follicular health.

Can hair loss from diabetes grow back?

In many cases, yes. If hair loss is primarily due to telogen effluvium (stress-related shedding) or nutritional deficiencies associated with diabetes, addressing these underlying issues often allows hair to regrow within 6-12 months. However, if follicles have been damaged by long-term poor circulation, regrowth may be limited.

What blood tests help rule out other causes?

A comprehensive evaluation typically includes: HbA1C, fasting glucose, complete blood count (CBC), ferritin, TSH, Free T4, Free T3, vitamin D, B12, and zinc. For women, a hormone panel including testosterone and DHEA-S can also be helpful. Your clinician can tailor testing based on your specific symptoms and history.

Can metformin or diabetes meds cause hair loss?

Metformin is not commonly associated with hair loss, but it can reduce B12 absorption over time, and B12 deficiency can contribute to hair thinning. Some diabetes medications may have hair loss as a rare side effect. If you notice changes after starting a new medication, discuss with your prescriber—don't stop taking it without medical guidance.

Can Diabetes Cause Hair Loss? Causes, Patterns, and What Helps

Hair loss can have many causes. Learn how blood sugar and metabolic health may play a role, what patterns to watch for, and what to discuss with a clinician.