The Hair Health Bible - Root Causes & Treatment Options
If it feels like everyone you know is talking about hair loss lately, you’re not imagining it.
Over the past five years, we’ve seen a global uptick in hair shedding and thinning — post-COVID, post-stress, post-hormone shifts — it’s like the entire world’s hair collectively hit “eject.”
Between pandemic stress, hormonal chaos, nutrient depletion, toxin exposure, and aesthetic treatments that disrupt the scalp microbiome, we’ve reached a tipping point:
hair health is the newest form of skincare.
Everywhere you look, people are on a quest for thicker, fuller, more resilient hair — trying everything from rosemary oil to red light therapy to stem cells and even hair transplants.
Before you go buying a plane ticket to Turkey, here’s the truth that nobody will tell you: Hair loss isn’t the problem — it’s a symptom.
Your body is sending a message that something deeper needs support.
The Root Causes of Hair Loss
Let’s go beyond the surface and look at what’s really happening underneath.
1. Hormonal Imbalances
Hormones act like your body’s internal rhythm — and when they’re out of sync, your hair feels it first.
Common culprits:
High DHT (dihydrotestosterone): triggers androgenic hair loss in men and women, leading to a widening part line and thinning at the top (crown) of the head.
Low estrogen: post-birth control, postpartum, or perimenopause drops lead to a reduction in anagen (the growing phase), leading to a massive shed and thinning at the temples.
Thyroid dysfunction: both hypo and hyperthyroidism disrupt the hair growth cycle, increasing the exogen phase (which is a rapid shed cycle).
Cortisol: both acute and chronic stress both prematurely shift the hair follicle into exogen (shedding) and can lead to premature graying of the hair.
Integrative Support to Manage Hormones:
Run a full hormone panel (not just TSH): Free T3/T4, reverse T3, thyroid antibodies (anti-TPO, anti-TG), estradiol, progesterone, testosterone, cortisol, DHEA, and DHT.
If thyroid levels are off - work with a provider to balance them. If hormones are off, I wouldn’t run to birth control, I would run to herbal support to balance the highs and lows off each hormone. If cortisol is high, I would consider adaptogens.
My topadaptogens for hair health are: ashwagandha, rhodiola, and holy basil.
I absolutely recommend working with a Naturopathic Doctor of functional medicine doctor and getting to the root cause as hormonal shifts often do play the biggest role when it comes to hair health.
2. Nutrient Deficiencies
Your hair is one of the last tissues to receive nutrients — your body prioritizes survival first. If your diet or absorption is off, your hair will reflect it.
Top deficiencies linked to hair loss: Iron (specifically low ferritin), zinc, vitamin D, B12, folate, and amino acids.
Integrative Support:
Aim for 30g of protein per meal (keratin needs amino acids). General rule of thumb is at least half of your body weight in grams of protein a day, but I still think that isn’t enough and I am for at least 100+g of protein a day for hair health.
Include collagen, amino acids (building blocks of protein), and omega-3s.
Test ferritin (aim for 50-70) and replenish under guidance of a healthcare provider.
3. Stress & Cortisol Dysregulation
Stress-induced hair loss is real.
Chronic stress elevates cortisol, which can push follicles prematurely into the “shedding” phase and disrupt thyroid conversion.
Support:
Prioritize rest and nervous system repair.
Supplement with magnesium, B vitamins, and vitamin C to rebuild adrenal resilience.
Incorporate daily parasympathetic practices: meditation, nature, deep breathing.
4. Gut Health & Absorption
Your gut determines how well you absorb nutrients.
If you’re dealing with dysbiosis, leaky gut, or chronic inflammation, your hair might be starving — even if your diet looks perfect.
Support:
Run a comprehensive stool test (I prefer GI MAP or Jona) and work with a functional medicine provider who is well educated in interpreting stool tests (I’ve had wayyyy too many patients come to me after their doctor ran a test and didn’t know how to interpret it).
Eradicate any unwanted bacteria in the gut first to reduce the source of dysbiosis. Alternatively test for any potential food sensitivities that are creating inflammation in the gut.
Rebuild with L-glutamine, colostrum, zinc carnosine, bone broth, digestive enzymes and the correct probiotic .
Too often I see people taking the wrong probiotic! Don’t waste your money - test your gut to find out exactly what strains your gut needs.
Support digestion with mindful eating and minimize distractions at mealtimes.
5. Scalp Health & Topical Care
Your scalp is living skin — and it needs care just like your face. This gets neglected ALL the time.
