vitamin a

  1. haidut

    Vtamin A deficiency may be a cauuse of type II diabetes

    I posted another study on the topic several months ago. It looks like vitamin A is crucial for both calcium and glucose homeostasis, both of which are at the heart of type II diabetes. http://www.medicalnewstoday.com/articles/288199.php
  2. K

    Reconsidering Cod Liver Oil As A Good Natural Vitamin A Source

    Before everybody thinks I'm just here to rant, troll and put noise here. No, I'm not. I do like Ray Peat, I do eat Ray inspired, I do like the thousand of post here such as from haidut and suikerbuik trying to explain the details of Ray Peat works. If I agree, I just nod my head, and I don't...
    • Kasper
    • Thread
    • supplemental vitamin a
    • Replies: 21
    • Forum: A
  3. R

    Nutrisorb Vitamin A /Interplexus

    I found a small company that has Nutrisorb Vitamin A /Interplexus in stock, is this brand worth the price tag based on your experience ? All other brands don't seem ideal.
    • Raypmom
    • Thread
    • supplemental vitamin a
    • Replies: 15
    • Forum: A
  4. haidut

    Vitamin A Is Anti-Estrogenic

    Unlike all the other studies I have seen this is an in vivo study, so it provides some guidelines on dosage. The human equivalent dosage would be in the range of 200,000 - 250,000 IU of all-trans-retinoic acid (which is a metabolite of retinol). That is on the high end, but note that the...
  5. P

    Does Exposure To Red Light Increase Requirements For Vitamin A?

    Is anyone able to clarify the red light/Vitamin A requirements for me? Does exposure to red light increase requirements, or only that which is shone into the eyes? (Vitamin A is called retinol after all...)
  6. Vinero

    Absorption Of Vitamin K

    I'm still confused about the need for dietary fat when taking vitamin K2. I've seen reports from people just using a drop of Thorne under their tongue without fat/food, and also seen comments from people saying all fat soluble vitamins (A, D, E, and K) are only absorped if you have them with a...
    • Vinero
    • Thread
    • supplemental vitamin a
    • Replies: 2
    • Forum: A
  7. L

    Topical Vitamin A Concern

    I was just reading the Environmental Working Group Sunscreen Guide. They pointed to "A study by U.S. government scientists suggests that retinyl palmitate, a form of vitamin A, may speed the development of skin tumors and lesions when applied to the skin in the presence of sunlight (NTP 2012)."...
    • Lin
    • Thread
    • supplemental vitamin a
    • Replies: 1
    • Forum: A
  8. J

    PureBulk Vitamin A

    I just found out it exists. Link
    • j.
    • Thread
    • supplemental vitamin a
    • Replies: 9
    • Forum: A
  9. J

    Dr Clark's Vitamin A

    Dr Clark's Vitamin A drops might be the least talked about vitamin A product on the internet. It's from a company known for making supplements with few or no additives. The Vitamin A product does happen to have synthetic vitamin E (dl-alpha tocopherol). But considering how hard it is to get...
    • j.
    • Thread
    • supplemental vitamin a
    • Replies: 3
    • Forum: A
  10. J

    Micellized Vitamin A Supplements

    Some brands and ingredients: A-Mulsion Liquid by Seroyal Active Ingredients: Vitamin A (vitamin A palmitate) 10000 IU, Stevia (Stevia rebaudiana) Leaf Std. Extract (90% Stevioside) 0.01 mg Inactive Ingredients: Purified water, xylitol, modified tapioca starch, xanthan gum, lemon oil, natural...
    • j.
    • Thread
    • supplemental vitamin a
    • Replies: 6
    • Forum: A
  11. G

    Libido Issues W/ Vit A

    Based on my experience with aromatase inhibitors (letrozole, exemestane) I know exactly what if feels like when my estrogen gets too low and my libido completely tanks. The opposite sex, or rather sex in general, just doesn't concern me. It's like thinking about a slice a bread or something...
    • gabys225
    • Thread
    • supplemental vitamin a
    • Replies: 19
    • Forum: A
  12. haidut

    Vitamin A (retinol) Inhibits Aromatase

    I mentioned this in my other posts but wanted to post at least one direct study for those interested in the vitamin A anti estrogenic effect: Retinol inhibits aromatase activity and expression in vitro. - PubMed - NCBI "...Aromatase converts androgens into estrogens and is thought to supply a...
    • haidut
    • Thread
    • aromatase aromatase inhibition estrogen study vitamin a
    • Replies: 2
    • Forum: Scientific Studies
  13. haidut

    Vitamin A inhibits estrogen induced breast cancer

    Ray has written about the anti estrogenic properties of the fat soluble vitamins, and here are some in vivo studies that show vitamin A both reduces breast cancer incidence and inhibits tumor growth even after being administered with a significant delay after tumor induction...
  14. haidut

    Vitamin A (retinol) Is Not Toxic To The Liver In High Doses

    As a follow up on my previous post, this study looks at toxicity of retinol acetate in doses exceeding 300,000 IU per day taken for months and in combination with a SERM (tamoxifen) which itself is quite estrogenic and as such is a proven liver burden. http://www.ncbi.nlm.nih.gov/pubmed/3218964
  15. haidut

    Vitamin A (retinol) reduces hepatic cancer incidence by 89%!

    I know a lot of people here avoid taking vitamin A or do so at very low doses out of fear of liver toxicity. In theory, anything that is toxic to the liver would tend to cause hepatic carcinoma in the long run. However, in the case of vitamin A (retinol) not only there seems to be no liver...
  16. haidut

    Vitamin A (retinol derivatives) is an anti-cortisol agent

    At least it is in the brain, and the lowering of cortisol retinol caused in the brain (hippocampus) led to improvement in age-related memory loss. However, if you read the study you'll see that the authors seem convinced that retinol downregulates the glucorticoid "receptors" not just in the...
  17. F

    A Non-micelized Oil Based Vitamin A Recommendation?

    I see vitamin A is not so popular like vitamin D ,there are fewer products available and not so many reviews under them, I could not count even 5 different brands of it. Vitamin A seems to be forgotten. I see they sell some vitamin A (Now and Natures Way) bottles for like 3 or 4 dollars on...
    • freal
    • Thread
    • supplemental vitamin a
    • Replies: 2
    • Forum: A
  18. J

    Water Soluble Vitamin A Is 10 Times As Toxic As Fat-soluble

    Water-miscible, emulsified, and solid forms of retinol supplements are more toxic than oil-based preparations. From wikipedia: Link
  19. J

    PUFA From Vitamin A Capsule

    Capsules often contain oils, so many want to know if they would have too much. I asked one company and they replied that it has less than 2% fat, which seems like a good thing. My question: Regarding the product Country Life, Gluten Free, Vitamin A, 10,000 IU, 100 Softgels, how many...
    • j.
    • Thread
    • supplemental vitamin a
    • Replies: 3
    • Forum: A
  20. J

    Vitamin A From IHerb (7/17/2013)

    Whole list Without soy or silica: Country Life InterPlexus Inc., NutriSorb A, Carlson Labs Solgar (not the dry one) With soy (might or might not have silica): Nature's Way Now Foods Bluebonnet Nutrition Natural Factors Nature's Plus Thompson Sundown 21st Century Health Care With silica (might...
    • j.
    • Thread
    • supplemental vitamin a
    • Replies: 4
    • Forum: A
Back
Top Bottom