What Vitamins are Good for Hair Growth and Thickness?

If you've noticed more hair shedding than usual or your hair feeling thinner over time, you're not alone. Sometimes, lifestyle changes on their own aren't enough to make a noticeable difference to hair health, which is where supplements can come in.

Supplements help provide key nutritional vitamins that the body may be lacking. Essential nutrients like biotin and zinc play an important role in supporting the normal hair growth cycle, helping hair stay strong, healthy and resilient over time. Understanding what vitamins are good for hair growth and how they work in the body is an important step towards supporting healthier-looking strands.

Why vitamins matter for hair growth

Hair is made primarily of a protein called keratin, which the body produces using nutrients from the food we eat. Nutrient-rich foods such as fatty fish (a source of vitamin D), spinach (rich in iron) and citrus fruits (high in vitamin C) all help support the body's natural production of keratin.

These nutrients are delivered to the hair follicles through the bloodstream. However, when levels of key vitamins and minerals needed to produce keratin drop, the hair growth cycle can become disrupted. This may lead to increased shedding or slower regrowth over time.

Key vitamins for hair growth and thickness

Biotin (Vitamin B7)

Biotin, also known as Vitamin B7, plays a vital role in helping the body convert food into energy. It also supports the way the body processes proteins (amino acids), which are essential building blocks for hair structure. Biotin for hair loss is a common vitamin many turn to for maintaining normal hair growth, along with supporting healthy skin and nails.

Zinc

Zinc is an essential mineral that the body cannot produce on its own and is obtained from our diet. It plays a key role in supporting healthy hair growth by helping with keratin production, maintaining normal follicle function and supporting scalp health.

It also contributes to cell repair and regeneration, which is important for the continuous growth cycle of hair. When zinc levels are low, hair can become weaker, more brittle and more prone to shedding.

Collagen

Collagen is a structural protein that supports the skin, muscles, tendons and many other connective tissues. It contains amino acids that support the body's overall protein production, including proteins involved in hair structure such as keratin.

Collagen plays a role in supporting several processes linked to healthy hair, including maintaining the hair growth cycle and helping protect cells from oxidative stress, which can contribute to hair ageing and breakage. Collagen also supports scalp and follicle health by providing essential amino acids, which may result in a stronger, healthier scalp over time.

Can vitamins help with hair thinning?

Vitamins are not a quick fix for hair loss, but they can support normal hair growth when nutritional deficiencies are part of the issue. Hair grows in cycles, and improvements from nutritional support usually take several months to become noticeable. Consistency is key, alongside a balanced diet and healthy lifestyle habits.

For those experiencing persistent or unexplained hair thinning, it's important to consider underlying causes such as hereditary conditions, stress, hormonal changes or medical conditions before relying on supplementation alone. If hair loss continues or worsens, it's advisable to seek medical advice to help identify any underlying issues and appropriate treatment options.

How to support hair health through nutrition

Supporting hair growth through vitamins works best as part of a wider routine. Simple steps include:

Eating a balanced diet rich in protein, fruits and vegetables
Staying hydrated to support normal body function
Avoiding restrictive diets that may limit essential nutrients
Maintaining consistent supplement use where appropriate
Managing stress, which can impact the hair growth cycle

Choosing the right support for your hair

For those looking to support healthier hair as part of a wider wellness and haircare routine, adding a targeted supplement may help. Viviscal Healthy Hair Vitamins for Men and Viviscal Healthy Hair Vitamins for Women are scientifically formulated with nutrients such as biotin and zinc to support normal healthy hair growth from within, alongside the proprietary collagen complex AminoMarC™ designed to help nourish hair at its core.

Backed by over 25 years of research and supported by seven clinical trials, Viviscal is trusted by many looking to support stronger, healthier-looking hair. To learn more, explore our FAQs or get in touch with our team for further guidance.