The MOST Dangerous Diseases in the World (& They Don’t Give You Symptoms)

Berg recommends adding hypoxia training to exercise routines. This involves deliberately creating low-oxygen states while working out, mimicking the effects of climbing a mountain or high-altitude environments. He claims this floods tissues with oxygen, clears inflammatory pockets, and re-awakens bodily areas that have felt starved of oxygen for years. Moreover, he predicts it can eliminate sleep apnea, likely by conditioning the respiratory musculature and central chemoreceptors. While athletes already use altitude training for endurance and repair, Berg suggests it will become a transformative health practice for the general population.

Berg illustrates that normal blood sugar is about 80 mg/dL—equivalent to one teaspoon of sugar in all your blood—yet the average person consumes far more per meal. The pancreas compensates by secreting insulin, which acts like a vacuum cleaner, rapidly pulling sugar out of the blood and converting it into fat. This hyperinsulinemia deposits fat in the abdomen, organs, and liver. For 15-20 years the system holds sugar in check, with only subtle signs like belly fat and fatigue. Eventually the insulin-producing cells become exhausted and insulin sensitivity drops, first causing pre-diabetes and later full type 2 diabetes. He insists this is not a genetic inevitability but a direct consequence of chronic dietary sugar load.

Berg lists the silent progression timelines: high blood pressure can be symptom-free for 10-20 years; type 2 diabetes for 15-20 years; liver disease often requires 75% damage before symptoms emerge; kidney disease may reach 90% loss of function before noticeable symptoms appear; atherosclerosis typically stays hidden until arteries are 70% blocked; and colon cancer can reach stage 4 without any signs. He emphasizes that waiting for symptoms is a grave mistake, especially for kidney disease where late-stage diagnosis means dialysis with little chance of reversal. The body's incredible reserve capacity allows survival on a fraction of organ function, lulling people into a false sense of security.

Berg argues that the current medical approach treats symptoms—pain, high blood pressure, high blood sugar—as problems to be turned off with pharmaceuticals. This eliminates the warning signals that might prompt deeper investigation. Over time, people accept later symptoms as normal aging: fatigue, stiffness, blood pressure that is ‘normal’ because everyone is on medication, nighttime urination, belly fat, sugar cravings, and frequent hunger. By dismissing these as inevitable, both patients and doctors miss the opportunity to intervene on the root causes. He contrasts this with the idea that symptoms are messengers pointing to metabolic dysfunction that can be corrected with lifestyle.

Berg describes hypoxia training as deliberately creating low-oxygen conditions during exercise, similar to climbing a mountain. He says this practice, already used by athletes to boost fitness and repair, can push oxygen into tissues that haven't felt proper oxygenation for a long time, flushing out inflammation. Additionally, he claims it can eliminate sleep apnea, likely by conditioning the respiratory system. While not yet widely adopted, he positions it as a powerful add-on to standard exercise for anyone with inflammatory issues or sleep-disordered breathing.

Berg highlights low vitamin D as a root cause of high blood pressure, cancer, autoimmunity, and cardiovascular disease. Vitamin D boosts nitric oxide, which relaxes blood vessels and lowers pressure, and preserves insulin function, extending the window before insulin resistance develops. However, he notes that vitamin D resistance—a state of reduced biological response—can shorten that window. To compensate, he advises taking more vitamin D rather than less, framing it as a necessary overshoot to ensure benefit. This concept reframes vitamin D dosing from absolute serum targets to functional sufficiency.