^Sis, I've tried most commercially available brands at various percentages. Kahit yung Euro retinaldhydes like Diacneal na-try ko na din, and I can definitely say na mas effective for me ang formulation ng derma ko ngayon. Like sis herroyalbleakness, I'm not sure if it's a placebo effect, but over the years I figured, why waste money and time trying and trying different products, when there's obviously something that already works for me?
Pero wary ako sa mga derma, lalo na ngayon na medyo more of negosyo na siya than profession. Napansin ko din lately na napaka-loose nila sa pag prescribe ng oral isotretinion. If you can find a derma you can trust, who genuinely cares for your general well being, while also respecting your funds, mas ok. Tretinoin is a prescription medication in other countries for a reason, so better get an expert opinion first before trying, mas mahirap i-reverse ang side effects and possibly, mas magastos.
For those din who are pregnant or trying to conceive, better quit tret altogether and ask for you OB's advice on when you can start again. While no significant side effects has been shown in certain studies, warning signs on packets are there to relieve manufacturers of potential liability.