Biotin is Vitamin B which is a vitamin supplement, would generally not cause weight gain.
Unless it has some more ingredients that has probably caused this.
For weight management, please use FLAB DOWN SERUM which helps through regulating metabolic pathways and also works on the mind.
Add BEAUTY SERUM and ALPHA WOMAN SERUM to have desired body shape and other feminine features. BALANCE SERUM can be added by default. This will also take care of hair.
For your knee pain, you can separately take PAIN CARE SERUM , ALL CLEAR SERUM and GYM SERUM.
ALL CLEAR SERUM will help to remove any unwanted effects due to medicines or any other negativity. GYM SERUM will help in flexibility of body as it has energy of exercises.
Add GOLDEN SUNRISE to all healing to enhance the effects !!
Request VK GOLDEN SUNRISE BLESS ME A HEALTHY BODY WITH PERFECT WEIGHT NOW FOREVER !!