Any ideas?

Yes. But first, let's clear up some issues in your OP post.

Class is now in session. ;-)

... kelp supplements ...

Forget kelp.

You can get arsenic poisoning from kelp.

Joe Rogan got into the "eat a lot of sardines" trend. Ate 3 cans a day. Went to the doctor and doc told him he had arsenic in his blood.

Why? Because sardines are bottom feeders and they get all sorts of pollutants, including arsenic.

Kelp is the same.

A study of herbal kelp supplements led by UC Davis public health expert Marc Schenker concludes that its medicinal use may cause inadvertent arsenic poisoning and health dangers for consumers, especially when overused. Schenker and two researchers evaluated nine over-the-counter herbal kelp products and found higher than acceptable arsenic levels in eight of them.

https://www.sciencedaily.com/releases/2007/04/070406140955.htm

1 dose of levothyroxine messed me up ...

90% of doctors don't know jack shit about health, and most of them don't REALLY care, because if they did they would do their research like the less-than-10% do.

Try to stay off Big Pharma drugs, in general. There are times when it is a last resort, but for most people in most situations, it is not.

... so i'm trying to do something else.

Good.

I cleaned up my diet ...

Good ... BUT ... what does that MEAN ... EXACTLY?

Your idea of a "clean diet" might not be my idea or someone else's.

If you are like most people, you have been indoctrinated with false propaganda, like I was and most everyone else is.

... intentionally created a caloric deficit ...

Not necessary.

... and incorporated more exercise

Good idea.

... but the weight is not coming off ...

That tells me that most likely, your idea of a "clean diet" is misguided.

so that is telling me that the thyroid is still an issue.

Maybe.

I am taking vitamin b12 and b complex,

Is that because you are a vegan? It seems like the only people who take B12 supplements are vegans.

If you are a vegan, then ... THAT IS YOUR PROBLEM.

Veganism is HARMFUL, not healthy.

That is what I mean by false propaganda.

Lots of "plant-based diet" BULLSHIT out there these days.

I don't know if you are a vegan, or near-vegan, but if you are, then you have been indoctrinated into a CULT.

I understand. I tried veganism many years ago, for about 6 months.

But I discovered that the vegan promoters are LIARS.

They lie about everything when it comes to the human body and nutrition.

EVERYTHING.

I read books by Dr. John McDougal and Dr. Dean Ornish.

Both, I later found out, are liars, and McDougal is an out-and-out nut job (I did not know this from reading his book, but found out when I later saw him on video in an interview -- complete nut job wacko).

... cut down on the bullshit food ...

Again, "bullshit food" might or might not be what you think it is.

now going on nightly walks.

Good. Walking is great.

Because I am overweight by a hundred pounds, running is hard on my joints at the moment.

Then, don't run. Walk. That is perfectly ok.

I lost my gallbladder from pregnancy as well,

That might be a problem. Was it surgically removed? If so, you might have had a bad doctor, but I don't know the situation. Maybe it was necessary.

The gallbladder stores bile, which breaks down dietary fat.

I will address this in a bit.

so I have to be careful what I do. At the moment I am trying a Mediterranean type diet

Garbage.

The Mediterranean Diet was invented by Ancel Keys, one of the BIGGEST con men in American medical history. He was funded by the Rockefellers, and engaged in outright fraudulent "science."

He was single-handedly responsible for getting Americans to be afraid of eating dietary fat, and did so via fraudulent "research," known as the "7 Countries Study" (sometimes known as the "6 Countries Study," depending on whether you consider England and Wales to be one or two countries in the study).

and I feel better, but the weight is still there.

Obviously, you are doing something that is not working.

So, consider this ...

Low thyroid is caused by malnutrition. Could be low iodine, or could be low in other nutrients that support the function of the thyroid, such as Vitamin A (only found in animal foods, and NEVER found in ANY plant food), magnesium, zinc, selenium, and some others, all found in abundance in red meat, but generally not found at all in plant foods, or found in the wrong "type" of nutrient in plant foods.

So, let's start here:

ALL plants (as in ... ALL) have chemicals for defense. They want to survive, just like animals do. Some research has shown that plants are "aware" of their environment the same way as animals are, and they communicate to each other.

Some plants "want" some animals -- only SOME animals, not all -- to eat their fruit, but they do not "want" their body to be eaten because that would kill them. Therefore, they have developed chemicals as their means of defense, since they cannot run, cannot hide, and cannot bite back.

Their chemicals are their defense.

Broccoli, for example, has 2 chemicals that when the plant senses something (like a bug, or a human) biting its flesh, it mixes those chemicals together to create cyanide.

The cyanide is enough to burst the stomach of a bug and kill it, but for humans it is a small dose of poison. Still, those small doses add up over time and are the primary cause of human illness.

EVERY plant in the supermarket (as in ... EVERY) has AT LEAST 60 KNOWN CARCINOGENS. Minimum. Some have over 100.

All of these are toxins in our bodies and cause us health problems.

All plants also have anti-nutrients.

You hear about the nutrients (which is just propaganda, as plants don't really have nutrients for humans), but nobody wants to talk about the anti-nutrients.

Lechtins, oxylates, and other anti-nutrients in plants block the absorption of nutrients you would otherwise get from the foods you eat.

Oysters have the most zinc of any food you eat. If you only eat the oysters, you get all the zinc absorbed and utilized in your body.

