Hair thinning, breakage, and slow regrowth are common concerns across the UK. With growing interest in beauty-from-within trends, consumers are turning to targeted hair growth vitamins. But which ones actually work, and what does the science say?

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The Science Behind Hair Growth Support

Hair growth is regulated by several biological factors — genetics, hormonal balance, blood flow, and nutritional status. Nutrients influence the anagen (growth) phase, support follicle strength, and defend against oxidative stress and inflammation.

Here are the most evidence-backed nutrients and mechanisms:

Biotin (Vitamin B7)

Biotin supports keratin production, a structural protein essential to hair shafts. While popular in beauty supplements, research shows benefits are most significant in people with a deficiency. A 2017 review published in *Skin Appendage Disorders* found that all reported benefits of biotin occurred in patients with underlying deficiencies due to genetic conditions, poor nutrition, or pregnancy.

Zinc

Zinc is a trace element vital for DNA synthesis, cell division, and repair — all necessary for hair follicle development. It also helps modulate sebum production, maintaining a healthy scalp. Studies have found zinc supplementation helpful in telogen effluvium and alopecia areata.

Collagen Peptides & Vitamin C

Collagen provides the amino acids proline and glycine, which support follicular structure. Ingested collagen peptides have been shown to increase skin elasticity and dermal density, indirectly benefiting hair anchorage. Vitamin C is essential for collagen synthesis and combats oxidative stress that could harm hair follicles.

Vitamin D

Low levels of vitamin D have been linked to hair loss, especially in alopecia areata. It plays a role in hair follicle cycling and immune modulation, making it important for maintaining healthy hair.

B Vitamins (B6 & B12)

These contribute to red blood cell formation and oxygen transport to the scalp, ensuring proper nutrient delivery to growing hair strands.

Certified Nutrition Hair Support Products

Collagen Beauty Shield

This premium hair-skin-nails supplement includes:

• Marine collagen (high bioavailability)
• Biotin, zinc, selenium for follicle strength
• Astaxanthin and bamboo silica to combat oxidative stress
• Hyaluronic acid for scalp hydration

Ideal for users seeking support for hair volume, skin elasticity, and nail strength.

Acai Shield+

Combines:

• Acai berry, pomegranate, grape seed — antioxidant powerhouses
• Biotin, vitamin B6, and zinc for metabolic and hormonal support
• Moringa and resveratrol for cellular regeneration

Formulated for people with lifestyle stress or environmental damage affecting hair quality.

Collagen Boost+

A comprehensive collagen powder featuring:

• Hydrolyzed collagen peptides
• Vitamin C, magnesium, glucosamine for joint and connective tissue support
• Suitable as a daily drink to support full-body collagen needs

Additional Strategies for Hair Growth

• Use a gentle, sulfate-free shampoo and avoid daily heat styling
• Incorporate scalp massage to improve microcirculation
• Ensure enough protein and healthy fat intake (e.g., omega-3s)
• Track hormonal health, particularly thyroid and androgen levels
• Avoid crash diets, which can trigger telogen effluvium

Evidence Summary & Product Match

Safe Usage & Dosage Guidelines

• Biotin: Up to 5,000 mcg/day; may interfere with hormone/lab tests
• Zinc: 10–15 mg/day ideal; do not exceed 40 mg/day
• Collagen: 5–10 g/day shown to support hair/skin/connective tissue
• Vitamin D: 1,000–2,000 IU/day unless clinically deficient

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References & Clinical Sources

• Patel, DP. “A Review of the Use of Biotin for Hair Loss.” Skin Appendage Disord. 2017
• Kil MS, Kim CW, Kim SS. “Analysis of serum zinc and copper concentrations in hair loss.” Ann Dermatol. 2013
• Proksch E. “Oral supplementation of specific collagen peptides improves skin elasticity.” J Cosmet Dermatol. 2014
• Sachdeva S. “Role of micronutrients in hair loss: A review.” Dermatol Ther. 2020

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