If you’ve been exploring botanical actives for your DIY skincare, you’ve likely come across the term HG extract on an ingredient label. Herniaria glabra extracts are worth getting to grips with, because these ready-to-use botanical extracts make it genuinely straightforward to add powerful plant actives to your formulas without specialist equipment or advanced chemistry knowledge. This guide covers the five main HG extract variants, what they do, and how to use them confidently in your next batch.

What Is Herniaria Glabra and Why Does It Matter in Natural Skincare?

The plant behind the extract

Herniaria glabra, commonly called smooth rupturewort, is a low-growing perennial herb native to Europe and parts of Asia. It has a long history in European herbal medicine as a plant with notable astringent and anti-inflammatory properties, and that heritage is exactly why cosmetic formulators adopted it as a base for botanical extracts. Its saponin-rich profile helps active compounds disperse evenly in water-based systems, making it an ideal carrier for other botanicals.

In cosmetic ingredient terms, the Herniaria glabra plant contributes skin-conditioning and mild astringent benefits. When used as a base, it creates a stable, water-soluble matrix that other botanical actives, lavender, tea tree, rosemary, white willow bark, rooibos, can be absorbed into during the extraction process.

How HG extracts are made

HG extracts are produced by combining the Herniaria glabra base with a secondary botanical through a standardised extraction process. The result is a concentrated, water-soluble liquid containing both the HG base and the co-botanical’s active compounds. Because the work is already done, you receive a single ingredient that’s ready to drop into your water phase. No maceration, no filtering, no solvent handling, just a clean, predictable active to work with.

This matters a lot for home formulators and small-batch makers. At DIY Naturally, we stock botanical extracts specifically because our customers, from first-time makers to small-batch entrepreneurs, want the benefits of active botanicals without the complexity of sourcing raw plant material and extracting it themselves.

Meet Five HG Extract Variants: What Each One Brings to Your Formula

Lavender HG extract

Lavender is one of the most versatile botanicals in skincare, and in HG extract form its benefits work across product types. Lavender is known for its calming, anti-inflammatory, and mildly antiseptic properties. It suits sensitive, reactive, and normal-to-dry skin particularly well.

In a formula, lavender HG extract works well in facial toners, facial mists, and soothing serums. It’s a good choice when you want to address redness or irritation without introducing harsh actives. The scent contribution is present but subtle at typical usage rates.

Tea Tree HG extract

Tea tree (Melaleuca alternifolia) has well-documented antimicrobial and clarifying properties. In HG extract form, it delivers that active profile in a water-soluble, easy-to-blend format, which makes it far simpler to work with than tea tree essential oil, especially in rinse-off and water-heavy formulas.

Tea tree HG extract is best suited to oily, acne-prone, and congested skin types. It’s a natural fit for DIY facial cleansers, spot treatment serums, and scalp toners. The HG base tempers the intensity of the raw essential oil, so it’s also gentler for formulators who want the antimicrobial benefit without potential irritation from undiluted oil.

Rosemary HG extract

Rosemary is prized in cosmetic formulation for its antioxidant activity and its ability to improve circulation and brighten dull skin. Rosemary extracts contain rosmarinic acid and other polyphenols that help neutralise free radicals and support a more even skin tone over time.

Rosemary HG extract suits normal, combination, and oily skin. It performs well in serums, toners, and hair care products, particularly scalp tonics, where rosemary’s reputation for supporting healthy hair growth makes it a popular active. If you’re building an antioxidant-focused formula, rosemary HG is a strong addition.

White Willow Bark HG extract

White willow bark contains salicin, a compound that functions similarly to salicylic acid in skincare. This makes white willow bark HG extract a popular choice for oily, acne-prone, or congested skin types in gentle leave-on serums and toners. Unlike synthetic salicylic acid, salicin from white willow bark acts more slowly and is generally better tolerated, making it a friendlier option for daily-use formulas.

It suits formulators who want BHA-adjacent benefits in a natural, clean-label product. Think clarifying toners, pore-refining serums, and light exfoliating gels. Avoid combining it with other strong acids at high concentrations without patch testing first.

Rooibos HG extract

Rooibos (Aspalathus linearis) is one of South Africa’s most recognisable botanicals, and it’s a particularly meaningful ingredient for local formulators. Rooibos is rich in the antioxidant aspalathin, a flavonoid found almost exclusively in this plant, as well as quercetin and other polyphenols. These compounds help protect skin against oxidative stress, calm inflammation, and contribute to a more even, healthy-looking complexion.

