On average, human hair grows about 6 inches (15 cm) per year, which is roughly 0.5 inches (1.25 cm) per month.
Factors That Affect Hair Growth Rate:
1. Genetics– Some people naturally have faster-growing hair.
2. Diet & Nutrition – Protein, biotin, and vitamins (like Vitamin D & Iron) support hair growth.
3. Hair Care Routine– Avoiding excessive heat, chemicals, and frequent trims can help retain length.
4. Scalp Health– A clean, well-moisturized scalp promotes better hair growth.
5. Age & Hormones– Hair grows faster in younger people and slows down with age.
💡 Fun Fact: The fastest-growing hair type is Asian hair, which can grow slightly more than 6 inches per year, while curly or coily hair types may appear to grow slower due to shrinkage.
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