What Is Multi-Molecular Weight Hyaluronic Acid — And Why It Works Better
Not all hyaluronic acid is created equal. The molecule size matters more than the concentration — and most moisturizers only use one weight.
B Glo was formulated differently. Here is why multi-molecular weight hyaluronic acid is the only approach worth using.
What Is Molecular Weight in Skincare?
Molecular weight refers to the size of a molecule, measured in Daltons (Da). In skincare, this determines how deep an ingredient can penetrate the skin barrier.
Large molecules sit on the surface of the skin. Small molecules pass through the outer layers and reach deeper tissue. This distinction is everything when it comes to hydration.
Why Single-Weight Hyaluronic Acid Falls Short
Most hyaluronic acid products use high-molecular-weight HA (above 1,000 kDa). This creates a plumping effect on the surface — visible and immediate, which makes for a compelling before-and-after photo.
The problem is that surface hydration evaporates. Without HA molecules reaching the dermis and epidermis, you are refilling a leaking vessel. The skin looks good for hours, then returns to baseline.
Low-molecular-weight HA (below 50 kDa) penetrates deeper but can, paradoxically, trigger an inflammatory response in some skin types when used in high concentrations without other molecular weights present to buffer it.
The Five-Weight Approach: HyloGlo™ HA Complex
The HyloGlo™ HA Complex in B Glo uses five distinct molecular weights of hyaluronic acid — each calibrated to hydrate a specific layer of the skin.
The largest molecules form a moisture-retaining film on the skin surface, preventing transepidermal water loss. Mid-range weights penetrate the outer epidermis, reinforcing the skin barrier. The smallest molecules reach the deeper dermis, stimulating the skin's own collagen and HA production over time.
The result is hydration that works from the inside out — not just a surface coat that wears off by noon.
Polyglutamic Acid: The Amplifier
B Glo also includes polyglutamic acid (PGA) alongside the five HA weights. PGA is a fermented amino acid polymer that can hold up to 5,000 times its weight in water — roughly four times more than hyaluronic acid alone.
PGA works by inhibiting the enzyme (hyaluronidase) that breaks down your skin's natural HA. The result: the HA you apply stays active longer, and your skin's own moisture reservoir rebuilds over time.
This combination is what makes visible results possible in three weeks, not three months.
What to Look For on the Label
When reading a moisturizer ingredient list, look for these terms that indicate multi-molecular weight HA is present:
Sodium Hyaluronate (high molecular weight), Hyaluronic Acid (mid weight), Hydrolyzed Hyaluronic Acid (low molecular weight), Sodium Acetylated Hyaluronate (modified weight for sustained delivery), and Polyglutamic Acid.
If you see only one of these, the product is working on one layer of your skin. If you see three or more, it is working on the full depth of the dermis — which is where lasting hydration lives.
B Glo contains all five HA weights plus polyglutamic acid, formulated by a pharmacist to address the full skin depth — not just the surface.