Retin-a gel, renova (tretinoin) or retin-a==what is best?

Depends on skin type. These are all retin a containing products and the proper formulation for use depends on your skin type. For example if you have very oily skin, the gel works best. If you have dry or sensitive skin Renova (tretinoin) or retin a micro contain moisturizers and/or time release dispersion of the retin a to diminish adverse side effects of the traditional retin a preparations.
Same. They are all retin-a. Gel is stronger than cream and more irritating.

Related Questions

Which retin a (tretinoin) gel should I go for? Please be specific!

Depends. Specificity is really impossible.It depends upon the seriousness of the acne and your sensitivity to the medication.Obviously a good question for your doctor. Read more...

What is the difference between isotrex topical gel and retin a (tretinoin)? Asked my derm for retin a (tretinoin) and he prescribed me isotrex topical gel instead

Acne. Apparently your doctor thought that your acne is more severe than you .Both drugs are retinoids but isotrex is a bit stronger. Read more...
(Iso)tretinoin. Retin-a is tretinoin (available in states as http://www.Drugs.Com/retin-a.Html) whereas isotrex (appears to be uk brand http://www.Netdoctor.Co.Uk/skin-and-hair/medicines/isotrex-gel.Html) is isotretinoin. When taken orally as a pill (don't eat cream/gel/lotion!), Isotretinoin first gained fame as Accutane (no longer sold in states under that brand). Read more...

Apply gel retin a (tretinoin). At pimple forehead Now my skin like rednees. So???

Right. You can get the cream and not the gel and get the lowest percentage and apply it only once every 2 or 3 days. You can also alternate with benzoyl peroxide 5%. After 6 weeks 80% report good signs of improvement in their acne. Read more...

I finally got my adult acne under control using epiduo gel but now I have dark spots on my face from breaking out before. Will the retin A (tretinoin) help?

Probably not. Retin A (tretinoin) is helpful for the acne, but can actually contribute to "post-inflammatory hyper-pigmentation" ( dark spots following acne) to some degree. You can add in topical 4% hydroquinone cream as a mild bleaching agent to be used nightly on the hyper-pigmented areas to gradually lighten them up. Read more...
Actually it may. Post inflammatory hyperpigmentation is improved with topicals that turnover the top layer of skin like all retinoids do. I like to combine Retinoic acid with lightening agents to get the most power and improvement. Beta hydroxy acid peels help a lot too. Read more...