Biotin, zinc and saw palmetto: what each one does for your hair

Biotin, zinc and saw palmetto for hair: what each one does

Biotin and zinc are nutrients that contribute to the maintenance of normal hair, while saw palmetto is a traditionally used plant extract that research is still studying. Each plays a different role, which is why they appear together in many hair supplements.

When you start seeing more hair in your brush or on your pillow, it is natural to look for quick fixes. But hair changes slowly and depends on many factors: genetics, hormones, stress, sleep and diet. In this article we look at what each ingredient does, why they are often combined and what you can expect from a supplement that contains them.

Biotin: what it brings to your hair

Biotin, also called vitamin B7 or vitamin H, contributes to the maintenance of normal hair and skin and to normal energy-yielding metabolism. It is a water-soluble vitamin that the body does not store in large amounts, so it is best to get it regularly through your diet.

It is found in foods such as eggs, nuts, pulses and some whole grains. A biotin supplement is not a medicine and does not make new hair appear: its role is nutritional, and it makes most sense when your diet does not fully cover your needs, for example on very restrictive diets.

If you want to learn more about this vitamin, read our article on biotin and its properties for hair and skin.

Zinc: an essential mineral for hair

Zinc contributes to the maintenance of normal hair, skin and nails, as well as to the process of cell division and normal protein synthesis. It is an essential mineral, which means the body does not produce it and it has to come from food.

It is found in meat, fish and shellfish, pulses, seeds and nuts. People on very limited diets or poorly planned vegetarian diets may find it harder to meet their needs. Even so, more zinc is not better: you should not exceed the recommended amounts, because a sustained excess is not healthy either.

Saw palmetto: traditional use and what research is studying

Saw palmetto (Serenoa repens) is the fruit extract of a dwarf palm native to the south-eastern United States, with a long tradition of use in herbal medicine. In hair care, it is often included in supplements and cosmetics aimed at people concerned about hair density.

Some research is exploring its possible relationship with the enzyme 5-alpha reductase, which is involved in converting testosterone into DHT, a hormone associated with androgenetic alopecia. However, the available evidence is limited, and in the European Union there is no authorised health claim for saw palmetto in relation to hair.

So the sensible approach is to see it as a traditionally used botanical ingredient, not as a treatment. If you want to know where the research stands, we summarise it in our article on saw palmetto for hair.

Why they are often combined in one supplement

They are combined because they cover different aspects: biotin and zinc are nutrients with authorised claims about the maintenance of normal hair, and saw palmetto adds a traditionally used plant extract. Together they allow a more complete formula in a single dose.

Many formulas also include other supporting ingredients, such as B vitamins, folic acid, which contributes to the process of cell division, or amino acids like L-cystine, which is naturally present in hair. What matters is that the combination makes sense and that the amounts are clearly stated on the label.

How to choose a supplement with biotin, zinc and saw palmetto

Choose a formula that states the amount of each ingredient per daily dose, suits your profile and carries clear warnings. Be wary of labels that promise fast or guaranteed results.

It also helps to distinguish between formulas designed for men and for women, because their needs are not identical. For example, Xpecia Hombre combines biotin, zinc, saw palmetto extract, ginkgo biloba, vitamin B5, folic acid, L-cystine, L-methionine, keratin and soy isoflavones. Xpecia Mujer contains biotin, zinc, iron, saw palmetto extract, ginkgo biloba, vitamin B5, folic acid, L-cystine, L-methionine and keratin.

Always read the warnings: do not exceed the recommended daily dose, and talk to your doctor if you take medication, are on hormonal treatment, are pregnant or breastfeeding, or have any health condition. A food supplement is no substitute for a varied and balanced diet and a healthy lifestyle.

What to expect and when to see a dermatologist

It is reasonable to expect nutritional support, not an immediate change. The hair growth cycle lasts months, so any change in how your hair looks is assessed over the medium term and with consistency, alongside a gentle care routine: a suitable shampoo, less heat and hairstyles that do not pull.

If hair loss is intense or sudden, appears in specific areas or comes with itching, flaking or pain, see a dermatologist or doctor before starting any supplement. There may be a specific cause, such as iron deficiency or a thyroid problem, that needs a professional diagnosis.

Frequently asked questions about biotin, zinc and saw palmetto for hair

What is taking biotin and zinc for hair good for?

Biotin and zinc contribute to the maintenance of normal hair. Zinc also contributes to the maintenance of normal skin and nails and to normal protein synthesis. Taking them as a supplement makes sense as nutritional support, especially if your diet does not cover them well, but it never replaces a varied diet.

Does saw palmetto help with hair loss?

Saw palmetto is a traditionally used plant extract that some research is studying for its possible relationship with the enzyme 5-alpha reductase. The evidence is limited, and in the EU there is no authorised health claim for it in relation to hair. If hair loss worries you, see a dermatologist for a proper assessment.

How long do you need to take biotin to notice a difference in your hair?

There is no guaranteed timeframe, because the hair growth cycle lasts months and everyone is different. That is why any change in how your hair looks is assessed over the medium term, with consistent intake and without exceeding the recommended daily dose, always alongside a varied diet and a healthy lifestyle.

Which foods contain biotin and zinc?

Biotin is found in eggs, nuts, pulses and some whole grains. Zinc is found in meat, fish and shellfish, pulses, seeds and nuts. A varied diet that combines these foods helps cover your needs for both nutrients, and a supplement can offer support when your diet alone is not enough.

Can women take saw palmetto?

There are saw palmetto supplements formulated for women, such as Xpecia Mujer, which combines it with biotin, zinc and iron. Even so, read the warnings: it is not recommended during pregnancy or breastfeeding without medical supervision, and if you take anticoagulants or have any health condition, check with your doctor first.