PDT 色氨酸是目前能通過閉合皮脂, 達到控油, 清除痤瘡, 收緊毛孔的效果最強治療方法之一。過度活躍的皮脂腺(油腺)會導致毛孔多余油脂建成並導致粉刺和毛孔擴大。色氨酸是天然存在的必需氨基酸, 它和核黃素(維生素B2)存在於許多常見的食品中, 對我們維持身的健康起著必要的作用。我們的 PDT 色氨酸利用色氨酸和核黃素(維生素B2)與光的協同作用來達到效果。一旦皮膚接觸到含有色氨酸和核黃素的液題,低級光會開始代謝從而產生色氨酸和核黃素活性氧(ROS)。這個過程被稱為光動力反應過程。 ROS會讓皮脂腺的濃度比皮膚的其余部分更高,從而阻止皮脂腺(油腺)和導致痤瘡的細菌產生。




Acne Skin is a common skin disease that affects most people at some time during their lives. It is characterized by mild acne known as blackheads and whiteheads, semi-severe inflammation acne called papules and pustules, or severe acne known as nodules and cysts. Acne affects the areas of skin with the densest population of oil (or sebum) producing gland called sebaceous gland. The exact underlying causes of acne are not yet fully understood. However, in general, there are three recognized factors for the development of an acne lesion. These factors are: Overgrowth of sebaceous gland called follicular epidermal hyperproliferation; Excess sebum production; Presence of bacteria called P. acne. There are three factors that may independently initiate follicular epidermal hyperproliferation, including excessive production or hypersensitivity to male hormones called androgens, secretion of inflammatory biochemical signals such as IL-1α, and/or decreased content of linoleic acid in sebum. Sebum production is regulated by a number of hormones such as androgens, insulin-like growth factor, growth hormone, and vitamin D3. Increased levels of and/or increased sensitivity to androgens, insulin-like growth factor, growth hormone, and inflammatory signals are thought to cause acne. IL-1α is an inflammation-inducing signal involved in our body’s immune defense against infection. IL-alpha, when administered in skin tissue, causes follicular epidermal hyperproliferation leading to acne. Any low-grade inflammation, such as food sensitivity and mild dysbiosis in gut may cause acne via systemic release of IL-1α. Change in composition of sebum is known to occur prior to onset of acne, notably a decrease in linoleic acid content. Clinical studies have demonstrated that successful retinoid therapy normalizes linoleic acid content in sebum. Traditionally dermatologists believed that there is no causative relationship between diet and acne. Very recently, however, several clinical studies suggest that diet may change composition of sebum (oil) and may reduce the number of acne lesions. P. acne is normal bacteria that is found on healthy skin. It only causes acne when pores are occluded by sebaceous plug. Therefore antibiotic therapy targeting P acne alone is often not long lasting. Acne appears to be a result of the web-like, interconnected nature of physiologic processes, diet, and lifestyle, requiring an integrated therapeutic approach in order to attain the desired clinical results. A successful treatment should address all involved factors. Our acne treatment programs have been tremendously successful, effectively treating from blackhead to severe inflammatory acne lesions, often without oral medications.


Skinlife in Vancouver provides TRYPTOPHAN Photodynamic Acne Therapy (PDT) for acne skin. Tryptophan PDT is one of the most effective therapies to clear acne and shrink enlarged pores by shutting down sebum (oil) production. Over-active sebaceous gland (oil gland) causes excessive oil built-up in the pore and leads to acne and pore enlargement. Tryptophan is a naturally occurring essential amino acid. Our tryptophan PDT uses the synergistic reaction of light, tryptophan ,and riboflavin (Vitamin B2). Both tryptophan and riboflavin are naturally occurring substances commonly found in many foods and are necessary for our body to maintain health. Once a proprietary liquid of tryptophan and riboflavin is applied to the skin, low level light is used to metabolically produce reactive oxygen species (ROS) from tryptophan and riboflavin. This process is called a process called photodynamic reaction. ROS accumulates at a higher concentration in oil glands than in the rest of the skin. ROS deactivates both sebaceous glands (oil glands) and acne-causing bacteria.

  • What are the advantages of Tryptophan PDT over other acne treatments?
    Tryptophan PDT uses all natural substance to treat acne by reducing oil production in overactive oil glands on the skin. The skin’s reaction to the treatment is generally mild. In contrasts to Levulan PDT, tryptophan PDT does not requires sun avoidance as the tryptophan rapidly disappears from the skin within a few hours after the treatment. Redness and/or darkening of the skin seen in Levulan PDT is essentially absent in tryptophan PDT.
  • Is the treatment painful?
    There is absolutely no pain or discomfort during the treatment.
  • How long does the procedure take?
    Tryptophan PDT takes only 35 minutes from the start to the end.






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