58f disappointed with results. L1-4 went up from -2.8 to -2.9 Left femoral went down from -2.7 to -2.6 Right femoral stay same -2.6
NothingLongevity · Oral · osteoporosis
58, Designs for Health Whole Body Collagen + calcium + PEMF for a year
Users report
The liveliest reports come from r/osteoporosis: several women describe DEXA T-scores climbing (for example spine -2.2 to -1.4, -2.9 to -2.3) after 1-2 years of 5 g Fortibone, nearly always alongside weight training, HRT, calcium/D or drugs, so the collagen's share is unknowable. Others saw no DEXA change after a year. Joint and tendon users report less ache and a sense that pain returns when they stop. Faster nails and less hair shedding are a frequent side benefit. About a quarter notice nothing, and a few get stomach upset, a rash or histamine-type reactions, mostly with multi-ingredient blends. Tendon users following the gelatin/collagen plus vitamin C pre-loading protocol split between 'it worked for me' and 'did nothing'. Felt nothing: ~25% of reports.
Best effects
Bone density gains reported on DEXA (heavily confounded) · less joint ache; pain returns when stopped · less activity-related knee pain (Fortigel) · faster nails, less hair shedding, softer skin (Verisol) · tendon support with loading rehab (Tendoforte / pre-exercise protocol)
Downsides
Stomach upset in some · rash or histamine-type reaction with some blends · bovine taste/smell in some brands · costs 2-4 times generic collagen
Evidence
Human RCTs — several mid-sized RCTs per product (bone n=131, knee pain n=180, skin n=114, tendon n=20-40), nearly all funded by or co-authored with the maker Gelita; no head-to-head trials against generic collagen
Caveat
The brand distinction is largely industry-driven: Gelita funds or co-authors nearly all the trials, and none compares Fortibone or Fortigel with generic collagen at the same dose, so whether the 'specific' peptides beat cheap hydrolysate is unproven. Bone-density anecdotes come with weight training, HRT or drugs alongside. Collagen powders can carry trace heavy metals, so third-party-tested brands are preferable. Plain collagen is covered by its own entry.
Typical use
5 g/day Fortibone or Fortigel, 5 g Tendoforte, or 2.5 g Verisol; for tendons, 10-15 g collagen or gelatin plus vitamin C 30-60 min before loading.
Getting it
Gelita sells only to brands, so products vary: Healthy Bones Co. and OsteoNaturals (Fortibone), AlgaeCal Collagen and Designs for Health Whole Body Collagen (Fortibone + Fortigel + Verisol), Momentous Collagen (5 g Fortigel + 10 g generic), Saltwrap and others (Tendoforte), Costco TruNature and Sparkle (Verisol).
Stacked with
Vitamin C (with or before the dose): needed for collagen synthesis; the pre-exercise protocol uses 50 mg+ vitamin C · loading exercise: every positive tendon and bone trial paired the peptides with training; 30-60 min before a tendon session · calcium, vitamin D, K2: standard companions in the osteoporosis threads
The outer changes that I've seen since starting are that my fingernails are gorgeous. They are long and strong and actually look good without polish. My hairline had started to recede a bit. I'm noticing a lot of hair growing back.
PositiveSkin & hair · Oral · bone health
AlgaeCal and Healthy Bones (Fortibone + Fortigel + Verisol) since February; DEXA pending
I started with Momentous 15g Collagen about 8 weeks ago. It may all be in my head, but my shoulders feel pretty good, and I am adding weight consistently.
Positive15 g (10 g collagen + 5 g Fortigel) · Oral · chronic shoulder problems
69-year-old lifelong lifter, Momentous Collagen for 8 weeks; allows it may be placebo
My dexa scan of my spine went from -2.2 to -1.4 in 2 years using fortibone daily. Same machine, different tech. Im also taking calcium, vitamin D, K2, and lifting weights 4 times a week. I was stunned!
PositiveLongevity · 5 g Fortibone daily · Oral · osteopenia
also calcium, D, K2 and lifting 4x/week; cannot take HRT
It’s spendy, but it is tasteless (I mix it in my coffee) and doesn’t cause GI upset. I also went from -2.4 to -1.8 in my spine. I credit HRT and fortibone.
PositiveLongevity · Oral · osteoporosis
Designs for Health Whole Body Collagen (Fortibone + Fortigel + Verisol); credits HRT and Fortibone
within a week my knee really started acting up! And I felt I had aching joints everywhere (my collagen has fortibone + one for that supposedly helps joints). Anyway, I started taking it again & the joint aches have subsided.
PositiveOral · osteoporosis and joint aches
1.5 years of a Fortibone + joint-peptide blend; stopped and restarted
I like the fortibone and the other one for skin. I get the unflavored ones, it's just hard to develop the habit. Thanks all for rebinding me to keep trying, as it does help with my creaky arthritic joints.
I'm doing Momentous, which I like a lot and have seen some results (joint pain is still an issue, but I have a bunch of other stuff going on; my nails are growing faster, and my body worker said my muscles feel more pliable
It works well enough; between that for the last 6 months or so and the glucosamine/chondroitin/MSM I've been taking for the last 15 or so years, my joints haven't gotten as bad as my family members, but I'd love for them to *improve.*
MixedOral · joint maintenance
Vital Proteins professional formula with Fortigel and Fortibone for 6 months, plus long-term glucosamine
I bought Regenos on amazon because it was cheaper, I took almost a can, had a terrible rash that took almost 3 months to clear up AFTER i stopped using it.
