Vitamin A vs. Beta Carotene

SludgeMunkey

New member
Joined
Nov 11, 2008
Messages
2,299
Reaction score
73
Points
0
Location
Bellevue, Nebraska
Country
United States
Display Name
Johnny O. Farnen
In reading up on various dietary supplements, I see a bit of information that confuses me.

Quite a few manufactures have dumped Vitamin A to prevent toxicity issues in animals and replaced it with beta carotene.

While I understand vitamin A toxicity fairly well, I do not quite understand the connection with beta carotene.

Since the beta carotene is metabolized into vitamin A, isn't there still a chance of vitamin A overdose by proxy? Or is there a difference in absorption of the metabolites resulting from beta carotene?

I am not sure if I am reading a marketing ploy or facts based on valid research.

Any input or suggested reading would be greatly appreciated!
 

Darkmaverick

Site Contributor
Joined
Mar 11, 2008
Messages
2,032
Reaction score
72
Points
0
Age
40
Location
Sydney
Country
Australia
Display Name
Rayson
Hi Johnny,

From my understanding, vitamin A is a big umbrella category comprising of various forms of retinol, retinol palmitate or acetate, as well as other forms of retinoid compounds - alpha and beta carotenes, cryptoxanthine etc. Some carotenoids can be converted more effectively into retinol but not others.

The rate of conversion and type of compound formed also differs. There is often competitive assimilation. The absorption rate of provitamin-A carotenoids such as beta-carotene is about half that compared to pure retinol forms.

The production of retinol from provitamins are regulated by the amount of retinol already available in the body. Thus, it is 'safer' to supplement with a provitamin rather than the vitamin itself. The absorption of provitamins also depends greatly on the amount of lipids ingested with the provitamin; lipids increase the uptake of the provitamin.

Not sure if this is the info you needed.

Cheers.
 

Lugubris

New member
Joined
Nov 23, 2012
Messages
40
Reaction score
5
Points
0
Location
Rohnert Park, California
Country
United States
Display Name
Scott
Just thought I might add that Vitamin A (retinoic acid form) can block the absorption of Vitamin D. Beta carotene is not effected by this though, which may be a contributing factor to the manufacturers switching. However, products with vitamin D should not be used for most salamanders and newts, they are designed for reptiles, dart frogs, and other high light species which need UV light and/or Vitamin D supplements for proper health. From the research I have done, most salamanders and newts synthesize vitamin D a different way.

Feeding your animals food gut loaded with vegetables high in beta carotene (carrots, romaine lettuce ect...) is always better than artificial supplementation.
 
