Blood Tests to Get If You’re Experiencing Hair Thinning or Hair Loss

If you’re noticing consistent shedding, thinning, or a change in your hair density, one of the most helpful things you can do is get blood work done.

But here’s the issue: most people either do nothing, or they order a long list of tests without understanding what actually matters first.

Not every test is equally important. And not everyone needs everything at once.

So instead of guessing, here’s a simple tiered approach to blood tests for hair loss — from essential, to advanced, to optional — including what each tier costs and when you actually need it.

Tier 1: Essential Hair Loss Blood Tests (Start Here)

This is the foundation. If you are experiencing hair shedding or thinning, this is the first set of tests to do before anything else.

These tests identify the most common and most correctable internal causes of hair loss.

What to test	Name of the test
General health baseline	CBC (Complete Blood Count)
Iron status (very important for hair)	Ferritin Full Iron Panel (serum iron, TIBC, transferrin saturation)
Vitamin status	Vitamin D (25-OH) Vitamin B12 Folate
Thyroid function	TSH Free T4 Ideally add Free T3 if available

Why this tier matters

This tier helps identify the most common contributors to chronic shedding, including:

• low iron stores (even without anemia)
• thyroid imbalance
• vitamin D deficiency
• low B12/folate
• anemia or blood abnormalities

Many people find the cause of their shedding here — and the best part is that these are often fixable.

Estimated cost

➡️ USD $80 – $250
(Varies depending on country and lab pricing)

Hair thinning looks different for everyone, here’s a look into my personal experience: How Long It Took Me to Manage My Hair Loss with Androgenetic Alopecia

Tier 2: Hormonal Hair Loss Tests (Add If Thinning Is Patterned or Progressive)

If your shedding isn’t just “general hair fall” but feels patterned or progressive — such as:

• widening part
• thinning at the crown
• thinning around temples
• hormonal acne
• irregular cycles
• menopause transition symptoms

…then you may need a deeper hormonal look.

What to test	Name of the test
Hormonal Panel	Total Testosterone Free Testosterone DHEA-S SHBG (Sex Hormone Binding Globulin) Estradiol Progesterone Prolactin (optional but useful in some cases)
Minerals	Zinc

Why Tier 2 matters

Hormones influence hair cycle behaviour and can trigger thinning patterns that don’t always show up in Tier 1 blood work.

This tier is especially relevant for:

• women in their 30s–50s
• postpartum hormonal shifts
• perimenopause/menopause
• suspected androgen-related thinning

Zinc is included here because it can contribute to shedding, but deficiency is less common and testing accuracy varies by lab — so it’s best treated as an “advanced add-on,” not a universal essential.

Estimated cost

➡️ USD $120 – $400

Tier 3: Optional Deep-Dive Testing (If Results Are Normal but Hair Loss Continues)

If Tier 1 and Tier 2 come back normal but shedding continues, this tier can help uncover broader internal stressors that may indirectly affect hair growth.

What to test	Name of the test
Metabolic health	HbA1c Fasting glucose
Inflammation	CRP (C-reactive protein)
Optional General Baseline	CMP (Comprehensive Metabolic Panel) (optional but useful)

Why Tier 3 matters

Hair follicles are sensitive to internal inflammation and metabolic stress. While these tests don’t always directly explain hair loss, they can provide valuable context when the more obvious causes are ruled out.

Tier 3 is best used when you want a deeper health picture rather than a quick answer.

Estimated cost

➡️ USD $20 – $120

(CMP may raise the price slightly depending on lab)

How to Actually Approach This (Most Important Part)

You do NOT need to do everything at once.

Here is the most practical order:

Step 1: Start with Tier 1, this is where the majority of actionable findings happen.

Step 2 - Add Tier 2 only if your pattern suggests hormones, or if Tier 1 results are normal but thinning continues.

Step 3: Add Tier 3 only if you need deeper answers, this tier is optional and best used when you want a full-body health view.

Once you’ve assessed your results, supporting your scalp with a consistent, performance-led routine becomes the next step. → Shop The Formulated Products Bundle Designed to support scalp health, reduce breakage, and strengthen hair over time.

Realistic Total Cost Breakdown

Depending on how far you go:

• Tier 1 only (essential baseline): $80 – $250
• Tier 1 + Tier 2 (most thorough hair-focused workup): $200 – $650
• Full workup (Tier 1 + 2 + 3): $220 – $750+

Costs vary widely by country, whether you use public vs private labs, and whether your doctor bundles tests.

What If Everything Comes Back Normal?

This is more common than people expect.

If your blood work is normal, your hair loss may still be caused by:

• androgenetic alopecia (genetic thinning)
• age-related shortening of the hair growth phase
• chronic stress history
• postpartum baseline shifts
• scalp inflammation that doesn’t show clearly on labs

This is where the focus shifts to long-term scalp support and realistic expectations.

For a realistic breakdown of what hair loss can and cannot be reversed, read:
The Truth About Reversing Your Hair Loss

The Bottom Line

If you’re dealing with hair thinning or shedding, the goal is not to test everything — it’s to test in the right order, with the right priorities.

Start simple.
Start with Tier 1.
Then expand only if necessary.

This approach saves time, money, and confusion — and gives you the clearest path to understanding what your hair is actually responding to.

Recommended Reading

• Hair Shedding vs. Hair Fall
• The Truth About Reversing Your Hair Loss
• What I Recommend When a Client Comes to Me With Hair Thinning and Hair Fall
• How Long It Took Me to Manage My Hair Loss with Androgenetic Alopecia