MixedSkin & hair · Oral
used several Fortibone brands; blames undeclared ingredients in one
I started taking fortibone collagen, mega d3 and mk7, and boron. I’m doing a lot of spinal loading exercises. I did a test 2 years later and nothing changed
NothingLongevity · Oral · mild spinal osteopenia
Fortibone with D3, K2, boron and spinal loading for 2 years
I took Healthy Bones collagen powder supplement for almost a full year before my recent DEXA. It has Fortibone in it. I was also in my 2nd (non-consecutive) year of Evenity injections during that time. I had no improvements in any of my DEXA results.
NothingLongevity · Oral · osteoporosis
Healthy Bones (Fortibone) for almost a year alongside Evenity injections
I tried taking it (in the Algaecal complete collagen mix) and couldn’t tolerate the histamine reaction it set off, at even a greatly reduced serving size. Also made my face and scalp break out.
Bad reactionLongevity · Oral
AlgaeCal Complete Collagen mix
Safety
Tier by safety barStrict CleanBalanced CleanEvidence only Clean
Each bead is one amino acid in the peptide's chain, coloured by its side chain: grey for non-polar, cyan for polar, blue for positively charged and fuchsia for negatively charged. Length and mix tell related peptides apart at a glance, from a two-residue dipeptide like carnosine to a 43-residue protein like thymosin beta-4. The colours describe chemistry only and predict neither effect nor safety.
non-polarpolarpositivenegative
Report grades
Every first-hand Reddit or X report is graded on its own, from glowing through positive, mixed, nothing and negative to bad reaction, and the bar shows how those grades split. Posts that look vendor-adjacent stay on the peptide's page but are left out of the counts.
GlowingPositiveMixedNothingNegativeBad reaction
% positive
The share of a peptide's graded Reddit and X reports that are glowing or positive, vendor-adjacent posts left out. A peptide with few reports is pulled toward the average of all reports, as if it had eight average ones besides its own, so two glowing posts cannot top the list. Kept peptides rank by the same reports' mean grade, shrunk the same way, and excluded ones follow in that order.
Researcher estimate
No first-hand report of this peptide has been graded yet, so the figure is the researchers' own rating out of 10 from what they read about it. It ranks alongside the computed scores until reports arrive.
Safety tier
Each peptide is tiered clean, caution or excluded from its five risk axes under the chosen safety bar. An excluded peptide has a plausible route to serious harm, so it stays listed with the reason but ranks behind every other entry, however good its reviews.
Safety bar
The safety bar sets how much risk it takes to exclude a peptide. Strict: out on any serious mechanism with little human data, or any documented serious harm. Balanced: out on documented serious harm (unless it is obvious, reversible and from a regulated product), or a serious mechanism whose harm would be silent with no human data at all. Evidence only: out only on documented serious harm in humans that is lasting, delayed or from grey-market product.
Seen harm
Documented serious adverse events in humans, from 0 for none despite real exposure to 3 for deaths or several well-documented serious harms. Serious means a hospital or emergency visit or harm lasting weeks, so a headache or a bad night does not count.
Mechanism
A plausible biological route to serious harm at the doses people use, such as growth-factor signalling, hormone-axis suppression, heart or blood-pressure effects or immune activation. It runs from 0 when none is known to 3 when a dangerous pathway has been shown in living animals.
Data gap
How little human safety data exists for the molecule actually sold, from 0 for an approved drug with large trials and years of use to 3 for no human safety data at all. A modified analogue does not inherit its parent's trials.
Silent harm
Whether the feared harm would show quickly or stay hidden, from 0 when it is obvious and goes on stopping to 3 when it is silent and delayed, like tumour promotion or slow organ damage. User reports cannot reveal a harm that takes years to appear, so a high score here limits what good reviews can tell you.
Product
The risk of what people actually buy, from 0 for a regulated pharmacy or supplement product taken by mouth or on the skin to 3 for a grey-market injectable. In one dataset of 6,441 grey-market samples, 42–71% failed basic quality criteria and 15% carried endotoxin.
Evidence
The strongest kind of study behind the peptide's effects, from an approved drug through human controlled trials and small human studies to animal work or nothing of its own. Animal results often fail to carry over to people.
Access
How people get it: as an approved drug, a compounded prescription, an over-the-counter supplement or from the grey market, where nobody checks the vial. The channel decides both the legal position and the risk of a bad batch.
Price per month
Thirty days of the typical dose, from its low end to its high end, priced at the listing a careful buyer would choose: in stock, from a shop scoring 4 of 5 on trust (third-party tested where no score is set), failing that 3, a pure pack before a blend, a European shop first, then the cheapest per mg. The range is the dose's, not the shops'. A per-dose amount counts once a day unless the dose says otherwise. Prices are in euros at ECB rates of 2026-10-29, before shipping; the shop table keeps each listing's price per mg, per gram for bulk supplements. Where no listing can be priced the researchers' own estimate stands in, and says so.
Dose users report
The middle half of the daily doses stated in at least five first-hand reports, vendor posts left out. Where its middle sits more than twice above or below the declared dose, the month is priced at it as well, since what people take is what they pay for.
Testing
Whether the shop publishes lab results: third-party tested means an independent lab checks each batch, own COA means the shop's own certificate of analysis, and no public tests means neither. A certificate shows purity, not safety.
Added peptide
Some packs sold under one peptide's name hold a second one, such as 5 mg GHK-Cu in a nasal kit, stated only in the description. Sprayed in the nose or injected it reaches the blood like an injection, so it carries the risk of that route and is tiered as the injectable form, whatever its tier on the skin. A pack whose page gives no contents list may hold more than its name.