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CARNITINE HCL.

Valuable CAS 6645-46-1 / HUMECTANT, SKIN CONDITIONING

A biologically active amino acid derivative that serves as a high-precision sebum modulator and humectant. It is particularly effective for balancing lipid production without compromising the skin's moisture barrier, making it a cornerstone for oily and acne-prone skin formulations.

Sebum Regulator Humectant Skin Conditioning Agent

Science

It functions as an essential cofactor for carnitine palmitoyltransferase I, the enzyme responsible for transporting long-chain fatty acids into the mitochondria. By promoting the beta-oxidation (metabolic breakdown) of these lipids within sebocytes, it diverts fatty acids away from sebum synthesis, physically reducing oil output at the source.


Research

High confidence
Effective range 0.5–3%
Optimal

2%

Key findings

  1. 01 A vehicle-controlled study demonstrated a 34.8% reduction in sebum secretion after 21 days of 2% concentration applied twice daily.
  2. 02 Combination therapy with 5% EGCG showed enhanced efficacy, reaching a 43.5% reduction in skin oiliness.
  3. 03 In vitro analysis confirmed concentration-dependent lipid reduction in human sebocytes via enhanced mitochondrial metabolism.

Transparency

Commonly dusted
Min. effective
1%
Red flag below
0.2%

While often listed for its 'energy' claims at trace amounts (under 0.2%), clinical sebum suppression requires a threshold of at least 1-2%. Formulations using it for oil control should be scrutinized if the ingredient appears near the bottom of the INCI list.


The Formula

Solubility
Water
Optimal pH 3.5 – 8
0 7 14

Stability

Highly hygroscopic and heat-sensitive; must be processed below 60°C to maintain integrity.

Synergies

  • Epigallocatechin Gallate (EGCG)
  • Niacinamide
  • Glycerin

Conflicts

  • Strong oxidizing agents
  • Extreme alkaline environments (pH > 8)
  • High heat (>60°C)

Safety

CIR Status
Safe as used
Max tested
3%
Pregnancy
Safe
Sensitization risk Low

Generally recognized as safe (GRAS). It is well-tolerated even by sensitive skin types due to its natural occurrence in human metabolism.


Your Skin

Yes Normal
Yes Dry
Yes Oily
Yes Sensitive
Irritancy Low
Comedogenicity Low

Our Assessment

Valuable

An exceptionally effective, non-stripping oil control agent that uses metabolic pathways rather than surface-level absorption to manage sebum.


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