Cutting the Supply Lines: A Metabolic Approach to Angiogenesis & Metastasis — and How Food Helps Tip the Balance Back

By Debbie Sweeney, BCHN, FDN-P, ONC

Two of the original hallmarks of cancer describe the moment a tumor stops being a local problem and becomes a systemic one: inducing angiogenesis (recruiting its own blood supply) and activating invasion and metastasis (spreading to distant tissue).12 Metastasis — not the primary tumor — is responsible for the large majority of cancer-related deaths.3 In the terrain model, neither of these is a random accident. Both are behaviors a tumor learns from the conditions around it. Change the conditions, and you change the incentives — that is the whole premise of terrain over tumor.

Angiogenesis: the tumor builds its own roads

A cluster of cancer cells can only grow to roughly 1–2 mm before it outstrips the oxygen and nutrients that reach it by simple diffusion. To grow beyond that, it has to recruit new blood vessels — angiogenesis. Judah Folkman first proposed in 1971 that tumor growth is angiogenesis-dependent, and that cutting off the blood supply could itself be therapeutic.4.

The switch is largely driven by low oxygen. Hypoxic tumor cells stabilize a transcription factor called HIF-1α, which turns up vascular endothelial growth factor (VEGF) and related signals that call in new vessels. This “angiogenic switch” flips surprisingly early — even in pre-invasive lesions.2 The vessels a tumor builds are leaky and disorganized, which paradoxically deepens hypoxia in pockets of the tumor and feeds the cycle forward.

Metastasis: the invasion cascade

Metastasis is not one event but a sequence — the invasion–metastasis cascade: local invasion → intravasation (entering blood or lymph) → survival in circulation → extravasation (exiting into a distant tissue) → colonization.3.

To begin, epithelial tumor cells often undergo epithelial–mesenchymal transition (EMT), loosening their attachments and becoming mobile. They secrete matrix metalloproteinases (MMPs) that dissolve the surrounding matrix, clearing a path. A carbohydrate-binding protein called galectin-3 then helps circulating tumor cells clump together, adhere to vessel walls, and lodge in new tissue. Two things are worth holding onto: the cascade is inefficient (most escaped cells die), and its final step — building a macrometastasis — again depends on angiogenesis to raise a blood supply at the distant site. The two

The metabolic thread that connects them

Here is where the metabolic approach earns its name. Both angiogenesis and metastasis are fueled by a shared set of terrain conditions — which means one strategy can influence both.

• The Warburg effect. Many tumors ferment glucose to lactate even when oxygen is available.5 That lactate acidifies the microenvironment, and an acidic, lactate-rich terrain is pro-angiogenic, pro-invasive, and immunosuppressive.
• Hypoxia. Low oxygen drives HIF-1α, which simultaneously ramps up VEGF (angiogenesis) and nudges cells toward the mobile, invasive EMT state (metastasis).
•  Insulin and IGF-1. A diet that keeps blood sugar and insulin chronically high sustains proliferative signaling (PI3K/Akt/mTOR) that supports both new-vessel growth and invasion.
• Chronic inflammation. Inflammatory signaling (NF-κB, COX-2) is a shared accelerant for vessels and for spread.

This is the logic of terrain over tumor: the same conditions that let a tumor build its roads also help it travel them. Winters and Higgins Kelley organize this biology into the Ten Terrains, where circulation and angiogenesis appear as one terrain in their own right.6.

Bringing the body back into balance

No food “cures” cancer, and nothing here replaces oncology care. But the terrain that favors angiogenesis and metastasis is, in real part, a terrain we set at the table. Four levers do most of the work.

1. Steady the blood sugar
   The single most powerful metabolic lever most people actually control is glycemic load. Building meals around non-starchy vegetables and clean protein — and removing grains, legumes, and added sugar — lowers the insulin and IGF-1 signaling that supports both hallmarks. In the MamaSweeney framework this is the 75/25 plate: roughly three-quarters non-starchy vegetables to one-quarter quality protein.
2.  Lower the inflammatory background
   Wild-caught fish and pastured or grass-fed protein, generous marine omega-3s, no industrial seed oils, and low-and-slow cooking to minimize advanced glycation end products (AGEs) all pull inflammatory tone downward — quieting a shared driver of both processes.
3. Feed in the anti-angiogenic foods
   A large body of preclinical and epidemiological work has identified dietary compounds that dampen VEGF-driven vessel growth.7 Green tea catechins (EGCG), berry anthocyanins and ellagic acid, cruciferous sulforaphane, turmeric/curcumin, and marine omega-3s are among the best characterized. Human clinical-trial evidence is still limited — so think supportive terrain, not standalone therapy.
4. Add targeted anti-metastatic support (clinician-guided)
   Modified citrus pectin (MCP) binds galectin-3 and reduced tumor growth, angiogenesis, and metastasis in animal models.8 The strongest human data so far comes from a phase II prostate-cancer study, where PectaSol MCP (4.8 g, three times daily) improved PSA doubling time.9 EGCG’s inhibition of MMPs and omega-3s’ anti-invasive effects fit the same rationale. These belong inside a coordinated plan — not a self-directed one.

