The phrase "although the impact of" is correct and usable in written English.
It can be used to introduce a contrast or exception regarding the effects or consequences of something being discussed.
Example: "Although the impact of climate change is evident, many still deny its existence."
Alternatives: "despite the effects of" or "even though the influence of".
Although the impact of many of these programs is uncertain, the opioid epidemic continues to grow.
Although the impact of divestment on share prices may be relatively small, the reputational damage can have serious financial consequences.
Although the impact of the artifact is small in the clinical area, it is important under some research circumstances.
Although the impact of today's uncertainty in global markets has yet to be seen, the trend offshore has so far been positive.
Although the impact of environmental covariates on foraging guild density was generally unclear, omnivore densities significantly increased further from protected areas (Fig. 5).
Moreover, the number of others is important, such that more bystanders leads to less assistance, although the impact of each additional bystander has a diminishing impact on helping.
Although the impact of any change could be substantial -- on individuals, employers and the economy -- the issue has gotten relatively little attention so far in Washington.
Although the impact of the budget on the overall market was rather muted, retailers benefited from confirmation that Sunday trading laws would be relaxed during the Olympics.
Although the impact of brand programs is relatively hard to measure, the customers they attract are, in the long run, the ones you want most.
Although the impact of a given reform movement may be minor, the techniques it develops for creating citizens far extend the reach of govermental authority.
Although the impact of microRNAs (miRNAs) in development and disease is well established, understanding the function of individual miRNAs remains challenging.
