never had an issue with liquid but I got mine from a trusty source not sketch peptide site. don't know if that makes a difference

i had an issue with some liquid AI, i know this has been refered to a few times. i would like to say that issue is something that would be considered very rare and out of the norm, the AI was lost in the mail for a little more than two weeks in a part of the USA that was extremely hot during that time. i dont believe under normal shipping circumstances this is something that anyone needs to worry about even during hot months. i still use liquid and will continue to do so. i have used both pharma and liquid and to be honest i prefer liquid.

I have used both and never had a problem , however the liquid form tend to lose potency after a year .

It depends on how the liquid is manufactured. Let's use nolvadex as an example to make things easy. With nolvadex, you need to look at the total tamoxifen CITRATE content. 15.2mg's of liquid tamoxifen is equivalent to 10mg of tamoxifen in pill/powder form. A good liquid manufacturer would take heed of this, and suspend exactly 10mg (or whatever) per 1mL solution.

This means that a GOOD manufacturer will put in 15.2mg per 1mL nolvadex, thereby essentially making it equal to a 10mg nolva pill.

So, when you order liquid online, you need to read their product description to research their technical specification, and total citrate content. This way you can know whether to overdose their product, or take the regular 1mL dose. And if you are unsure about the concentration of the particular product, you should always contact the company and ask them yourself.

EDIT: NEVERMIND, I just realized you were asking specifically about product efficacy during heat loss. My bad for not thoroughly reading your question first. I don't believe it makes THAT much of a difference, but I can't say for 100% sure. I know that even exposing your whey protein or sunblock to the summer heat in a hot car will make it lose its maximum efficiency.

But as far as PCT meds, it probably depends on the actual chemical. Some molecules are highly stable and can survive for decades even through heat, while others are unstable and even a few minutes of exposure to light or heat will cause it to degrade.

My suggestion is to look up the boiling point and melting point of whatever molecule it is you are ordering. If it is relatively high, as in much higher than the temperature of where you live, you are probably safe. If its boiling point and melting point are low, then perhaps you should look into overnight shipping.