The same table, used earlier: prevention

The most encouraging part of this biology is that the terrain levers are identical whether we are trying to prevent an angiogenic switch or slow one already flipped. An anti-angiogenic, low-glycemic, anti-inflammatory pattern of eating is not exotic — it is a vegetable-forward, whole-food, low-sugar way of eating that a healthy person can hold for decades.7 For prevention, the emphasis shifts from intensity to consistency:

• Make non-starchy vegetables the base of most plates — aim for variety and color, because the pigments are the point.
• Choose wild-caught fish and pastured/grass-fed protein; skip seed oils and ultra-processed foods.
• Keep added sugar and refined starch low to protect insulin sensitivity.
• Drink green tea; use herbs and spices (turmeric, garlic, rosemary) generously.
• Store food in glass, cook low-and-slow, and keep the gut and microbiome well-fed with fiber-rich plants.

Terrain at a glance

Read this as two lists: what tends to feed vessels and spread, and what tends to shift the terrain the other way. In the house color logic, rose marks a primary driver to reduce and teal marks a support to add.

An honest word on the evidence

Most of the food-specific data above is mechanistic (cell and animal studies) or epidemiological. That evidence is encouraging and biologically coherent — but it is not the same as randomized proof that any single food halts angiogenesis or metastasis in a person. Early-phase clinical trials of several of these strategies — ketogenic diets, green tea catechins, curcumin — are underway, though most are small and measure surrogate markers rather than survival. The honest framing is this: these choices move the terrain in a favorable, low-risk direction, while formal outcome trials remain limited. Nutrition here is complementary — it works alongside, and never instead of, the oncology team’s plan.

And here is what makes this an easy decision: unlike a drug, a whole-food, vegetable-forward, low-sugar way of eating carries no toxicity and no real downside. Set the cancer question aside entirely and it still improves blood sugar, cardiovascular health, energy, and resilience — for someone working to prevent disease and for someone in active treatment alike. That makes it a genuine no-regrets choice: at worst, you have simply eaten in a way that supports whole-body health; at best, you have also made the terrain less hospitable to the very processes described here.

One important caveat, though: well-nourished must mean nutrient-dense — not severely restricted, but equally not padded with empty calories. During active treatment, protecting weight and strength is a genuine priority, and unintended weight loss is a real risk. But the answer is calorie-dense whole food — quality fats like olive oil, avocado, and pastured animal fats, alongside ample protein — not ice cream, sugary shakes, or an “eat whatever adds pounds” approach. Loading sugar onto the plate to hold weight feeds the very glucose, insulin, and inflammatory drivers described in this article: it can move the scale while working directly against the terrain. Weight targets and any nutrition-support decisions belong with your care team.

References

1.  Hanahan D, Weinberg RA. The hallmarks of cancer. Cell. 2000;100(1):57-70.
2. Hanahan D, Weinberg RA. Hallmarks of cancer: the next generation. Cell. 2011;144(5):646-674.
3. Valastyan S, Weinberg RA. Tumor metastasis: molecular insights and evolving paradigms. Cell. 2011;147(2):275-292.
4.  Folkman J. Tumor angiogenesis: therapeutic implications. N Engl J Med. 1971;285(21):1182-1186.
5.  Warburg O. On the origin of cancer cells. Science. 1956;123(3191):309-314.
6. Winters N, Higgins Kelley J. The Metabolic Approach to Cancer: Integrating Deep Nutrition, the Ketogenic Diet, and Nontoxic Bio-Individualized Therapies. Chelsea Green Publishing; 2017.

7.  Li WW, et al. Tumor angiogenesis as a target for dietary cancer prevention. J Oncol. 2012;2012:879623.

8. Nangia-Makker P, et al. Inhibition of human cancer cell growth and metastasis in nude mice by oral intake of modified citrus pectin. J Natl Cancer Inst. 2002;94(24):1854-1862.

9. Keizman D, et al. Modified citrus pectin treatment in non-metastatic