SenAllis Cosmetics Hyaluronic Acid Serum Duo 16 fl oz + 2 fl oz — Pure HA, Ultra-Hydrating & Fragrance-Free

SenAllis Hyaluronic Acid Serum is a concentrated humectant duo (16 fl oz refill + 2 fl oz dropper) designed to intensely hydrate skin and help minimize the look of fine lines and dryness.

This serum pairs a large refill bottle with a convenient dropper-size bottle so you can keep a travel-ready dispenser while storing the bulk supply at home. Made in the USA, the formula focuses on pure hyaluronic acid as a moisture-attracting ingredient without added fragrances, phthalates, or parabens. Bottles are plastic to avoid shipping breakage and come shrink-wrapped with inner and outer caps for secure transport.

How does this serum hydrate mature or dry skin?

Hyaluronic acid acts as a humectant, pulling and holding water at the skin's surface to improve plumpness and temporary smoothness. Regular use under a moisturizer helps skin retain moisture longer and gives a visibly softer texture.

• Contains high-concentration HA that binds moisture to the skin.
• Best used after cleansing and before your moisturizer to lock in hydration.
• Small application amount is effective — a few drops provide coverage for face and neck.

What sizes are included and how are the bottles packaged?

This set includes a large 16 fl oz refill bottle plus a 2 fl oz dropper bottle for everyday use or travel. Both bottles are made from durable plastic to reduce breakage during shipping and arrive shrink-wrapped with an inner cap and exterior cap on the larger vessel for leak protection.

• 16 fl oz refill for economical, long-term use.
• 2 fl oz dropper for precise, on-the-go dispensing.
• Plastic packaging prevents shipping damage without affecting formula stability.

Is this serum suitable for sensitive skin and how do I test it safely?

SenAllis conducted a human repeat insult patch test (HRIPT) with no reactions observed among participants, but individuals with very reactive skin may still experience sensitivity. To be cautious, try the smaller 2 fl oz bottle first and perform a patch test on a discreet area before full-face application.

• HRIPT completed; no reactions in trial participants.
• Patch test: apply a small amount to inner forearm for 24–48 hours.
• If irritation occurs, discontinue use and consult a dermatologist.

How should I apply the serum to get the best results?

A little goes a long way — use a spinning or gentle patting motion to distribute a few drops across clean skin, then follow with your moisturizer to seal in hydration. The product is formulated to be effective in small doses; over-application won’t speed benefits and can leave residue.

• Apply to cleansed, slightly damp skin for improved absorption.
• Use 2–4 drops for face and neck, then lock with a moisturizer.
• No refrigeration required; check expiration on the larger bottle.

Who this is for: This duo is ideal for anyone looking to add an economical, high-volume hyaluronic acid treatment to their routine — especially users who prefer a refill option plus a travel-friendly dropper bottle. It suits combination to dry skin types seeking non-fragranced, paraben-free hydration. If you have extremely sensitive skin, consider starting with the 2 fl oz bottle and patch testing first.

Ingredients

Distilled Water, Hyaluronic Acid, Glycerin, Phenoxyethanol, Ethylhexylglycerin, Potassium Sorbate, Citric Acid