Topical Finasteride (applied twice daily onto your scalp) is a modern method that procures efficient hair loss treatment with possible lower systemic adverse occurrences, according to clinical studies.
Happy Head uses the stronger version of Finasteride concentration (Finasteride 0.3%) because clinical pharmacokinetic study of Topical Finasteride by Caserini et al. in 2015 showed that only the 0.25% Finasteride produced the similar scalp DHT reduction as the oral Finasteride 1mg. In other words, Finasteride 0.1% concentration did not achieve the same level of efficacy in lowering scalp DHT as Finasteride 0.25%, confirming the idea that higher concentration of Finasteride is better than lower concentration. In addition, Topical Finasteride may be a safer alternative to oral Finasteride. The only difference is that Topical Finasteride is not ingested and only applied topically to the scalp.