These pregnancy mistakes will ruin your baby's health! You need to know this! Hubert Czerniak and...

Czerniak argues that the period before conception is at least as important as the pregnancy itself, because it is during gametogenesis that the epigenetic marks are established. He points to data showing that a father’s metabolic health directly shapes sperm DNA methylation and offspring metabolic outcomes. For the mother, being replete in nutrients prevents the ‘parasitic’ draw of the fetus from leaving her depleted and sick post‑partum.

His protocol includes a battery of tests: fasting insulin (aiming for <8 µIU/mL), fasting glucose (<95 mg/dL), optional oral glucose tolerance test with insulin at 1 hour no more than 4× fasting, homocysteine (to assess methylation and B‑vitamin status), full thyroid panel (TSH, fT3, fT4), sex hormones at specific cycle days (estradiol in the follicular phase, progesterone in the luteal phase, FSH/LH ratio on day 3‑4, testosterone, androstenedione, prolactin), vitamin D (25‑OH), serum levels of zinc, selenium, copper, and toxic metals (arsenic, lead, cadmium), and genetic testing for MTHFR polymorphisms. He also checks male fertility parameters, noting that modern lifestyle factors like carrying phones in pockets can already depress sperm quality.

Diet‑wise, both partners adopt an animal‑based, nutrient‑dense low‑carbohydrate framework, eliminating refined vegetable oils, sugar, and processed foods. Supplements include high‑DHA fish oil, choline (unless eating at least 4 eggs/day), a B‑complex with methylfolate and methylcobalamin (not synthetic folic acid or cyanocobalamin), vitamin C, iodine, selenium, zinc, magnesium, and vitamin D3. The goal is to reach a state where all markers are optimal and both partners feel excellent before attempting conception.

Czerniak rejects the standard 60% carbohydrate pregnancy diet taught in universities, calling it a recipe for gestational diabetes and postpartum metabolic disease. He uses the fetal glucose demand data (5 g/day in trimester one, rising to 75 g/day at term) to argue that even very low carbohydrate intakes are sufficient because maternal gluconeogenesis covers the rest.

His wife followed this approach: no grains, sugars, or industrial seed oils. She ate eggs, liver, beef, marrow, butter, fish, and moderate amounts of low‑glycemic vegetables and berries. As pregnancy progressed, she occasionally added small amounts of oats, buckwheat bread, or fruit, following her body’s signals. He stresses that the diet should not be forced — if the mother craves a specific whole food, that likely indicates a genuine need.

He adds that the most dangerous element is not the occasional fruit but the chronic consumption of hidden linoleic acid and sugar from processed foods. He encourages mothers to think in terms of nutrient density per calorie rather than hitting a carbohydrate quota, and to prioritise foods like egg yolks and liver. For those who dislike liver, he suggests freezing ground liver in ice cube trays and sneaking a cube into minced meat dishes — undetectable but powerful.

Czerniak and his wife adopted BLW after extensive research. On her second day of solids, their daughter was already gnawing on strips of liver. The core principle is that the baby chooses what and how much to eat from a selection of safe, whole foods. He emphasizes that children often reject a food the first two exposures but devour it on the third, so persistence is key.

They deliberately avoided all jarred baby foods, which he says are cooked at high temperatures, destroying nutrients, and loaded with fillers. Even organic jars often contain fruit concentrates that spike insulin and condition a sweet tooth. They also did not give rice crackers, corn puffs, or other processed baby snacks that would displace nutrient‑dense calories.

For gluten introduction, they waited until 8 months and gave a piece of sourdough rye bread. They also introduced moderate amounts of oats and quinoa over time, but their daughter’s diet remains predominantly animal‑based. He is not dogmatic about ketogenic diets for children; if the child is metabolically healthy and active, some complex carbohydrates are fine.

Czerniak originally thought the optimal 25‑OH vitamin D range was 100‑200 ng/mL, but after observing patients with autoimmune and neurological conditions, he revised it upward. He reports that patients with TSH as high as 100 µIU/mL were asymptomatic — full energy, sharp cognition — while on this protocol, and their thyroids regenerated volume over time. He claims he has seen the gland recover even from a single remaining follicle.

He is concerned about the widespread use of levothyroxine, citing a 1967 study (possibly by Wolfe) suggesting that euthyrox combined with iodine increased breast cancer risk in women. Without endorsing avoidance of necessary medication, he argues that early intervention with nutrients can often prevent the need for lifelong hormone replacement.

This is a slow process: the body needs time to remodel tissue and re‑establish homeostasis. He advises measuring not just TSH but fT3, fT4, and antibodies, and using the protocol only when there is ample time (e.g., a year before planned pregnancy). During the healing phase, he says the person sleeps well and regenerates, rather than suffering from typical hypothyroid brain fog.

