There are two supplements that I have taken to lengthen telomeres. Each of the doses is age dependent for optimal effect per the manufacturer’s instructions. Note, this is one area where taking too much has less impact than the correct amount.
TA-65 was originally tested and laboratory proved to according to the manufacturer claims. while it mainly contains de-ironized cycloastragenol it also contains astragaloside IV.
The main active ingredient was at first thought to be cycloastragenol. I have found this brand particularly effective, and when I can afford it opt for the nanoparticles. Absorption is a big issue with cycloastragenol and the nanoparticles may even prove better at much lower cost than TA-65.
Please order the dosage appropriate for your biological age to get maximum effect. See my blog on how to determine your biological age using the pinch test.