Your hair is among the first to reveal an internal imbalance.

The problem? A "normal" result doesn't guarantee that your body has everything it needs to support growth and limit hair loss.

Because hair health is not measured by normal values but by truly optimal levels for your follicles.

 

"Normal" doesn't mean "optimal"

Standard blood tests are designed to detect serious pathologies, not to assess whether your body has everything it needs to grow healthy hair.

Result: your levels may be within the normal range but still insufficient for your follicles.

 

Optimal values for hair

Iron

Ferritin:

• Normal: 15-150 ng/mL
• Optimal for hair: > 70 ng/mL Below 30 = often a cause of hair loss

Serum Iron:

• Normal: 50-170 µg/dL
• Optimal for hair: around 100-120 µg/dL

Transferrin:

• Normal: 200-360 mg/dL
• Optimal for hair: in the lower normal range High levels = may indicate iron deficiency, even if serum iron appears normal

Vitamins and Minerals

Vitamin D (25 OH):

• Normal: 30-100 ng/mL
• Optimal for hair: > 40 ng/mL < 20 = deficiency, very common

Vitamin B12:

• Normal: 200-950 pg/mL
• Optimal for hair: 500 pg/mL

Folate B9:

• Normal: 4-18 ng/mL
• Optimal for hair: ≥ 10 ng/mL

Zinc:

• Normal: 700-1200 µg/L
• Optimal for hair: > 900 µg/L

Thyroid Panel

TSH Thyroid:

• Normal: 0.4-4.0 mIU/L
• Optimal for hair: between 1.0 and 2.5 mIU/L > 3.5 can be a sign of functional hypothyroidism (possible hair loss)

Free T3 (FT3):

• Normal: 3-6 pmol/L
• Optimal for hair: in the upper third of the normal range (around 5-6 pmol/L)

Free T4 (FT4):

• Normal: 10-25 pmol/L
• Optimal for hair: also in the upper third (around 18-22 pmol/L)

 

Hormonal Panel

Total Testosterone:

• Normal: 0.1-0.8 ng/mL
• Optimal for hair: < 0.5 ng/mL

LH / FSH:

• Depends on cycle day, useful for detecting PCOS
• Optimal LH/FSH ratio for hair: close to 1
• If LH > 2x FSH ⟶ suggestive of PCOS

DHT (Dihydrotestosterone):

• Normal: 250-990 pg/mL
• Optimal for hair: < 500 pg/mL

Estradiol (E2):

• Normal: 20-200 pg/mL
• Optimal for hair: > 80 pg/mL

Prolactin:

• Normal: 5-25 ng/mL
• Optimal for hair: < 15 ng/mL

Progesterone:

• Normal: 1.7-27 ng/mL
• Optimal for hair: > 10 ng/mL

Here's what you can do concretely

If your blood work is normal but your hair is still falling out, don't stop there. It may be useful to:

→ Ask your doctor for more precise reference ranges (not just "normal/abnormal")

→ Consider a micronutritional approach to explore what standard tests don't show

→ Support your scalp externally, while you work internally

The role of our Anti-Hair Loss Serum No.1

While you rebalance your system in depth, your scalp needs immediate support. Our Anti-Hair Loss Serum No.1 acts directly where it matters: its 0.2% caffeine stimulates scalp microcirculation, while Redensyl™, Capixyl™, and Baicapil™ work synergistically to densify and strengthen the hair fiber.