Czerniak stresses that a natural birth was a priority for them. They hired a private midwife who understood their wishes and ensured that the cord was not clamped until it stopped pulsating, that the baby was placed immediately on the mother’s chest for skin‑to‑skin, and that breastfeeding began within the first two hours. He mentions the ‘lotus birth’ concept (leaving the placenta attached until it dries and falls off spontaneously) but notes they did not attempt it; they did, however, achieve full placental transfusion.

He emphasizes the importance of the vaginal microbiome: babies born via cesarean miss out on this initial bacterial inoculation, which sets the stage for immune and metabolic health. If cesarean is necessary, he advises parents to ask about or arrange for vaginal seeding by having a gauze soaked in maternal vaginal fluids and wiping the baby’s skin and mouth. He laments that this knowledge is not standard in many hospitals.

The private midwife also acted as a buffer against the standard hospital protocols that might have pushed for early cord clamping, formula supplementation, or separation of mother and baby. Czerniak considers this a critical investment in the child’s lifelong health.

Czerniak is alarmed by the subtle cultural push to equate breastfeeding with formula feeding. He notes that even in medical settings, young parents get the message that formula is equally good. He strongly disagrees, citing the unquantifiable complexity of breast milk — live cells, antibodies, oligosaccharides, and hormones — that no industrial product can mimic.

He advises mothers to prioritise nutrient density during lactation, continuing the same supplements as in pregnancy (omega‑3, choline, B‑vitamins, iodine, zinc, vitamin D3). His wife kept this protocol and never experienced the lactation crises common among poorly nourished mothers. If a mother does have supply issues, he recommends consulting a private lactation consultant, who can diagnose latching problems or other mechanical issues that simple dietary changes cannot fix.

He also warns that stopping breastfeeding too early — especially before 6 months — and switching to formula exposes the infant to the oxidized vegetable oils and sugars he earlier condemned, plus removes the immunological protection that reduces colds and infections. In his long‑term observation, children’s health frequently declines after weaning if the solid diet is not carefully managed.

Czerniak explains that many practitioners look only at serum zinc levels and miss the fact that cadmium can push zinc out of cells. The body, sensing zinc deficiency, holds onto zinc in the blood, so serum zinc can appear normal or even high while tissues are depleted. By measuring both the essential mineral and its toxic competitor (cadmium for zinc, lead for calcium/iron, etc.), one gets a true picture.

He uses a specific test (he struggles to recall the exact name) that evaluates zinc, selenium, copper, arsenic, lead, and cadmium simultaneously, describing it as cheap and highly informative. Correction then involves ensuring adequate selenium (to support glutathione for detoxification), zinc supplementation, and lifestyle changes to reduce exposure (e.g., avoiding contaminated foods, purifying water).

This testing was part of their preconception workup. He ties it to the larger theme of reducing the total toxic load on the developing child: industrial toxins, EMFs, poor diet, and stress all add up, and reducing the burden before pregnancy sets the stage for better development.

Czerniak notes that despite a vaginal birth in a hospital with minimal interventions, his daughter developed colic‑like symptoms. They suspected subclinical gut dysbiosis from hospital‑acquired bacteria, as hospitals are notorious reservoirs of resistant organisms. They used Vivomixx (a multi‑strain probiotic with high CFU count) and observed a dramatic improvement.

This experience led him to believe that many cases labeled ‘colic’ are actually mild infections or dysbiosis that can be corrected with probiotics rather than waiting for it to self‑resolve or prescribing anti‑reflux medications. It also underscores his point that even an apparently perfect birth can expose the infant to unwanted microbes, making microbiome support a sensible part of newborn care.

Czerniak was stunned by data showing that bariatric surgery in obese men led to rapid, dramatic improvements in sperm DNA methylation, shifting it toward patterns associated with better metabolic health in offspring. In long‑term observational studies, children of lean fathers consistently outperformed children of obese fathers on metabolic parameters — better glucose handling, lower body fat, less hypertension — regardless of the child’s own postnatal diet or socioeconomic status. This means the father’s metabolic state at the time of conception is a hard‑wired epigenetic determinant that later diet cannot fully override.

He contrasts this with the popular “get your diet right in pregnancy” message: if the father’s sperm carries damaged metabolic programming, the child starts life with a handicap. For Czerniak, this finding transformed pregnancy from an accidental event into a planned, year‑long optimization process for both partners. He argues that if we are serious about preventing metabolic disease in the next generation, preconception health must be reframed as a couple’s responsibility, not just the mother’s.

Czerniak explains that linoleic acid is an essential fatty acid needed in tiny amounts, but today’s consumption is roughly 10‑fold higher than what humans evolved on. When consumed in excess, it gets integrated into cell membranes and stored in adipose tissue, where it remains for about 680 days (almost two years). During that time, it is highly susceptible to oxidation, creating a persistent inflammatory and oxidative stress burden.