Rooibos HG extract suits dry, sensitive, and mature skin well. It’s a strong choice for moisturising serums, face creams, and eye area products. For South African small-batch brands, using rooibos extract is both botanically meaningful and a compelling story for a locally conscious consumer.

How to Use Herniaria Glabra Extracts in DIY Skincare Recipes

Typical usage rates and phases

Most HG extracts are used at between 2% and 10% of the total formula weight. A usage rate of 3–5% is typical for toners and serums; you can push toward 8–10% in a rinse-off product like a cleanser where actives have less contact time with the skin. Always check the supplier’s recommended rate for the specific variant you’re using, as potency can vary.

Add HG extracts to the water phase of your formula, or, if your formula is heat-sensitive, at cool-down when the batch has dropped below 40 °C. Because they’re water-soluble, they incorporate easily with gentle stirring and don’t require emulsification. They are not suitable for the oil phase.

If you’re new to structuring formulas by phase, a beginner’s guide to skincare formulation will give you a clear foundation before you start.

Which products suit HG extracts best

HG extracts are versatile enough for almost any water-containing product:

Facial toners and mists, the most straightforward application; the extract goes directly into a water base with minimal other ingredients.
Serums, at 4–8%, HG extracts contribute meaningful active levels alongside humectants and other water-phase actives.
Face creams and lotions, add to the water phase before emulsification; they’ll distribute evenly through the finished cream.
Cleansers, use at the higher end of the range (8–10%) to compensate for rinse-off dilution.
Scalp toners and hair mists, rosemary and tea tree HG extracts are particularly well suited here.

If you want a practical recipe framework to build around, making a natural face cream at home is a useful starting point.

Blending HG Extracts with Other Natural Actives

HG extracts are designed to play well with others. They’re already water-soluble and stable across a broad pH range, so layering them with complementary actives is straightforward.

Humectants are an excellent pairing. Betaine as a humectant in skincare draws moisture to the skin’s surface and pairs well with rooibos or lavender HG for hydrating serums targeted at dry or sensitive skin. Glycerin is another simple, compatible partner.

Antioxidants extend both the formula’s stability and its skin benefits. Vitamin E oil in DIY skincare is a classic addition to any formula containing botanical extracts, it helps protect the actives from oxidation and delivers its own skin-conditioning benefits. Use it at 0.5–1% in the cool-down phase alongside your HG extract.

Botanicals with complementary actions round out targeted formulas. For example:

Rooibos + niacinamide for brightening and antioxidant support
Tea tree + zinc PCA for oil control in oily or acne-prone formulas
White willow bark + panthenol for a clarifying but still soothing serum
Lavender + allantoin for a sensitive skin toner

If your goal is a clean-label formula that avoids synthetic smoothing agents, natural alternatives to silicones in cosmetic formulas explains how to achieve a silky skin feel using plant-derived ingredients, a useful complement to any HG-based serum or cream.

Don’t overthink the combinations. Start with one HG extract and one or two co-actives, observe how your skin responds, and build from there.

Formulation Tips, Safety, and Storage for HG Extracts

pH compatibility: HG extracts are generally compatible with a pH range of 4.0–7.0, which covers most skincare formulas. If you’re building a toner or serum, aim for a pH of 4.5–5.5 to match the skin’s natural acid mantle. Use a pH meter rather than strips for accuracy.

Preservation is non-negotiable. Any formula that contains water, including toners, serums, and creams made with HG extracts, will support microbial growth without a preservative. Use a broad-spectrum preservative approved for cosmetic use, added at the manufacturer’s recommended rate. If you’re unsure which preservative to choose, natural preservatives for water-based formulas covers the main options clearly.

Shelf life and storage: Properly preserved HG extract formulas typically last 6–12 months, depending on the other ingredients and packaging. Store your finished products in airtight, opaque containers away from direct light and heat. Antioxidant boosters like vitamin E can extend stability further.

Handling the raw extract: Keep undiluted HG extracts refrigerated once opened and use them within the period specified on the packaging, usually 12 months from opening. Avoid contaminating the bottle with wet tools or fingers, as this introduces moisture and can degrade the extract faster.

These are stable, forgiving ingredients when handled with basic care. If you’re already comfortable making a toner or simple serum, adding an HG extract to your formula is a small step with a meaningful payoff, and a great way to start exploring what botanical actives can do for your skin.

Browse the DIY Naturally range of botanical extracts and actives to find the HG extract variants that suit your current formulation goals, and pick the one that matches your skin type or your target product. Once you’ve tried one, you’ll quickly see why botanical extracts have become such a staple in natural skincare formulation.