🧠 Hair loss is a signal, not a diagnosis · Precision Health w PA Courtney

🧠 Hair loss is a signal, not a diagnosis

Alright...Let’s talk about hair loss without the fluff, the fear-mongering, or the $79 shampoo.

🧠🧬Hair is a biological receipt of what’s happening inside your body. When it starts thinning, shedding, or ghosting your scalp, something upstream is usually off.

Here’s the science-backed breakdown you can actually use.

🧠 First: Hair loss is a signal, not a diagnosis

Common patterns we see:

• Diffuse shedding (stress, nutrients, hormones)

• Thinning at temples/crown (often DHT-driven)

• Patchy loss (autoimmune, alopecia areata)

• Brittle, slow growth (thyroid, iron, protein, estrogen deficiency)

Translation: the follicle is reacting, not misbehaving.

🧬 Nutrient deficiencies strongly linked to hair loss

These show up over and over in labs:

Iron / FerritinLow ferritin = hair follicles go into “energy conservation mode.”

Target ferritin for hair regrowth is often >50–70 ng/mL, not “barely normal.”

Food sources:

🥩 red meat

🦪 oysters

🌱 lentils + vitamin C pairing

Protein

Hair is literally keratin (a protein). Chronic under-eating = shedding.

Food sources:

🍳 eggs

🐟 fish

🥩 poultry, beef

🧀 Greek yogurt

Zinc

Needed for follicle repair and growth signaling.

Food sources:

🦪 oysters (again—hair MVP)

🥩 beef

🎃 pumpkin seeds

Biotin & B-vitamins

Important—but not magic alone. Low levels usually reflect gut or absorption issues, not diet alone.

Food sources:

🥚 egg yolks

🥑 avocado

🌰 nuts & seeds

Vitamin D

Low D = follicles stuck in the “rest phase.”

Food sources:

☀️ sunlight

🐟 fatty fish

🥚 egg yolks

🔄 DHT: the hairline assassin

DHT (dihydrotestosterone) shrinks follicles in genetically susceptible people—especially at the temples and crown.

What increases DHT conversion?

• Insulin resistance

• Chronic stress (cortisol upregulates 5-alpha reductase)

• Low estrogen or progesterone balance

• Poor liver detoxification

Foods that may support healthier androgen balance:

🥦 cruciferous veggies (broccoli, cauliflower)

🫒 olive oil

🍵 green tea

🥬 leafy greens

This is not about “blocking testosterone”—it’s about metabolic balance.

🔥 Root causes we look for clinically

If hair loss is persistent, think deeper than supplements:

• Thyroid dysfunction (even “subclinical”)

• Post-viral or post-stress shedding (hello, telogen effluvium)

• Perimenopause hormone shifts

• Gut inflammation or poor absorption

• Chronic under-fueling / over-training

• Autoimmune activity

Bottom Line...

Fix the root. The hair usually follows. 🌱

More on labs, hormones, and functional strategies coming—because bald panic deserves better science.

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