I have seen thousands of patients over the years and I think that you will find the information very helpful. In my experience it is life changing for quite a few people.
Each consultation will be tailored to your understanding of medicine/science. So if you are 35 years old or older you may wish to book an appoinment-I hope and expect that it will be the best £99 you ever spend!
Your payments can be through PayPal (either via their credit card system or your PayPal account) or via the credit card system via Stripe. Stripe is becoming a standard for e-commerce and is used by Amazon. Stripe is a $20 billion corporation and is PCI Service Provider Level 1 the most stringent level of certification available in the payments industry.
So whatever payment option you choose on this site should be absolutely secure.