A number of readers have written in asking how to apply Folligen to their eyelashes- A clever question since nowhere on Folligen's instructions does it indicate that this bright blue potion can double as an eyelash growth product. Skin Biology's Folligen cream is intended for use on the scalp, where its copper peptides make the hair follicles grow in strong and thick. But thanks to a tip from a reader, Marta discovered that the product's effectiveness at restoring sparse patches of hair extends to the eye area as well.

If your eyelashes or eyebrows could use some filling in, you'd be hard-pressed to find a better buy than Folligen. Not only does a little go a very long way, but it has so many uses and is far more natural than many traditional remedies. Instead of the glaucoma drug called prostaglandins (found in most eyelash growth products on the market today) or dihydrotestosteone (found in most hair growth treatments), Folligen uses copper peptides. This active ingredient triggers hair growth by stimulating the capillaries to help follicles switch from the dormant telogen phase into the hair-growing anagen phase.

Using Folligen on your scalp is self-explanatory. All it takes is a dollop rubbed into your hairline or patch of thinning hair. To apply Folligen to your eyebrows, dip your pinkie or a Q-tip in the mouth of the bottle until it is coated in blue liquid. Then, trace a precise line where you are pining for a bushier brow. Getting Folligen to elongate your eyelashes is a trickier task, best explained in Marta's video. A quick disclaimer: more liquid does not lead to longer lashes. If you use Folligen sparingly, just as you would a liquid eyeliner, you should experience no irritation and gradual lash growth.

Ingredients in Folligen cream:

Purified water, squalane, octyl palmitate, PEG-100 stearate (glycerol stearate + PEG-100 stearate), cetyl alcohol, copper peptides (hydrolyzed soy protein and copper chloride), stearic acid, saw palmetto oil, allantoin, polypropylene glycol, diazolinydinyl urea, methylparaben, propylparaben, herbal fragrance, tocopheryl acetate, retinyl palmitate, ergocalciferol