Keto Diet Fish | WORST Fish to Eat on a Ketogenic Diet | Keto Food Advice

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Keto Diet Fish | WORST Fish to Eat on a Ketogenic Diet | Keto Food Advice- Thomas DeLauer

Farm Raised

Tilapia is also fed methyltestosterone, which makes them grow bigger, but has been found to be toxic for our livers – In fact, methyltestosterone has been pulled off the market in Germany due to toxicity fears

Cancer Risk/Dioxin

Dioxins are found in tilapia and are a group of chemically-related compounds that are persistent environmental pollutants

Once dioxins enter the body, they last a long time because of their chemical stability and their ability to be absorbed by fat tissue, where they are then stored in the body – half-life in the body is estimated to be 7 to 11 years

It’s well-known for its ability to damage the immune system and interfere with hormonal systems and has been linked to birth defects, inability to maintain pregnancy and decreased fertility, among others

Omega 3’s

A serving of tilapia has 135 milligrams of omega 3’s, whereas a serving of salmon has over 2,000 milligrams of omega-3’s

Swordfish is among the species of fish that is very high in mercury, an environmental contaminant that can cause brain damage

The mercury found in fish is methylmercury – mercury is released into the air and then settles onto the land and into the water

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Bacteria and other microorganisms convert the mercury into methylmercury

Then, fish and shellfish in the water begin to absorb it – fish that eat other fish and who live longer have higher levels of methylmercury

Methylmercury is toxic to the central nervous system – the brain and spinal cord and can cause irreversible damage (brains of unborn babies and infants are especially susceptible)

How much damage is done depends on how much you are exposed to the chemical

The effects of methylmercury poisoning include cerebral palsy, blindness, deafness, impaired mental functioning, impaired lung function, growth problems, and having a small head

Specifically, injuries caused by methylmercury (MeHg) in the central nervous system are related to its ability to increase reactive oxygen species

Mercury also has the ability to increase the permeability of chloride channels of GABA A receptors in the dorsal root ganglion, which is associated with neuronal hyperpolarization

A 100 g of raw yellowfin tuna has 108 calories, 0 carbs, 0.9 g fat and 23.4 g protein, while the bluefin variety is fattier and more flavourful – it contains 144 calories per 100 g, 0 carbs, 4.9 g fat, and 23.3 g protein

It’s rich in selenium, magnesium and potassium, but in terms of fat, it’s not the most favorable for keto

Additionally, tuna is one of the larger sea predators, and because of being high in the food chain, it contains higher levels of mercury than most other fish (yellowfin tuna has the most)

1) Omega-3 polyunsaturated fatty acids augment the muscle protein anabolic response to hyperaminoacidemia-hyperinsulinemia in healthy young and middle aged men and women. (n.d.). Retrieved from
2) Parra D , et al. (n.d.). A diet rich in long chain omega-3 fatty acids modulates satiety in overweight and obese volunteers during weight loss. – PubMed – NCBI. Retrieved from
3) Fish oil intake induces UCP1 upregulation in brown and white adipose tissue via the sympathetic nervous system. (2015, December 17). Retrieved from
4) Effects of n-3 Polyunsaturated Fatty Acids (?-3) Supplementation on Some Cardiovascular Risk Factors with a Ketogenic Mediterranean Diet. (n.d.). Retrieved from
5) Essential Fatty Acids: Omega 3 and Omega 6 | Ruled Me. (2018, May 1). Retrieved from
6) Using Supplements on Keto: The Top 16 and Why You Need Them. (2018, April 19). Retrieved from
7) An Increase in the Omega-6/Omega-3 Fatty Acid Ratio Increases the Risk for Obesity. (n.d.). Retrieved from
8) Toxic Effects of Mercury on the Cardiovascular and Central Nervous Systems. (n.d.). Retrieved from
9) Methylmercury poisoning: MedlinePlus Medical Encyclopedia. (n.d.). Retrieved from

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21 thoughts on “Keto Diet Fish | WORST Fish to Eat on a Ketogenic Diet | Keto Food Advice”

  1. I stay away from tilapia and sword, but sushi grade spicy tuna is a love and I am probably never going to give it up. I am not going to justify, yes the metal poisoning is possible but I would also say that Japanese people eat a lot of tuna and they are some of the healthiest people on the planet

  2. Looking for info on freshwater fish. I live on a lake so freshwater fish is common to eat.

  3. Just wanting to know…Isn't it the same how gardens that use compost and chicken manure the same as feeding the fish manure? I know more than likely the chicken and pigs were more than likely not organically raised, but I'm speaking of the concept.

  4. New to keto so just want clarification. How is eating tuna in oil taking away from the oil or omegas in the fish. I’m asking based on the comment the oil should come from the fish, not the oil in the can. Isn’t it still coming from the fish AND the added olive oil? Is it such a horrible thing to get oil from both the tuna or salmon and the olive oil? Thank you for clarifying.

  5. This video is sounding like a moon landing conspiracy theory. Feeding pig feces to fish? Oh, come on.

    Oh, and one of the fish farms that you feature, at 1:55, looks like it is from the Faroe Islands which is very well managed (unlike Norwegian fish farms).

    Will your next video feature them feeding aborted human fetuses to pigs, and that the government is actually covering it up?

  6. If you are on KETO, stay away from food with high content of Mercury, Pesticides, and
    Toxins. Try to get your diet as organic as possible, stay away from gene
    modified products and farmed salmon. Use only WILD salmon, much healthier than
    farmed salmon. Norwegian farmed salmon is the most toxic food in the world. It
    increases the risk for miscarriages, cancer and strokes.

  7. this video taught me how tilapia farms work. Was 100% worth watching the video, although it did not have a big variety of fish to compare.

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