Many cancer patients worry that supplements containing antioxidants might stimulate angiogenesis — the formation of new blood vessels — hence “feed” their tumors.

Understanding how these work in the body can help you make sense of the concerns about angiogenesis.

Angiogenesis: Two Very Different Pathways

Angiogenesis is the process of forming new blood vessels. The same term describes very different processes depending on the context:

Physiological angiogenesis (normal tissue repair):

• Triggered by mild, localized signals in response to tissue injury or stress.
• Key regulators include VEGF-A, FGF-2, and angiopoietins, which act under tight cellular control.
• Supported by antioxidants that reduce oxidative stress, protecting endothelial cells and enabling proper vessel formation.

Pathological angiogenesis (tumor angiogenesis):

• Triggered by strong, continuous signals from tumor cells, including VEGF, HIF-1α, and PDGF.
• Results in uncontrolled blood vessel growth, often leaky and abnormal.
• Supports tumor oxygenation, nutrient supply, and metastasis.

Key difference: Normal angiogenesis is regulated and beneficial, while tumor angiogenesis is uncontrolled and cancer-driven. (Carmeliet P., Nature, 2005)

How Kiseki’s Antioxidants Regulate Angiogenesis

Kiseki’s antioxidants — from fermented green papaya, seaweed, berries, and turmeric — influence angiogenesis through cellular redox regulation, gene expression modulation, and inflammatory pathway control.

a) Oxidative Stress Modulation

• Reactive oxygen species (ROS) are critical signals for angiogenesis.
• Excessive ROS can promote pathological angiogenesis in tumors.
• Antioxidants in Kiseki scavenge ROS, protecting endothelial cells in normal tissues while limiting oxidative stress that drives tumor angiogenesis.

Evidence:

• Curcumin reduces ROS-mediated VEGF expression in tumor cells while supporting healthy endothelial function (Kunnumakkara AB et al., Cancer Letters, 2017).
• Berries and green papaya polyphenols also act as ROS modulators in endothelial cells (Abotaleb M et al., Frontiers in Oncology, 2024).

b) Regulation of VEGF Signaling

• In healthy tissues, VEGF-A is expressed transiently during repair.
• Kiseki antioxidants help normalize VEGF signaling, ensuring angiogenesis occurs in a controlled manner.
• In tumor tissues, VEGF is overexpressed due to cancer signaling; Kiseki’s antioxidants do not amplify tumor VEGF and may even inhibit ROS-driven VEGF overexpression.

Evidence:

• Curcumin inhibits VEGF transcription in cancer cells while supporting VEGF-dependent repair in normal cells (Aggarwal BB et al., Biochemical Pharmacology, 2007).
• Fucoidans in seaweed regulate endothelial cell proliferation without promoting tumor angiogenesis (Ale MT et al., Marine Drugs, 2011).

c) Anti-inflammatory Pathways

• Chronic inflammation contributes to tumor angiogenesis.
• Kiseki antioxidants reduce pro-inflammatory cytokines (e.g., TNF-α, IL-6) in normal tissue, supporting repair without fueling tumor progression.

Evidence:

• Turmeric’s curcumin inhibits NF-κB signaling, a pathway that promotes both inflammation and VEGF-mediated tumor angiogenesis (Shishodia S., Cancer Letters, 2007).
• Berry polyphenols reduce endothelial activation and oxidative stress while maintaining normal angiogenesis (Wang LS et al., Journal of Agricultural and Food Chemistry, 2011).

Pathway Summary: Why Kiseki Supports Healthy Tissue Without Feeding Tumors

1. Controlled VEGF Activation: Supports transient angiogenesis in normal tissue repair.
2. ROS Modulation: Protects endothelial cells and limits tumor-promoting oxidative stress.
3. Anti-inflammatory Effects: Reduces signals that could enhance tumor angiogenesis.
4. Targeted Effect: Antioxidants act on healthy tissues, while tumor angiogenesis is controlled by cancer-driven pathways that Kiseki does not activate.

Analogy: Kiseki is like a gardener watering the healthy flowers in your body. The weeds (tumors) already have their own irrigation system and strong signals. Kiseki nourishes only the flowers, not the weeds.

Final takeaway – Scientific Consensus

• Normal angiogenesis: beneficial, regulated, supported by antioxidants.
• Tumor angiogenesis: uncontrolled, driven by cancer cells, not nutrients or antioxidants.
• Antioxidants in Kiseki: promote physiological angiogenesis, protect cells from oxidative damage, and do not amplify tumor growth.

References:

1. Abotaleb M et al., Frontiers in Oncology, 2024; 14:1050000. PMID: 38611849

2. Aggarwal BB et al., Biochemical Pharmacology, 2007; 74:1505–1520. PMID: 17637419

3. Ale MT et al., Marine Drugs, 2011; 9:2106–2130. PMID: 21994774

4. Carmeliet P., Nature, 2005; 438:932–936. PMID: 15902242

5. Kunnumakkara AB et al., Cancer Letters, 2017; 391:1–12. PMID: 17382479

6. Shishodia S., Cancer Letters, 2007; 245:177–189. PMID: 17337324

7. Wang LS et al., J Agric Food Chem, 2011; 59:12379–12388. PMID: 21361463