Buen precioMejora el rendimiento sexual además de darte mas energía.My 150 year old knees (they aged faster than I did) have developed a bit of arthritis. I found out from an MRI that I've torn tendons in my knee (the doctor didn't think I needed an MRI originally, so the tears that I thought I had weren't diagnosed properly).My diet didn't have much protein in it, either.I started taking Men's Collagen Advanced with Biotin at the recommended dose (six large tablets daily), and in just days, some of the issues with both knees seemed to improve. I can walk without (or with much less) pain, my fingernails seem to be growing more quickly than they had for quite a while before I started taking this supplement, and the nails are much stronger.I had concerns about one of the added ingredients (Fo-Ti) and coumadin, but regular testing didn't show any effect on my clotting.For now, I'm pretty sure that this helps my joints, that the Biotin is helping my skin, nails, and possibly my hair, and that it's probably supplementing the amino acids that I'm missing from my diet.A few more things:Don't bother contacting the manufacturer with questions or comments. As other reviewers have noted, they either don't respond, or do so very slowly (it's been weeks, but I haven't gotten a response).I've seen complaints about the size of the tablets, and having to take six a day. I've seen some say that they want smaller tablets. I don't think this is possible. Some things can't be compacted further than they already are -- you're getting a lot of collagen in these tablets -- they HAVE TO BE large in order to provide the collagen. This has probably been reduced as small as it can be to provide the benefits. I usually take 4 in the morning (sometimes all six) after a morning meal, and two later in the day.There've been complaints about an odor. My batch didn't have that problem, but a bottle that I had a few years ago DID. So -- if you're troubled by an odor from these tablets - don't inhale when you take them. The benefits (in my case, at least) far outweigh a bit of odor from the tablets when you swallow them.I have friends who take these. they said load with the recommended 6 tabs for two days then cut down to 2 ( 1 in am 1 at lunch ) as it has a documented good chance of giving you a headache , as it's a new highly potent chemical your adding to your body you may not be able to handle it if under 200lbs at recommended dose. Two with a 10000 mcg biotin tab separately will get you the results your looking for without the headaches and heart palpitations. One friend went into svt Super ventricular tachycardia after using these 6 per day for 2 weeks. - I'm sure isolated case and she did have this heart issue in the past before but rarely had an episode - in past 5 years probably better to use less and build up a tolerance and be safe. 1 to 2 with a meal with separate 5000 to 10000mcg biotin will help with hair skin and nails effectively. The amino acids in here are great but high dose - really depends on your BMI how you metabolize these or any vitamins ( really better to start with less and go up if you can , safe is better than not ) the pills in first 2 days gave me stomach issues and I eat jalapeno peppers like candy, so please eat food first and consume almond milk or cow's milk to help digestion. My bottle had a few dozen broken ones in the bottle , no biggie but disappointed with that, but overall Surprised as I see how these help with eczema and acne scars ( amazing ) on friends and the joint cartilage really does regenerate or re hydrates somehow easing pain 20 % or more depending on the person's BMI and age and activity level. At under $20 a bottle wow for what it does but the instructions should be more detailed and the nausea, headaches, and other possible effects should be listed. There are other options out there but at 2 to 3 times the price. Do your own research and try if you like, personally think go small and go up if you can or want - you'll see results in 3 - 4 weeks if religious in using this collagen formula, do remember to take any vitamin with food and liquid. Personal warning might not suggest if you have high blood pressure or history of heart or respiratory issues personally or in family history - like I said safe is better than sorry.I was using the regular You Theory collagen and liked it. I like the additional ingredients for men. Not sure what those extra ingredients do, if anything. I take lower dosages and get good results with just 2 to 4 tablets a day. At 69 keeping a youthful look even though I have always looked younger than I am. Helps most with smoothing out and reducing bags under the eyes, crows feet, and smooths out crepe skin look. Also helps with joints and joint pain and swelling.Since I started taking joint collagen, I feel much better. No more stiffness because I am a bicyclist and I'm 41 years old. This works.I am 51 years old and have been using this product for more than five years. I used to buy it at Costco until I found the subscription on Amazon.I was an athlete through high school and college until my early forties mostly playing basketball and running 800 meters to 5k events. I developed some pain in my hips and knees as I went past the 40 years old mark. This product quickly brought significant relief that I was able to confirm after not having the product for a few weeks because it was out of stock. The pain appeared again and disappeared when I restarted taking the product.I go through my annual medical check ups and blood tests and none has shown any problems with my liver or kidneys. I take two to three capsules a day not the six capsules recommended dosage because I eat a mostly healthy and balanced diet.Most effective collagen, but need good diet , exercise, then will work otherwise nothing can stop your aging. All have be together in balance; this collagen combination it’s working fantastic for me , don’t be misleading there no magic tablets if you eating rubbish and don’t do any exercise- Grimy, unclean outer packaging- Labels improperly affixed to bottle- Inner seal not intactPotentially an unsafe or risk-prone product, avoid.I like it !!!!!....healthy !!!!...necessary for everybody !!!!!....I’ve taken this for twice a day for three weeks and notice rashes and swelling on my fingers and toes. I’ve stopped taking since. I hope it clears. NOT GOOD AT ALLFace wrinkle smasher.