But if you also eat corn or beans with the oysters, the anti-nutrients in the corn and/or beans will block 50%-100% of the zinc, so you are actually malnourished even though you ate a food with a lot of zinc. Your body can't absorb it if it is blocked by the anti-nutrients in the plants.

So, let's talk about nutrients.

Vitamin A -- There is abundant vitamin A in beef, and massive amounts in beef liver. However, there is NO vitamin A in ANY plant. Some plants have betacarotine, which is NOT vitamin A. Some people can convert some of the betacarotine into vitamin A in their body, but it is a weak conversion and some can't convert it at all.

B-complex vitamins -- B12 is abundant in beef, but there is NO vitamin B12 in ANY plant, which is why vegans take supplements (which don't work, because the source of the B12 is fake). Red meat has all the other B vitamins, too. Some plants do, but not all.

Vitamin D -- This was wrongly labeled when it was discovered. It is not a vitamin, but a hormone. We make Vit D in our skin when we are in the Sun. There is also D2 and D3. D2 is a plant version of Vit D, but it is not converted well into D in the human body. D3 is the animal version of D, and can be converted in the human body to D. But the Sun is the best source. And don't use sunscreen. If you avoid seed oils in your diet for a few weeks or so, you should not get sunburned. Sunburn happens because you eat foods with seed oils, which accumulate in the skin, and the skin will burn in the Sun. French fries (not a health food, but ...) fried in beef tallow or other animal fat is fine, but today's french fries are all fried in seed oils, which is poison to humans. Back in the 1950's, you could get french fries that were fried in beef tallow, which is why people then didn't have the same problems we do today.

Vitamin K2 -- K2 is the animal version that humans need. Plants only have K1, which is not bioavailable to humans.

Minerals, such as calcium, iron, magnesium, zinc, etc. are all found the the proper bio-availability and ratios for humans in red meat. But they are NOT found in plants. Yes, plants have "calcium" and "magnesium," etc. ... BUT ... they are the WRONG KIND of minerals for humans.

Humans need heme iron, which is found in red meat. But plants only have non-heme iron, which has poor convertibility.

Basically, ALL minerals come in TWO forms: organic and inorganic.

Organic minerals are what humans need, and they come from animal foods.

Inorganic minerals come from rocks, which is what plants use and have. A plant digs its roots down into the soil. The plant absorbs the Sun via photosynthesis, as well as water, and carbon dioxide in the atmosphere (remember 5th grade science: animals breathe in oxygen and breathe out carbon dioxide, while plants take in carbon dioxide from the air and expel oxygen back into the air).

The plant is able to take energy from the Sun and convert it into liquid carbon inside the stalk of the plant (or tree trunk, etc.). Thus, plants convert ENERGY (from the Sun) into MATTER (plant matter). This liquid carbon drips down into its roots in the soil, where microorganisms suck on the liquid, using it to dissolve the rocks in the soil, and turn the rocks into liquid minerals, giving it right back to the plants to use as their source of minerals.

BUT ... these minerals COME FROM ROCKS ... and not from animals.

When herbivore animals eat the plants, they convert plant matter into animal matter. Thus ... the cycle of life.

ALL animals function ONLY on protein and fat. NO ANIMAL functions on "carbohydrates" -- except for the dumb humans, subjected to the false propaganda of "muh plant-based diet" mantra.

A cow eats grass. And yes, that is "carbohydrate" in the form of cellulose or "fiber."

BUT ... unlike humans, the cow has trillions of bacteria in its stomach (humans have ZERO bacteria in our stomachs). Bacteria are the ONLY thing on planet Earth that can break down and digest fiber/cellulose, which is why we have some bacteria in our colon.

Some animals have bacteria in their stomach, while others have it in their colon.

The cow's bacteria digest the cellulose/fiber in the stomach, then send it back up to the mouth, which is why a cow "chews its cud." It can digest and regurgitate and chew the same grass up to 200 times (somebody actually counted, apparently).

The bacteria in the cow's stomach produces a waste product from digesting that cellulose/fiber, which is fatty acids. When the bacteria die off (and others replace it), the bacteria become protein and amino acids for the cow.

So, the cow functions on amino acids (protein) and fatty acids (fat) and ZERO carbohydrates -- just like humans.

Humans can utilize SOME carbohydrate, but it is not optimal.

Carbs in the human diet ALL convert to SUGAR. NO EXCEPTIONS.

This sugar is in the form of glucose and/or fructose.

Glucose raises blood sugar, which causes the body to produce excess insulin, which causes many of the health problems humans have.

Excess glucose (more than the body can push into cells to use for energy) is converted into triglyceride -- IOW: BODYFAT.

So, high carbs cause a person to be FAT, via stored bodyfat.

The other type of sugar is fructose from fruit and table sugar (as well as man-made high-fructose corn syrup, etc.), and it is processed in the liver.

These fructose molecules bind to proteins in a process called "glycation," which are known as "Advanced Glycated End Products" -- or "A.G.E.'s" ... because they AGE you.

This binding prevents the body from allowing the normal proteins to function properly, and the body often cannot cleanse itself properly. This also causes health problems.

So ... what to do? Especially about hypothyroid?

This is a long post, so it is Part 1 of 2. I will add a comment below as Part 2 of 2.