How to read skincare ingredient labels: A simple guide for safe & effective choices

Understanding skincare ingredient labels can be challenging, especially when you’re looking for products that are safe during pregnancy, postpartum, or for sensitive skin. The ingredient list is your most reliable source of truth, but only if you know how to read it.

This guide will walk you through the key principles so you can make confident, informed decisions about what goes on your skin.

1. Focus on the first few ingredients

Ingredients are listed in order of highest to lowest concentration. The first 3–5 ingredients typically make up most of the formula, so start here when evaluating a product.

For example:

• Water, aloe vera, or glycerin near the top indicates a hydration-focused base.
• Oils listed early suggest a richer, more emollient texture.

Once concentrations drop below 1%, brands can list ingredients in any order.

2. Fragrance-free and unscented are not the same

• Fragrance-free: No added fragrance ingredients.
• Unscented: May still include masking agents to neutralise odours, which can irritate sensitive skin.

If you have reactive skin, scan the label for hidden fragrance components even when a product claims to be unscented.

3. Natural does not always mean gentle

While plant-based ingredients can be beneficial, some essential oils, botanicals, and plant extracts may trigger irritation, particularly if your skin is more sensitive during pregnancy. Always consider patch testing new products before regular use.

4. Check the position of hero ingredients

If a product promotes a specific active, such as Vitamin C, Bakuchiol, or Hyaluronic Acid, check where it appears on the label:

• High on the list: More likely present in a meaningful concentration.
• At the bottom: May be included for marketing appeal rather than significant impact.

5. Be aware of common irritants

If you are prone to sensitivity or experiencing hormonal skin changes, take extra care to identify:

• Synthetic fragrance
• Citrus or peppermint oils
• Harsh alcohols (e.g., denatured alcohol high on the list)
• Sulphates in cleansers

Minimising these can help reduce the risk of irritation.

The Siren way...

We believe in complete ingredient transparency and using clinically proven actives in meaningful concentrations. Every ingredient we select serves a purpose, to deliver results without unnecessary irritants or marketing 'fillers'. No fluff. 

Learning to read skincare ingredient labels is one of the most effective ways to choose products that support your skin’s needs. Focus on the first few ingredients, verify active concentrations, and be mindful of potential irritants to make the best choices for your skin.