Hair, Skin and Nails: A Science-Led Guide to What Actually Helps

Hair, Skin and Nails: A Science-Led Guide to What Actually Helps

By Olivia Buckley, co-founder of Supp and BSc Biomedical Science

Key Takeaways

• Genetics, age, hormones, sleep, and stress dictate how your hair, skin, and nails look far more than any single product.
• A handful of nutrients have genuinely well-evidenced roles, including biotin, zinc, and vitamin C.
• Biotin works wonders if you are actually deficient, but loading up on excess amounts won’t give you superhero hair.
• Hair and nails grow slowly. Committing to a steady, simple routine for a few months matters more than a flashy quick-fix.

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Every mum knows the feeling of looking in the bathroom mirror and wondering when, exactly, your skin decided to turn a shade of exhausted grey.

Maybe you’re currently clearing a dishearteningly large clump of hair out of the shower drain or wrestling with nails that split every time you try to buckle a car seat.

When you’re deep in the trenches of motherhood, your body is operating on a survival budget. Between broken sleep, the mental load of managing a household, and those days where lunch is just cold toddler crusts and a third cup of coffee, your body has to make executive decisions about where its resources go.

Unsurprisingly, growing thick hair, maintaining strong nails, and giving your skin a radiant glow are low on your body’s priority list. It redirects those vital nutrients to your vital organs instead.

The good news? They are incredibly responsive to proper care. While no supplement is a magic wand, the right nutrients do play a massive supporting role. As a biomedical scientist, I’m here to tell you that you don’t need an expensive, high-maintenance beauty regime that you’ll abandon by next Tuesday. You just need to give your body the basic raw materials it needs to rebuild.

What’s Actually Controlling Your Hair, Skin & Nails?

Before you buy into any viral TikTok beauty trends, it helps to understand the three distinct factors at play:

1. The Uncontrollables (Genetics & Age): Your baseline hair thickness and how your skin ages are largely hardwired into your DNA.
2. The Fluctuators (Hormones): Whether you are postpartum, perimenopausal, or just dealing with regular monthly cycles, hormonal shifts dictate tissue behaviour.
3. The Controllables (Nutrition & Stress): This is where you can actually make a difference. Every single new skin cell, strand of hair, and nail bed is physically constructed from the nutrients you consume.

Supplements cannot rewrite your genetics, nor can they magically grant you eight hours of uninterrupted sleep. What they can do is act as a low-effort safety net, ensuring that even on your most frantic days, your body has the baseline building blocks required for repair.

The Evidence: The Nutrients Worth Your Time

The beauty industry loves to invent complex new ingredients, but European food safety standards only recognise a handful of vitamins and minerals for their proven structural benefits.

If you want real results, these are the heavy hitters to look for:

Nutrient	What It Does For You	The Scientific Reality
Biotin	Main structural support for hair and skin.	Essential for producing keratin. It works wonders if your levels are depleted by stress or poor diet, though extra won’t give you superpowers if you’re already optimal [1].
Zinc	Repairs tissues and controls cell renewal.	Acts as a repair mechanic for brittle nails and angry breakouts, while protecting cells from daily environmental stress [2].
Vitamin C	The engine behind collagen production.	Your body cannot build the scaffolding that keeps skin firm and bouncy without it [3].
Vitamins A & Iodine	Manage skin cell turnover.	They help your skin shed dead cells efficiently, preventing that dull, flaky texture.
B Vitamins (B6, B12, Folate)	Reduce fatigue and support energy.	They won’t make your hair grow overnight, but they keep you functioning when sleep is a distant memory.

Where a Supplement Actually Fits

If you have a cupboard full of giant, chalky multivitamin tablets that you haven’t touched in six months, you’re not alone. The biggest reason supplements fail to deliver results isn’t the formulation – it’s compliance. Mum-brain is real, and if a routine feels like a chore, it gets dropped.

When we developed our Hair, Skin & Nails Gummies, we deliberately designed them to solve that exact problem. We packed biotin, zinc, vitamin C, and ten other essential nutrients into a simple, vegan, raspberry-flavoured gummy.

Let’s be completely honest: a gummy format isn’t medical magic. But it is a habit you will actually stick to. Leaving a bottle of great-tasting gummies next to the kettle means you’ll remember to take them while making your morning coffee. That effortless consistency is what ultimately moves the needle.

Consistency > Complexity 

A simple routine you actually do always beats a 10-step routine you skip

Setting Realistic Expectations

Because hair and nails grow slowly, typically only about a centimetre a month for hair, any nutritional changes you make today will take time to show up on the outside.

Be sceptical of any product promising a transformation in a week. Give your body two to three months of steady, daily support before you evaluate the results.

A Note on Medical Changes: If you are experiencing sudden, patchy, or dramatic hair loss, or severe skin changes, put down the supplements and speak to your GP. These can be signs of underlying thyroid issues or iron deficiencies that require proper medical attention.

Free Daily Habits That Help

The most powerful things you can do for your skin and hair won’t cost you a penny:

• Hydrate: Drink a large glass of water as soon as you wake up, before you let caffeine dehydrate your skin.
• Lower the heat: When your hair is already fragile from hormonal shifts, step back from aggressive heat styling and tight hairstyles that strain the roots.
• Eat your protein: Hair and nails are made of protein (keratin). If you aren’t eating enough protein, your body can’t build them, no matter how many vitamins you take.
• Prioritise rest: Sleep and stress levels show up on your face faster than almost anything else.

Motherhood takes an immense toll on your body’s physical reserves. By shifting your focus from complicated, external quick-fixes to simple, consistent internal support, you give your hair, skin, and nails exactly what they need to recover on their own terms.

References

1. A Review of the Use of Biotin for Hair Loss. Skin Appendage Disorders, 2017.
2. The Role of Zinc in Cell Growth, Repair and Antioxidant Defence. International Journal of Molecular Sciences review, 2022.
3. The Roles of Vitamin C in Collagen Synthesis and Tissue Repair. Systematic review, 2018.

Guest Article.