Why Vitamins Matter for Hair Growth
Hair is a rapidly growing tissue that depends on consistent nutrient delivery. Vitamin deficiencies, particularly in B-complex, D, and iron, can lead to breakage and thinning. A 2022 review in the Journal of Cosmetic Science confirmed that balanced micronutrient intake improves both hair density and shine.
Key Vitamins for Hair Growth
Biotin (Vitamin B7): Enhances keratin structure and strengthens hair shafts. Daily doses between 2,500–5,000 mcg are commonly recommended.
Vitamin D: Regulates follicle cycling and reduces inflammation. Deficiency has been linked to alopecia areata and telogen effluvium.
Iron: Essential for oxygen transport to follicles; even mild anemia can trigger shedding.
Vitamin E and C: Protect follicles from oxidative stress and improve scalp blood flow.
Best Vitamin Supplements in 2025
Top dermatologist-endorsed brands include formulations with marine collagen, zinc, and antioxidants. Products like Nutrafol and Viviscal continue to lead in clinical trials, showing measurable improvement in thickness after 90 days.
Dietary Sources for Natural Support
Include eggs, nuts, salmon, spinach, and citrus fruits in your diet for naturally bioavailable nutrients. Avoid over-supplementation—excess vitamins can disrupt metabolism and lead to toxicity.
Dermatologist Tip
“Vitamins are supportive tools, not replacements for medical therapy,” says Dr. Jonathan Reyes. “They work best alongside minoxidil, finasteride, or natural DHT blockers for optimal results.”
