Natty test boosters while you're suppressed is pointless. It won't boost anything from my understanding
This is true in theory. I'm 95% sure it's true in practice too but there isn't enough clinical studies to back it up 100%.
Essentially most natural testosterone boosters increase your testosterone levels through natural means (hence "natty test booster" lol). By natural this means your body's own endogenous (internal) system which is the HPTA system. If you're suppressed then your HPTA system is shut down, so you can't boost anything if it's shut down. Only way to increase testosterone levels in this case is with exogenous (external) means, aka providing an external source of testosterone (usually in the form of injections , patches or pellets).
For this reading who are a little confused, here's an analogy:
Imagine your body's testosterone creating system as a car. Let's say this car can go between 0-120mph. In its natural state you're cruising at 60mph, as you get older the car starts to get it beat down so your cruise speed starts dropping to 50, 40, 30mph etc. What natural test boosters can do is increase your speed to say 80mph, but it'll never go faster than 120mph. No matter how hard you press on the gas pedal , you can't go faster than how the car was internally build to go.
Now, if you're shut down then your car is completely off. You can push on the gas pedal (aka taking test boosters) but it won't do anything because the car is off, you're still at 0mph.
BUT let's say you add some nitro boosters with a separate pedal that turns on the boosters. Now, you can go 80mph even when the car is off because the nitro boosters are an *external* system. They function separately from your internal car system. Not only that, they can bring your car faster than it's internal limit of 120mph if you add enough nitro boosters. Let's say you add a dozen of those boosters to your car, now you can fly down the road at 500 mph. In this scenario the nitro boosters are testosterone injections.
Obviously it's way more complicated than that, but hopefully this analogy was simple enough for anyone reading to understand the differences and limitations between internal or natural production and external testosterone supplementation.