Love it, nothing would get done without it. A few tricks and changes I applied over the decades:

• When you are in a hard spot, or habit building, or a child, 25 minutes can be too much. How about 10 minutes. The thought that after those 10 minutes I’ll be more skilled at X than ever before IN MY LIFE can be quite motivating.
• Similarly, how about just ONE session? Seems ridiculous, but what I got done with that over 10 years is nothing short of amazing.
• Be super-serious about it. You can get water upfront, you can go to the toilet, but not once the session started. It’s essentially Squid Game, and only the player who crammed the most into their head survives. If you have to pee, you pee in your pants. You don’t get water. When you do break the rules, e. g. because there is literally a fire (react to fire only if survival chance is < 90 %), the session is marked as failed and you are done for the day. It’s DEFINITELY better than half-assing two sessions even a little bit, like reacting to a phone buzz or door bell or getting water.
• Audio-Log. Your task is serious (see above), it’s like reviving a frozen Neanderthal. Example: “It’s Jan 1 2025 3 p.m. Ready to start the 25 minute countdown and point of no return … now. Ok, max performance needed. Item of highest priority: Find position in book and recap what we learned yesterday with a 42 second timebox. Note: After 42 seconds, acquisition of new information directly will become more effective than preparing for it. Timebox counting down now on second timer. …” I just hope nobody ever finds my audio logs, or I’m in the nuthouse for good.

One of the things I love about it is that it gives a unit of measure. It’s no longer like: I want to be a programmer, so I have to do this for a couple of years with no clear end. It’s a unit of progress that can go on a todo-list and be checked off.

So yes, for learning new things, it’s still my way to go. Usually with 1 unit per day only, 45 minutes, sometimes 25. Most other tasks offer a different breakdown. E. g. cleaning up - can’t just do it. But it is less threatening with checkable tasks like: 1. put all garbage in a bag. 2. put all non-foods in box 1. 3. …

I work from home, and I have to use lots of methods. Then it works.

Just two examples:

• I always have to work strictly with todo-lists. When it’s not on a list, it’s not getting done. On the other hand, putting it on the list, rather than doing it, feels like 55 % of the mental effort.

• Implementation intention: My brain takes offence to “must do now” orders. Instead, when I catch myself on a youtube/scrolling binge, I set a trigger (e. g. time, end of video) at which I do one item from the list. If there is no list, I write the list. That way, I get to continue enjoying for a bit longer, but now guilt-free (!), and can continue guilt-free after doing that one thing.

I think the big picture is huge and not entirely known. One angle: A cause of ADHD is a bad gut biome. This may also affect the bioavailability of micronutrients, thus leading the deficiencies. Compensating for that by taking more, with supplements, could help with additional symptoms.

Long before I had a diagnosis or meds, I had some good runs, few years even, and even back then, I saw the link to certain foods. When fixing multiple problems at the same time, the effect was enormous.

Some caffeine, but well distributed, as a poor man’s stimulant, combined with drinking a lot, very specific foods … I think it was a mix of “medication”, hydration, gut biome (low sugar, probiotic foods) and fixing multiple deficiencies at the same time. When that extra energy results in more physical activity, additional amplification happens.

So yes, I believe that multi-vector attacks on your health problems work in synergy, better than the sum of their parts.

As for iron specifically, a lot can be done wrong. What I recall: Best in the morning before first coffee / tee and some time in-between, with Vitamin C. Personally, I can’t stomach it, so I got to ignore that rule and just take it with the biggest meal.

A lot can be learnt, as I did for decades. Always obsessed to try all the various methods, and enough of them work for me, to a degree.

But I think when it has gone to the point, there is more to it. In my case, it was the ADHD. My brain did not follow through with the plan to start doing the task, always had to push through some inner “pain”, and that is not pleasant. For others, it might be depression. So I had a lot of pain just to do the highest priorities barely good enough, while a normal brain would do it all without the effort, and kick in sweet dopamine rewards after each task.

Neurotypicals think they have this superior discipline and attitude to “get on the task”, and I believed them, too! Now, medicated, I realise that they only work on these constant dopamine micro rewards in their prefrontal cortex. Which I now get, too.

I developed this unique tea leaf / tree bark mix over 20 years ago, and I could swear it changed my life. I studied for 14 hours per day sometimes and absorbed all my training within a few years. Then the effect was gone.

Looking at it objectively, maybe the trick was that it had just the right amount of caffeine, but unlike pure black tea, not too much at once and with a lot of water. Possibly also compensating a micro nutrient deficit. Could also be complex indirect effects, e. g.: ADHD related to gut biome, additional problems due to bad bacteria / yeast overrepresented, medicinal plants in the mix fighting that, to a mild degree.

Treating digestion problems with medicinal tea in combination with caffeine and love for black tea started the whole idea, IIRC, so it’s not entirely impossible.