Top 3 Science-Backed Ingredients for Hair Growth (Supplements, Minerals & Herbs)

At Sonderbeaut, we know hair growth is never about quick fixes, it’s about supporting your follicles from the inside out with ingredients backed by science and real user experience. Hair growth relies on nutrients, hormonal balance, and healthy follicles. No single ingredient is a miracle, but research shows that certain supplements, minerals, and herbs can help support stronger, thicker hair over time.

1. Biotin (Vitamin B7): The Keratin Booster

Biotin is one of the most frequently studied nutrients for hair health because it plays a key role in producing keratin, the protein that makes up your hair. While true biotin deficiency is rare, supplementation has been shown to improve hair thickness, reduce shedding, and support growth, especially when paired with other nutrients like zinc and amino acids.

What it does: Supports keratin production and strengthens hair structure
Who it’s best for: Thinning hair, brittle hair, and those with nutrient gaps

2. Saw Palmetto: A Natural DHT Modulator

Saw palmetto is an herbal extract that may help block DHT (dihydrotestosterone), a hormone linked with hair thinning in both men and women. Clinical studies suggest that saw palmetto (when taken orally or applied topically) can improve hair density and reduce shedding by supporting a healthier hormonal environment around hair follicles.

What it does: Helps reduce hormonal triggers of hair loss
Who it’s best for: Androgenic thinning or pattern hair loss

3. Zinc: The Mineral That Repairs & Protects

Zinc is a crucial trace mineral for tissue repair, immune function, and follicle maintenance. Deficiency is linked to increased shedding and slow growth, while supplementation can help strengthen hair and support scalp health. Zinc works best when balanced with other nutrients, and it frequently appears in hair-focused supplements alongside biotin and other vitamins.

What it does: Supports tissue repair, hormone balance, and follicle health
Who it’s best for: Anyone with thinning or slow-growing hair

Beyond the Top 3: A Holistic Perspective

Many users also report benefits from other supportive ingredients like marine collagen (amino acids for hair structure), vitamin D (follicle activity), and plant-based antioxidants; but biotin, saw palmetto, and zinc consistently show up in evidence-based studies and consumer reviews as core players in a hair-growth regimen.