There are a few hundred Test Subjects doing very well on 2 IU's of Viking Nectar (VN); 5 days on and 2 days off. Some have gone up to 4 IU's. Increased IGF-1 values have proven the effectiveness of Viking Nectar. But of course I'm not very objective when it comes to this since it's the product I recommend. What you could do is get two IGF-1 Testing Kits: https://livelikeaviking.com/product/igf-1-blood-spot-b-2/. Do one before your subject starts VN and the other about 1.5 to 2 months after. That would remove all skepticism.