Showing: 11 - 20 of 308 Articles

What if my A1C says I’m diabetic but my CGM says I’m fine? | Masterjohn Q&A Files #297

Short answer: Trust the CGM. HbA1c is confounded by red blood cell turnover and fructosamine 3-kinase activity. This episode was cut from the original Q&A session that you can find here. DISCLAIMER: I have a PhD in Nutritional Sciences and my expertise is in performing and evaluating nutritional research. I am not a medical doctor and nothing …

Reversing Fatty Liver: How Long Does It Take? | Masterjohn Q&A Files #296

Short answer: You should be able to see changes on imaging within a few weeks if your approach is working well, but ultimately this is entirely dependent on how negative your “delta fatty liver = (fat in) – ((fat out) + (fat burned))” equation is. This episode was cut from the original Q&A session that you …

What’s the difference between 25(OH)D and 1,25(OH)2D when it comes to the VDR? | Masterjohn Q&A Files #295

Short answer: 25(OH)D is 1000 times weaker at activating the VDR than 1,25(OH)D, but 1000 times more abundant. This is why I advocate measuring both, and ultimately believe we need to create a calculated index of “biological vitamin D activity” from them. This episode was cut from the original Q&A session that you can find here. DISCLAIMER: …

If glutathione whitens your skin, is that good or bad? | Masterjohn Q&A Files #294

Short Answer: Measure this against whether it increases your likelihood of burning. If it does, it’s probably a bad thing, but if it doesn’t, or if it lowers your risk of burning, that’s a good thing. Watch the video or listen to the podcast with the links below. You can obtain a full transcript of …

Vitamin D supplements, testing, and interactions with the vaccine. | Masterjohn Q&A Files #293

Short Answer: Vaccination shouldn’t change the vitamin D requirement. Quarterly testing makes sense for someone who has never tested before or who wants to make sure they stay in range during COVID, but generally testing yearly around the mid-point of seasonality for you, once you know your variation, is plenty. Watch the video or listen …

BH4 vs tyrosine for low neurotransmitters and a high phenylalanine-to-tyrosine ratio. | Masterjohn Q&A Files #292

Short Answer: BH4 is expensive and requires very high doses, so if the problem is modest it can much more easily be solved by taking tyrosine. Watch the video or listen to the podcast with the links below. You can obtain a full transcript of the episode by signing up for the Masterpass at https://chrismasterjohnphd.com/q&a …

Is urinary mycotoxin testing useful for indoor mold exposure? | Masterjohn Q&A Files #290

Short Answer: When I had a serious case of indoor mold-induced illness, I tested my urine and my apartment dust for mycotoxins. Both were high, but the classes of toxins were totally different between the two, making me think the mycotoxins in my urine came from food rather than my apartment. Symptoms going away when …

Ferritin sky-high without hemochromatosis? | Masterjohn Q&A Files #289

Short Answer: Even if genetics and other bloodwork don’t look like hemochromatosis, sky-high ferritin justifies trying to lower it with blood donation or phlebotomy if inflammation markers are low. If this doesn’t work, oxidative stress should be investigated. Watch the video or listen to the podcast with the links below. You can obtain a full …

Will the booster shot be worth it? | Masterjohn Q&A Files #288

Short Answer: If optimizing for efficacy, the booster shot will likely be worth it for Pfizer, whereas other vaccines don’t have clear evidence of declining efficacy yet. If optimizing for safety, one should be skeptical of the booster since a 3-dose regiment hasn’t been tested in clinical trials. Watch the video or listen to the …