Quote from Dr. Garrett Smith on December 14, 2018, 1:04 pm

These will be arranged by the years they came out.  As you follow them down, you will start to see that the culprit is slowly being identified through a process of elimination.  First, multivitamins.  Later, cod liver oil.  Later on, Poison/”Vitamin A” and Hormone D, both things that humans are better off not consuming.

Early infant multivitamin supplementation is associated with increased risk for food allergy and asthma. (2004)

CONCLUSIONS:  Early vitamin supplementation is associated with increased risk for asthma in black children and food allergies in exclusively formula-fed children. Additional study is warranted to examine which components most strongly contribute to this risk.

All multivitamins will generally contain Vitamin A and Vitamin D.

Cod liver oil intake associated with more asthma and allergy in children.  Cod liver oil is a major source of Poison/”Vitamin A”, and also provides unwanted oral/”eaten” Vitamin D.

Effects of early intake of fruit or vegetables in relation to later asthma and allergic sensitization in school-age children. (2005)

CONCLUSION:  The present study suggests that the early introduction of daily fresh fruit or vegetables may decrease the risk of asthma after 1 y of life, whereas allergic sensitization at school age seemed to increase with extra vitamin and cod liver oil supplements during infancy.

The role of latitude, ultraviolet radiation exposure and vitamin D in childhood asthma and hayfever: an Australian multicenter study. (2011)

Oral supplementation with cod liver oil in childhood increased the odds of a history of having both asthma and hayfever (2.87; 1.00-8.32).

More Poison/”Vitamin A” during pregnancy, more asthma when kids are 7 years old.  Note that cod liver oil also contains Vitamin D.

Vitamin A and D intake in pregnancy, infant supplementation, and asthma development: the Norwegian Mother and Child Cohort. (2018)

Background:  Western diets may provide excess vitamin A, which is potentially toxic and could adversely affect respiratory health and counteract benefits from vitamin D.Objective:  The aim of this study was to examine child asthma at age 7 y in relation to maternal intake of vitamins A and D during pregnancy, infant supplementation with these vitamins, and their potential interaction.

Design:  We studied 61,676 school-age children (born during 2002-2007) from the Norwegian Mother and Child Cohort with data on maternal total (food and supplement) nutrient intake in pregnancy (food-frequency questionnaire validated against biomarkers) and infant supplement use at age 6 mo (n = 54,142 children). Linkage with the Norwegian Prescription Database enabled near-complete follow-up (end of second quarter in 2015) for dispensed medications to classify asthma. We used log-binomial regression to calculate adjusted RRs (aRRs) for asthma with 95% CIs.

Results:  Asthma increased according to maternal intake of total vitamin A [retinol activity equivalents (RAEs)] in the highest (≥2031 RAEs/d) compared with the lowest (≤779 RAEs/d) quintile (aRR: 1.21; 95% CI: 1.05, 1.40) and decreased for total vitamin D in the highest (≥13.6 µg/d) compared with the lowest (≤3.5 µg/d) quintile (aRR: 0.81; 95% CI: 0.67, 0.97) during pregnancy.

Conclusions:  Excess vitamin A (≥2.5 times the recommended intake) during pregnancy was associated with increased risk [of asthma in the children at 7 years old], whereas vitamin D intake close to recommendations was associated with a reduced risk of asthma in school-age children.
[…]
Potential mechanisms

Asthma is characterized by chronic airway inflammation and has been associated with atopy and a T-helper 2 (Th2)–dominated cytokine profile. Vitamin A exerts many of its effects through retinoic acid–mediated gene transcription, and retinoic acid may have a Th2 cell–promoting effect (44). Although vitamin A is mainly stored in the liver, excess vitamin A also accumulates in the lung (15), where retinoid metabolites may cause asthma-like symptoms (45). In the rat lung, vitamin A supplementation with higher and intermediate doses increases markers of oxidative stress (46), which also may impair lung function. We found no indication that antioxidant properties of β-carotene protect against asthma. The effect of β-carotene was weaker but in the same direction as retinol. However, many aspects related to the maternal–fetal transfer of retinoids and carotenoids, their metabolism in the developing tissues, and homeostatic control in the face of excessive maternal dietary vitamin A intake are still poorly understood (47).
[…]
Conclusions

In this study, we found that a diet naturally high in vitamin A combined with the use of supplements containing retinol during pregnancy place women at risk of vitamin A excess, which was associated with increased susceptibility to asthma in school-age children. We observed this effect for intakes that were ≥2.5 times the recommended dose, which is below the tolerable upper intake level for retinol of 3000 µg/d during pregnancy (27).

To summarize:

• It should first be noted that highest intake group for Vitamin A in this study began at 2031 RAE (Retinol Activity Equivalents) per day–which in the older measure of Poison/”Vitamin A” activity is equal to 6770 IU–and that this amount was well BELOW the “tolerable upper limit” for retinol in pregnancy set at 3000 mcg /10,000 IU per day!  This is not very much Poison/”Vitamin A” at all folks, and it caused more asthma in their  children!
• The more Vitamin A during pregnancy, the more asthma in the child seven years later.  SEVEN YEARS LATER the association still holds.  In my opinion, this is another confirmation that Chronic Insidious Vitamin A Toxicity does NOT go away on its own, it must be purposefully depleted and detoxed.  This is my specialty in my Poison/”Vitamin A” Detox program.
• They state the the effects of beta-carotene (a carotenoid, the plant members of the Poison/”Vitamin A” family) were weaker, yet still in the same direction as retinol (animal form of Poison/”Vitamin A”).
• It’s a Norwegian study.  What do you think was the source of most of the dietary Poison/”Vitamin A”?  Probably fatty, cold-water fish.  What do you think was the source of most of the supplementary Poison/”Vitamin A”?  Cod liver oil.  Multivitamins also played a big role, and are something I always advise AGAINST.