You are here:

Food Science/magnesium supplements


Long story short my cat has severe kidney failure and one symptom is magnesium deficiency. My vet recommended half of a 200 mg magnesium gluconate twice a day but so far I've been unable to locate this pill size.

I did find magnesium citrate 125 mg softgels that I can cut and squeeze. Any idea if one of these would be a rough equivalent to the 100 mg magnesium gluconate she recommended?

Hi Theo,

I don't know what differences there are between cat and human physiology regarding absorption of supplements.

In people magnesium gluconate is used as the supplement and the citrate form is generally used as a laxative.

Do not give your cat the citrate until you CHECK WITH YOUR VET FIRST!

If you can't get in touch with your vet, then seek the advice of another vet, even if it is at an animal hospital emergency room.

One option for AllExperts -

1. Dr Bindu Anand -

Dr Anand has the best ratings from AllExperts users and his response times are phenomenal! He is currently active and can take your question NOW!
Based on his ratings and some of his answers that I have reviewed I wouldn' hesitate to ask him for help with any vet question.

If you decide to go with one of the AllExperts vets, you should read the rest of my answer and send them all the information I am asking you for. This will give them a starting point with some basic information.

You say "severe kidney failure"... do you have any idea why this has happened?
How old is your cat?
Does he/she have any history of kidney problems?
What are you feeding your cat?
Did you have a recent change in your pet's diet (the past month)?

We have had problems with processed pet foods causing kidney failure when ingredients from China have been used.
Several years ago Melamine added to Chinese food-grade wheat gluten caused an estimated 30,000 pet deaths just in America, all through kidney failure.
The wheat gluten was very cheap, although "food-grade" means fit for human consumption.

Although most of it was reported to have been added to pet food, some of that wheat gluten made it's way into the human food supply (Del Monte was one of many companies that bought it).
I have never read or heard that it caused deaths or injury to any person.

Please ask a follow-up question and include the information I have asked you for...


It may be essential that you get some type of magnesium into your pet, but a veterinarian is who you need to seek out for advice, immediately.

I would consider an immediate change to whole foods. A rice/vegetable/chicken diet, organic if you can afford it, is preferable over any processed pet food.
Again, your pet's veterinarian is your first place to seek advice, especially for a dramatic diet change.
Your Vet has the records of your pet's health history and knows your pet nearly as well as you do.

Thanks for your question,
I hope your pet gets better,
Michael Polidori

Food Science

All Answers

Answers by Expert:

Ask Experts


Michael Polidori


I can answer questions about food safety issues and benefits vs risks issues related to the growing, environmental effects and health effects of conventional, organic and gene altered food (GE GMO genetically engineered), both plants and animals. I can answer questions related to the cause and treatment of nutritionally related disease (including immune related diseases) and nutritional problems related to healing physiological or nutritional injuries.


I have been studying food growing methods, regulatory rules and organic/conventional/biotechnological methods of producing foods since 1998. I have prepared materials for distribution concerning health safety issues, lack of regulation, environmental dangers and industry sponsored research of genetically engineered plants and animals. I have also created similar materials promoting the benefits of organic agriculture for not only direct health benefits but for dramatic reductions in pollution, indirectly benefitting our health. I have prepared research materials for and participated in Public Television talk and radio shows regarding the issues surrounding genetic engineering and organic foods and debated in college forums with mainstream scientific experts about the safety & regulatory issues of gene altered foods. 2000-2002 I managed booths at major North Carolina events interfacing with the public (including farmers) on organic vs GMO benefits and dangers. I understand regulatory practices, shortcomings & revolving jobs doors of the FDA, USDA and EPA and the industries they regulate. I have been involved in nutrition, health care, prescription drug, vaccine, disease, immune and wellness issues since 1997 reading and writing on the internet and in practical applications with myself, family and friends leading to paths of health, wellness and fitness.

North Carolina Citizens For Safe Food, Public Citizen, Organic Consumers Association, Union of Concerned Scientists, Environmental Working Group, PSRAST.

No Degree, but some college in the sciences (Biology, Chemistry, Calculus, Astronomy and Physics). I have also taken several courses in Logic and Philosophy. I am involved in extensive research using mainstream websites (many of which I am on mailing lists for) such as - peer-reviewed publications (The Lancet, New England Journal of Medicine, others), PubMed database of research studies, National Institutes of Health, FDA, USDA, EPA, University Research libraries, hospital databases (John Hopkins, Mayo Clinic, Cleveland Clinic, others). I also regulary contact/correspond-with manufacturers/suppliers of food products, pharmaceuticals (including vaccines) and supplements with questions, recommendations, criticisms and complements. Every week, I learn something new!

©2017 All rights reserved.