In pregnancy, that stored linoleic acid mobilizes and crosses the placenta. Critically, it interferes with the enzyme systems that convert and incorporate DHA (docosahexaenoic acid) into the fetal brain. Studies he cites followed children for years and found that those born to mothers with the highest linoleic acid intake during pregnancy had lower IQ and poorer academic performance — independent of postnatal diet. He frames this as a silent developmental insult that parents unwittingly impose by using cheap vegetable oils for cooking or eating processed foods.

His solution is radical avoidance: no refined seed oils, no processed foods containing them, and cooking only with saturated fats (butter, lard, tallow) or coconut oil. He also suggests that a mother thinking of becoming pregnant should cut these oils at least a year in advance to clear them from her tissues.

Czerniak bases this on a book by Dr. Tomasz Dangel, which meticulously calculates fetal and placental glucose requirements across gestation. In the first trimester, the embryo’s needs are negligible; only in the final weeks does demand approach 75 g/day. He argues that even on a strict ketogenic diet (providing ~20‑30 g carbohydrates), hepatic gluconeogenesis easily covers the shortfall, so the fetus is never deprived.

He notes anecdotally that women on ketogenic or carnivore diets abroad have carried pregnancies to term without complications, and that his own wife followed a low‑carb approach, increasing carbohydrates slightly only when she felt cravings for fruit or sourdough bread in later trimesters — which he sees as a natural, intuitive signal rather than a mandate to return to a high‑carb diet.

He warns, however, that what mothers must avoid are high glycemic loads, which promote gestational diabetes and overfeed the fetus, setting the stage for metabolic disease. The combination of high sugar and high linoleic acid is what he calls “a ready‑made recipe for disease.”

Czerniak says he was shocked when he and his wife first heard, both in hospital and at scientific meetings, that a nursing mother’s diet has no effect on her milk and that any reaction in the baby must be coincidental. He calls this “nonsense” (bzdura) and points out that breast milk is made from maternal blood, so everything she absorbs — including food antigens, toxins, and inflammatory mediators — can be transmitted.

In his practice, he has seen numerous cases where removing gluten, pasteurised dairy, or processed foods from the mother’s diet cleared up infant eczema, reflux, and colic within days. He argues that the “diet doesn’t matter” message discourages mothers from a simple, non‑invasive intervention and instead funnels babies toward medications or premature weaning.

He urges mothers to work with a lactation consultant and to pay close attention to their own diet if the baby shows signs of distress. His recommendation is an elimination approach starting with the most common triggers (gluten, lactose, processed foods) before concluding that breastfeeding itself is the problem.

In his clinical work, Czerniak says he has managed patients with TSH values between 30 and 100 µIU/mL — values that would typically trigger immediate levothyroxine prescription — solely with a protocol of very high‑dose vitamin D3 (enough to push serum levels well above 200 ng/mL), plus adequate iodine and zinc. These patients, he claims, did not experience fatigue, brain fog, or other classic hypothyroid symptoms while on this protocol; instead, their energy and cognition actually improved, and their thyroid glands sometimes recovered volume and function over time.

He references research showing that vitamin D powerfully modulates the immune system, which is relevant because most hypothyroidism in developed countries is autoimmune (Hashimoto’s). He theorizes that by calming autoimmunity and providing the raw materials for thyroid hormone synthesis (iodine, zinc), the gland can regenerate — possibly even from a single remaining follicle. He also expresses concern about long‑term levothyroxine use, citing older data linking it to increased breast cancer risk in women.

Czerniak stresses that this is an approach that requires careful monitoring and should be done before pregnancy, not during, because once pregnant a woman cannot simply stop medication. He plans to experiment on himself by pushing his own vitamin D levels higher to validate the cognitive benefits he has observed anecdotally.

Czerniak explains that after researching the linoleic acid threat, he examined the ingredients of infant formulas and found that every product on the shelf contained refined vegetable oils (sunflower, soybean, rapeseed) as the fat source. When he consulted experts, he learned that EU regulations mandate a certain linoleic acid content, which effectively forces manufacturers to include these oils. The powders then sit in cans at room temperature, and the polyunsaturated fats oxidize, creating lipid peroxides that are ingested by the newborn.

He mentions there is one product made from whole goat’s milk with no added vegetable oils, fortified with bovine colostrum, but it cannot legally be labeled as “infant formula” — it is sold as a dietary supplement. He considers this a far better option if breastfeeding is impossible. For complementary feeding, he denounces commercial jars: they are often loaded with sugars, starches, and preservatives that condition the child's palate and gut microbiome toward metabolic dysfunction. His solution is baby‑led weaning with real, single‑ingredient foods from the family table, appropriately cut for safety.