Try:
Weekly scalp massages with rosemary or peppermint oil.
Gentle exfoliation to remove buildup and increase circulation.
Avoid sulfates and silicones that suffocate follicles.
The Best Foods for Hair Growth
Here are the most well-studied foods for promoting stronger, thicker strands:
1. Salmon and Sardines
Rich in omega-3 fatty acids and vitamin D, which reduce inflammation, support scalp circulation, and strengthen hair shafts.
2. Eggs
A powerhouse of protein, biotin, and sulfur — all essential for keratin production and follicle health.
3. Pumpkin Seeds
Contain zinc, iron, and plant-based DHT-blockers that help reduce androgen-related hair thinning.
4. Spinach and Swiss Chard
High in iron, magnesium, and folate — all crucial for oxygenating hair follicles and maintaining strong strands.
5. Berries
Loaded with vitamin C and antioxidants that protect follicles from oxidative stress and boost collagen production.
6. Avocado
Full of vitamin E and healthy fats to nourish scalp tissue and maintain moisture balance.
7. Lentils and Chickpeas
Offer plant-based protein, iron, and zinc to support the growth and repair cycle of hair.
8. Nuts (especially Brazil nuts and Walnuts)
Provide selenium, which supports thyroid function, plus omega-3s to keep hair shiny and strong.
9. Sweet Potatoes
Packed with beta-carotene, which converts to vitamin A — key for healthy sebum production and scalp hydration.
10. Seaweed and Nori
Rich in iodine and trace minerals that support thyroid health and optimal follicle metabolism.
Treatments for Hair Growth: What Works (and What to Know)
Modern medicine has given us a buffet of hair growth treatments — but not all are created equal. Here’s a balanced look through both a scientific and integrative lens.
Minoxidil (Rogaine)
Yes, it can work — but it’s a commitment for life.
It stimulates follicles by increasing blood flow, but once you stop, shedding often rebounds (because it doesn’t fix the root cause).
Think of it as a band-aid — not a long-term solution.
PRP Injections (Platelet-Rich Plasma) *my favorite!
Uses your own blood plasma, rich in growth factors, to stimulate dormant follicles.
When done correctly and in a healthy individual, PRP can be powerful — especially for early-stage hair thinning.
Best results come when paired with nutrient repletion, hormonal balance, and scalp care.
Red Light Therapy (Low-Level Laser Therapy)
One of my favorite non-invasive tools, but consistency is key for this one.
Red light (650–850 nm wavelength) has been shown to stimulate mitochondrial energy in hair follicles, improving density and reducing shedding.
Use 3–4x/week for 10–20 minutes for best results.
Exosomes & Stem Cell Therapy
Cutting-edge and promising.
These regenerative therapies use growth factors and cellular messengers to reactivate follicles and repair scalp tissue.
They’re best used in clinics specializing in regenerative medicine and can be incredibly synergistic when combined with PRP and internal support.
The Integrative Roadmap to Stronger, Healthier Hair
Test, don’t guess. Functional labs reveal your true deficiencies and imbalances.
Rebuild your foundations. Protein, minerals, and hormone support first.
Support your stress response. Heal your nervous system daily.
Heal your gut and scalp. Nourish both your inside and outside.
Add advanced therapies if needed. PRP, red light, and exosomes can amplify results once your body is supported.
My Favorite Hair-Supporting Essentials
Supplements I LOVE for Hair Health:
ARMRA Colostrum - this is essential for supporting gut health and reducing inflammation. Bonus points as it’s a powder and tastes amazing.
Designs for Beauty Marine Collagen - hair specific marine collagen with biotin that has the building blocks for keratin production
Needed Stress Support - simple, yet effective formula for managing daily stress
Nutrafol Hair Growth Nutraceutical: this stuff actually works and has been put through multiple clinical trials indicating a faster growth rate and increase in density. My #1 choice if I had to pick anything for hair health.
Hair + Scalp Care Favorites:
Rosemary scalp oil - I prefer making your own at home with a few drops of rosemary essential oil into argan or jojoba oil and leave on the scalp for at least 30-60 minutes before showers.
Clean, sulfate-free shampoo + conditioner: I love the Vegamour Gro line or Purador DHT blocking shampoo/conditioner
Final Thoughts
Being concerned about hair loss doesn’t make you vain — it’s your body’s message that something deeper needs attention.
If you want to get to the root cause of your hair loss or support your hair health deeper, I’m always available for consultations.
Your hair is your body’s way of saying: “I’m thriving.”