General chit-chat
Help Users
  • No one is chatting at the moment.
  • Toothpickthelotl:
    Also, she was fine at the higher temperature. Perfectly healthy and never showed signs of de stress. Just thought it being colder would make her happier and digest a little slower! (She’s a pig :p )
    +1
    Unlike
  • SubZero:
    is it normal for a tiger to jump at you from being the glass
    +1
    Unlike
  • Murk:
    @Paige1warren That should be fine. I wouldn't suddenly put her in very cold water without acclimatisation, but a few degrees over the course of two hours shouldn't be a problem at all.
    +1
    Unlike
  • AlexisJG:
    Is anyone online? I need help badly
    +1
    Unlike
  • AlexisJG:
    I have had my 2 axolotls since June 2020 and I had hoped they would mature the same gender but unfortunately they are not. I am currently on vacation and planned to separate them once I returned, my axolotls are currently being cared for by a friend who knows the basics to care for them properly. A melanoid and a leucistic. I had a feeling but didn't prioritize it enough and now I have many many eggs in the tank with both of my axolotls. I have zero experience with eggs and cannot really care for juvenile axolotls but I really DO NOT want to kill them. What should I do? Are my axolotls okay being in the same tank with them? would the eggs be okay all together in a tank by themselves? Where can I find someone to care for them and hatch them?I'm so stressed and worried I just want the best for them all.
    +1
    Unlike
  • axie owner:
    you are going to have to get a bucket and put the eggs in that. they can hatch anytime between 11 and 20 days. order in brine shrimp eggs and get your friend to watch a video on hatching them. make sure your friend does 100% water changes every day. keep the water around 64digres and make sure your friend sends daily updates on them. i found kitchen salt works for the brine shrimp eggs. hope this helps.
    +1
    Unlike
  • Gots2knowme2:
    I am a new owner of two juvenile axolotls that are Lucie's. One has black eyes and one has silver eyes. Is that common or rare?
    +1
    Unlike
  • FP.Foxy:
    A few days ago, my Axolotl was about to die, there was something wrong with the water but he’s doing fine now. His skin is still cracked and his red things are still white
    +1
    Unlike
  • Toothpickthelotl:
    Hi guys.. I might of made an error and need some advice. One of the hides in my tank is too small for my axie now, but I did not want to buy another hide because they are expensive, so I decided to DIY one. I used a Tupperware (cut into a little home) and glued rocks from outside and plants on it. The problem is, I washed the rocks with soap and hot water. I completely wasn’t thinking. When I washed them there was no soap residue that was visible on the rocks, and the rocks have been drying for 3 days on the container. So it has been 3 days since I washed them. I used aquarium safe silicone to glue them on. It was fully dry tonight so I decided to put it in my tank. I had it in for about 3 mins until I realized j had washed the rocks in soap, and I took it out immediately. Should I be worried??? I’m really freaking out, I don’t want anything to happen to my baby! I was truly not thinking. I also read that it was safe to use rocks from outside, but now I’m not sure? Can anyone help
    +1
    Unlike
  • Saturn:
    @Paige1warren, Since you took it out straight away it should be ok but I'd still be doing a big water change. When I was a teen, I took some rocks from outside, washed them (probably in soap) and put them in my turtle tank. He died a week or so later and I've never used any rocks from the garden since because you just don't know what's been on them, such as pesticide and I suppose the mineral composition of the rock comes in to play too. Letting them dry for a few days before adding them also would have helped so you should be fine
    +1
    Unlike
  • Toothpickthelotl:
    @Saturn, okay, thank you so much! Firstly, I’m so sorry about your turtle :(. My lotl seems to be fine, I haven’t noticed any changes or signs of destress. I do 25% weekly water changes (I have a fully cycled tank), but I will do a 50% change today. I hope that everything turns out fine. Axies are pretty good at showing they are not well or stressed so I’m hoping that I got the rocks out fast enough. Thank you again!
    +1
    Unlike
  • Saturn:
    @Paige1warren, Thanks hun and you're absolutely right, axolotls are so sensitive it would've showed signs. Glad your lotl is ok :)
    +1
    Unlike
  • Pookisoo:
    Hii my tiger salamander has a black bump on his head, its looks like a little spot but its forming into a bump and its like making a hole..? You can tell i need help , please help😁
    +1
    Unlike
  • Pookisoo:
    Do i just give him a salt bath?
    +1
    Unlike
  • madcaplaughs:
    You need to take him to the vet if there's a hole that's forming in his head.
    +1
    Unlike
  • Tanker:
    New to site. Have a Golden Albino and a Black Melanoid
    +1
    Unlike
  • Tanker:
    Tank size 40 gal. 2 filter pumps /substrate roughed ceramic easy to clean / feed each one night crawler every 3 rd day
    +1
    Unlike
  • Murk:
    Ceramic substrate? That sounds interesting. What should I imagine by that?
    +1
    Unlike
  • AMurry24537:
    Can't say if this is what's being referred to, but I had some ceramic tiles in an aquarium for a while. I used a silicone sealant to secure them to the bottom and to each other. It worked well for about 6 months, but eventually a little water got through my imperfect seal and started creating mold problems
    +2
    Unlike
  • Murk:
    Ooh, tiles of course. I was thinking of those ceramic rings/balls you can buy as filter medium, but tiles make more sense. Thanks
    +1
    Unlike
  • Stacy:
    Hi there, I am a new Axolotl lover & owner of two cuties! They are little over 6 months old now. I have a divider and decided to see how they would be together because they always tried to get to each other threw the border/wall.
    +1
    Unlike
  • JoyJiang:
    In PowerSchool, what is your current grade for this class?Do you have any missing or incomplete assignments for this class?If yes, what assignments do you plan to complete before the end of the marking period (March 25th)?What can I do to help you get your grade to where you need it to be before the end of the marking period?
    +1
    Unlike
  • JoyJiang:
    Oh shoot wrong thing
    +1
    Unlike
  • Unlike
  • JoyJiang:
    Looolllllll
    +1
    Unlike
    JoyJiang: Looolllllll +1
    Top