It cannot be weaker. They all contain exactly the same amount of estradiol and if they are given the same name, and from the same company then it will be the same formulation. Sometimes a different name for the same product on different countries. Seriously girls, there are more important things to worry about than the colour of a square on a bottle of identical gel!!!
As I have often said, there are many ways in which absorption can vary - mostly to do with the woman herself ie her own hormonal status - where she is in her cycle, her menopause, where she applies it on her body, when she applies it on her body, the area of skin covered by the gel (this is very imprecise, unlike a tablet or patch), the temperature in the room, the temperature of her skin, the thickness of her skin etc etc, and last but not least, her expectations of what the gel will do, as well as her mood generally. I would have thought that batch variation is so slight as to be negligible given product control and oversight by the company, by comparison with all these other factors.
Previously we have covered potential differences in storage by import companies - leading to deterioration - but the company itself has tested out storage and various temps etc and have found the product to be pretty stable...
Try to look on the positive side and think that you have HRT oestrogen gel and that it is going to do you good. If one week or so, you feel less good - maybe has something to do with external factors, or if your menopausal symptoms are returning after a few weeks, then maybe you need to increase your dose - which is easy to do with gel
Hurdity x