Why Is My Hair Falling Out? The 4 Most Common Causes 

Hair loss usually comes down to four causes: stress, hormones (like DHT), nutrient deficiencies, and low ferritin levels. Fixing it means supporting all four at once—balancing hormones, restoring nutrients like biotin and lysine, and improving iron utilization. That’s how you stop shedding at the source.

“Why is my hair falling out?” It’s one of the most common questions people ask—and the answer usually comes down to four core issues. The good news? Once you identify the cause, you can actually do something about it.

1. Stress and Physical Strain

When your body is under stress—whether it’s emotional stress, illness, or even intense overtraining—it starts prioritizing survival over everything else. Hair growth gets pushed to the bottom of the list.

That’s because hair follicles require steady nutrients and energy. When your system is overwhelmed, those resources get redirected elsewhere, and shedding begins.

2. Hormones (Especially DHT)

Hormonal imbalances are another major driver of hair loss.

  • Thyroid issues can slow or disrupt hair growth cycles
  • Androgens can increase activity of 5-alpha reductase, which produces DHT
  • DHT shrinks hair follicles over time, leading to thinning and shedding

This is where ingredients like saw palmetto come in—they help reduce the effects of DHT on the follicle.

3. Nutritional Deficiencies

Hair is one of the first places you’ll see nutrient deficiencies show up.

Two big ones:

  • Biotin – supports keratin production and hair strength
  • Lysine – helps with protein structure and nutrient absorption

Many synthetic forms of biotin aren’t as effective, and if you’re missing lysine, your body can’t fully utilize the nutrients needed for growth.

4. Low Ferritin (Iron Storage)**

This one gets overlooked all the time.

It’s not just about iron—it’s about iron storage (ferritin) and how well your body can use it. If iron isn’t paired with the right cofactors—like lysine and B vitamins—it doesn’t get absorbed or utilized properly.

Low ferritin = less oxygen delivered to hair follicles = more shedding.

The Fix: Supporting All Four at Once

Hair loss is rarely just one issue—it’s usually a combination. That’s why a comprehensive approach works best.

A formula like MaryRuth Daily Hair Formula targets all four areas:

  • Supports stress-related nutrient depletion
  • Helps balance hormone-related shedding
  • Provides biotin and lysine together
  • Supports iron utilization with key cofactors

Instead of guessing which issue you have, you’re covering the most common causes at the same time.

Why Is My Hair Falling Out? The 4 Most Common Causes 

Hair loss usually comes down to four causes: stress, hormones (like DHT), nutrient deficiencies, and low ferritin levels. Fixing it means supporting all four at once—balancing hormones, restoring nutrients like biotin and lysine, and improving iron utilization. That’s how you stop shedding at the source.

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